iOS,文本输入,键盘相关

1.UIKeyboard键盘相关知识点

2.点击空白区域隐藏键盘(UIKeyboard)

3.键盘(UIKeyboard)挡住输入框处理

4.自定义键盘(UIKeyboard) 

5.监听键盘弹出或消失消息

6.UITextField和UITableView自定义下拉列表框

7.使用UIPickerView在UITextField实现滚动选择

8.使用UIDatePicker在UITextField实现日期选择

9.设置文本输入框样式

UIKeyboard键盘相关知识点

一、键盘风格

UIKit框架支持8种风格键盘。

typedef enum {
　　UIKeyboardTypeDefault, // 默认键盘：支持所有字符
　　UIKeyboardTypeASCIICapable, // 支持ASCII的默认键盘
　　UIKeyboardTypeNumbersAndPunctuation, // 标准电话键盘，支持+*#等符号
　　UIKeyboardTypeURL, // URL键盘，有.com按钮；只支持URL字符
　　UIKeyboardTypeNumberPad, //数字键盘
　　UIKeyboardTypePhonePad, // 电话键盘
　　UIKeyboardTypeNamePhonePad, // 电话键盘，也支持输入人名字
　　UIKeyboardTypeEmailAddress, // 用于输入电子邮件地址的键盘
} UIKeyboardType;

用法用例：textView.keyboardtype = UIKeyboardTypeNumberPad;

二、键盘外观

typedef enum {
　　UIKeyboardAppearanceDefault, // 默认外观：浅灰色
　　UIKeyboardAppearanceAlert, //深灰/石墨色
} UIKeyboardAppearance;

用法用例：textView.keyboardAppearance=UIKeyboardAppearanceDefault;

三、回车键

typedef enum {
　　UIReturnKeyDefault, //默认：灰色按钮，标有Return
　　UIReturnKeyGo, //标有Go的蓝色按钮
　　UIReturnKeyGoogle, //标有Google的蓝色按钮，用于搜索
　　UIReturnKeyJoin, //标有Join的蓝色按钮
　　UIReturnKeyNext, //标有Next的蓝色按钮
　　UIReturnKeyRoute, //标有Route的蓝色按钮
　　UIReturnKeySearch, //标有Search的蓝色按钮
　　UIReturnKeySend, //标有Send的蓝色按钮
　　UIReturnKeyYahoo, //标有Yahoo!的蓝色按钮，用于搜索
　　UIReturnKeyDone, //标有Done的蓝色按钮
　　UIReturnKeyEmergencyCall, //紧急呼叫按钮
} UIReturnKeyType;

用法用例：textView.returnKeyType=UIReturnKeyGo;

四、自动大写

typedef enum {
　　UITextAutocapitalizationTypeNone, //不自动大写
　　UITextAutocapitalizationTypeWords, //单词首字母大写
　　UITextAutocapitalizationTypeSentences, //句子首字母大写
　　UITextAutocapitalizationTypeAllCharacters, //所有字母大写
} UITextAutocapitalizationType;

用法用例：textField.autocapitalizationType = UITextAutocapitalizationTypeWords;

五、自动更正

typedef enum {
　　UITextAutocorrectionTypeDefault,//默认
　　UITextAutocorrectionTypeNo,//不自动更正
　　UITextAutocorrectionTypeYes,//自动更正
} UITextAutocorrectionType;

用法用例：textField.autocorrectionType = UITextAutocorrectionTypeYes;

六、安全文本输入

textView.secureTextEntry=YES;

开启安全输入主要是用于密码或一些私人数据的输入，此时会禁用自动更正和自此缓存。

//点击回车键的回调

UITextFieldDelegate

-(BOOL)textFieldShouldReturn:(UITextField *)textField{
    return YES;
}

点击空白区域隐藏键盘(UIKeyboard)  

//结束触摸
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
    //isExclusiveTouch一个布尔值来指示接收机处理触摸事件。
    //没有触摸_textUser进入if内操作
    if (![_textUser isExclusiveTouch]) {
        //resignFirstResponder取消第一响应者状态的。如果对textfield使用的话，那么调用这个方法，textfield的第一响应者状态就会取消，然后键盘就消失了。
        [_textUser resignFirstResponder];
    }
}

 //或者

//结束触摸
-(void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
 [self.view endEditing:YES];//收回键盘
}

键盘(UIKeyboard)挡住输入框处理  

//需要处理输入框被键盘挡住的.h文件，遵守UITextFieldDelegate协议

#import <UIKit/UIKit.h>
#import "MyKeyboard.h"
@interface Test2ViewController : UIViewController<MykeyBoardDelegate,UITextFieldDelegate>
@end

 

//需要处理输入框被键盘挡住的.m文件，实现UITextFieldDelegate协议方法

 //实现委托
  _textUser.tag=1;
  _textUser.delegate=self;
  _textPwd.tag=2;
  _textPwd.delegate=self;

//选中开始编辑文本框内容

-(void)textFieldDidBeginEditing:(UITextField *)textField{
     _textTag=textField.tag;
    //根据tag判断这个键盘是否是被遮住的键盘
    if (_textTag==2) {
        //将界面上移避免文本框被键盘挡住
        CGRect frame = self.view.frame;
        frame.origin.y -=200;
        frame.size.height +=200;
        self.view.frame = frame;
    }
}

//结束编辑文本框内容

-(void)textFieldDidEndEditing:(UITextField *)textField{
    //根据tag判断这个键盘是否是被遮住的键盘
    if (_textTag==2) {
        CGRect frame=self.view.frame;
        frame.origin.y+=200;
        frame.size.height-=200;
        self.view.frame=frame;
   } 
}

自定义键盘(UIKeyboard)

//MyKeyboard.h文件（自定义键盘）

#import <UIKit/UIKit.h>
@protocol MykeyBoardDelegate<NSObject>
//文本框值输入委托
-(void)myKeyBoardInput:(NSString *)inputString;
//删除文本框字委托
-(void)myKeyBoardBack;
//隐藏键盘委托
-(void)myKeyBoardOK;
@end

@interface MyKeyboard : UIView
@property (nonatomic,weak) id<MykeyBoardDelegate> delegate;//声明一个委托变量
@end

//MyKeyboard.m文件（自定义键盘）

//
//  MyKeyboard.m
//  GGTabBarDemo
//
//  Created by Vie on 15/7/23.
//  Copyright (c) 2015年 Vie. All rights reserved.
//

#import "MyKeyboard.h"

@implementation MyKeyboard

-(id)initWithFrame:(CGRect)frame{
    
    self=[super initWithFrame:frame];
    if (self) {
        self.bounds=CGRectMake(0, 0, frame.size.width, frame.size.height);
        //第一横排键盘
        UIButton *button600=[[UIButton alloc] initWithFrame:CGRectMake(frame.size.width*0.005, 0, frame.size.width*0.19, frame.size.height*0.24)];
        [button600.layer setCornerRadius:2.0];
        [button600.layer setBorderWidth:0.5];
        [button600 setBackgroundColor:[UIColor whiteColor]];
        [button600 setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        [button600 setTitle:@"600" forState:UIControlStateNormal];
        [button600 addTarget:self action:@selector(inputAction:) forControlEvents:UIControlEventTouchUpInside];
        [self addSubview:button600];
        
        UIButton *button1=[[UIButton alloc] initWithFrame:CGRectMake(frame.size.width*0.2, 0, frame.size.width*0.19, frame.size.height*0.24)];
        [button1.layer setCornerRadius:2.0];
        [button1.layer setBorderWidth:0.5];
        [button1 setBackgroundColor:[UIColor whiteColor]];
        [button1 setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        [button1 setTitle:@"1" forState:UIControlStateNormal];
        [button1 addTarget:self action:@selector(inputAction:) forControlEvents:UIControlEventTouchUpInside];
        [self addSubview:button1];
        
        UIButton *button2=[[UIButton alloc] initWithFrame:CGRectMake(frame.size.width*0.4, 0, frame.size.width*0.19, frame.size.height*0.24)];
        [button2.layer setCornerRadius:2.0];
        [button2.layer setBorderWidth:0.5];
        [button2 setBackgroundColor:[UIColor whiteColor]];
        [button2 setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        [button2 setTitle:@"2" forState:UIControlStateNormal];
        [button2 addTarget:self action:@selector(inputAction:) forControlEvents:UIControlEventTouchUpInside];
        [self addSubview:button2];
        
        UIButton *button3=[[UIButton alloc] initWithFrame:CGRectMake(frame.size.width*0.6, 0, frame.size.width*0.19, frame.size.height*0.24)];
        [button3.layer setCornerRadius:2.0];
        [button3.layer setBorderWidth:0.5];
        [button3 setBackgroundColor:[UIColor whiteColor]];
        [button3 setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        [button3 setTitle:@"3" forState:UIControlStateNormal];
        [button3 addTarget:self action:@selector(inputAction:) forControlEvents:UIControlEventTouchUpInside];
        [self addSubview:button3];
        
        
        UIButton *buttonX=[[UIButton alloc] initWithFrame:CGRectMake(frame.size.width*0.8, 0, frame.size.width*0.19, frame.size.height*0.24)];
        [buttonX.layer setCornerRadius:2.0];
        [buttonX.layer setBorderWidth:0.5];
        [buttonX setBackgroundColor:[UIColor whiteColor]];
        [buttonX setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        [buttonX setTitle:@"X" forState:UIControlStateNormal];
        [buttonX addTarget:self action:@selector(backAction:) forControlEvents:UIControlEventTouchUpInside];
        [self addSubview:buttonX];
        //第二横排键盘
        UIButton *button601=[[UIButton alloc] initWithFrame:CGRectMake(frame.size.width*0.005, frame.size.height*0.25, frame.size.width*0.19, frame.size.height*0.24)];
        [button601.layer setCornerRadius:2.0];
        [button601.layer setBorderWidth:0.5];
        [button601 setBackgroundColor:[UIColor whiteColor]];
        [button601 setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        [button601 setTitle:@"601" forState:UIControlStateNormal];
        [button601 addTarget:self action:@selector(inputAction:) forControlEvents:UIControlEventTouchUpInside];
        [self addSubview:button601];
        
        UIButton *button4=[[UIButton alloc] initWithFrame:CGRectMake(frame.size.width*0.2, frame.size.height*0.25, frame.size.width*0.19, frame.size.height*0.24)];
        [button4.layer setCornerRadius:2.0];
        [button4.layer setBorderWidth:0.5];
        [button4 setBackgroundColor:[UIColor whiteColor]];
        [button4 setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        [button4 setTitle:@"4" forState:UIControlStateNormal];
        [button4 addTarget:self action:@selector(inputAction:) forControlEvents:UIControlEventTouchUpInside];
        [self addSubview:button4];
        
        UIButton *button5=[[UIButton alloc] initWithFrame:CGRectMake(frame.size.width*0.4, frame.size.height*0.25, frame.size.width*0.19, frame.size.height*0.24)];
        [button5.layer setCornerRadius:2.0];
        [button5.layer setBorderWidth:0.5];
        [button5 setBackgroundColor:[UIColor whiteColor]];
        [button5 setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        [button5 setTitle:@"5" forState:UIControlStateNormal];
        [button5 addTarget:self action:@selector(inputAction:) forControlEvents:UIControlEventTouchUpInside];
        [self addSubview:button5];
        
        UIButton *button6=[[UIButton alloc] initWithFrame:CGRectMake(frame.size.width*0.6, frame.size.height*0.25, frame.size.width*0.19, frame.size.height*0.24)];
        [button6.layer setCornerRadius:2.0];
        [button6.layer setBorderWidth:0.5];
        [button6 setBackgroundColor:[UIColor whiteColor]];
        [button6 setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        [button6 setTitle:@"6" forState:UIControlStateNormal];
        [button6 addTarget:self action:@selector(inputAction:) forControlEvents:UIControlEventTouchUpInside];
        [self addSubview:button6];
        
        UIButton *button002=[[UIButton alloc] initWithFrame:CGRectMake(frame.size.width*0.8, frame.size.height*0.25, frame.size.width*0.19, frame.size.height*0.24)];
        [button002.layer setCornerRadius:2.0];
        [button002.layer setBorderWidth:0.5];
        [button002 setBackgroundColor:[UIColor whiteColor]];
        [button002 setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        [button002 setTitle:@"002" forState:UIControlStateNormal];
        [button002 addTarget:self action:@selector(inputAction:) forControlEvents:UIControlEventTouchUpInside];
        [self addSubview:button002];
        //第三横排键盘
        UIButton *button000=[[UIButton alloc] initWithFrame:CGRectMake(frame.size.width*0.005, frame.size.height*0.5, frame.size.width*0.19, frame.size.height*0.24)];
        [button000.layer setCornerRadius:2.0];
        [button000.layer setBorderWidth:0.5];
        [button000 setBackgroundColor:[UIColor whiteColor]];
        [button000 setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        [button000 setTitle:@"000" forState:UIControlStateNormal];
        [button000 addTarget:self action:@selector(inputAction:) forControlEvents:UIControlEventTouchUpInside];
        [self addSubview:button000];
        
        UIButton *button7=[[UIButton alloc] initWithFrame:CGRectMake(frame.size.width*0.2, frame.size.height*0.5, frame.size.width*0.19, frame.size.height*0.24)];
        [button7.layer setCornerRadius:2.0];
        [button7.layer setBorderWidth:0.5];
        [button7 setBackgroundColor:[UIColor whiteColor]];
        [button7 setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        [button7 setTitle:@"7" forState:UIControlStateNormal];
        [button7 addTarget:self action:@selector(inputAction:) forControlEvents:UIControlEventTouchUpInside];
        [self addSubview:button7];
        
        UIButton *button8=[[UIButton alloc] initWithFrame:CGRectMake(frame.size.width*0.4, frame.size.height*0.5, frame.size.width*0.19, frame.size.height*0.24)];
        [button8.layer setCornerRadius:2.0];
        [button8.layer setBorderWidth:0.5];
        [button8 setBackgroundColor:[UIColor whiteColor]];
        [button8 setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        [button8 setTitle:@"8" forState:UIControlStateNormal];
        [button8 addTarget:self action:@selector(inputAction:) forControlEvents:UIControlEventTouchUpInside];
        [self addSubview:button8];
        
        UIButton *button9=[[UIButton alloc] initWithFrame:CGRectMake(frame.size.width*0.6, frame.size.height*0.5, frame.size.width*0.19, frame.size.height*0.24)];
        [button9.layer setCornerRadius:2.0];
        [button9.layer setBorderWidth:0.5];
        [button9 setBackgroundColor:[UIColor whiteColor]];
        [button9 setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        [button9 setTitle:@"9" forState:UIControlStateNormal];
        [button9 addTarget:self action:@selector(inputAction:) forControlEvents:UIControlEventTouchUpInside];
        [self addSubview:button9];
        
        UIButton *button300=[[UIButton alloc] initWithFrame:CGRectMake(frame.size.width*0.8, frame.size.height*0.5, frame.size.width*0.19, frame.size.height*0.24)];
        [button300.layer setCornerRadius:2.0];
        [button300.layer setBorderWidth:0.5];
        [button300 setBackgroundColor:[UIColor whiteColor]];
        [button300 setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        [button300 setTitle:@"300" forState:UIControlStateNormal];
        [button300 addTarget:self action:@selector(inputAction:) forControlEvents:UIControlEventTouchUpInside];
        [self addSubview:button300];
        
        //第四横排键盘
        
        UIButton *button0=[[UIButton alloc] initWithFrame:CGRectMake(frame.size.width*0.2, frame.size.height*0.75, frame.size.width*0.19, frame.size.height*0.24)];
        [button0.layer setCornerRadius:2.0];
        [button0.layer setBorderWidth:0.5];
        [button0 setBackgroundColor:[UIColor whiteColor]];
        [button0 setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        [button0 setTitle:@"0" forState:UIControlStateNormal];
        [button0 addTarget:self action:@selector(inputAction:) forControlEvents:UIControlEventTouchUpInside];
        [self addSubview:button0];
        
        UIButton *buttonPoint=[[UIButton alloc] initWithFrame:CGRectMake(frame.size.width*0.4, frame.size.height*0.75, frame.size.width*0.19, frame.size.height*0.24)];
        [buttonPoint.layer setCornerRadius:2.0];
        [buttonPoint.layer setBorderWidth:0.5];
        [buttonPoint setBackgroundColor:[UIColor whiteColor]];
        [buttonPoint setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        [buttonPoint setTitle:@"." forState:UIControlStateNormal];
        [buttonPoint addTarget:self action:@selector(inputAction:) forControlEvents:UIControlEventTouchUpInside];
        [self addSubview:buttonPoint];
        
        UIButton *buttonOK=[[UIButton alloc] initWithFrame:CGRectMake(frame.size.width*0.6, frame.size.height*0.75, frame.size.width*0.19, frame.size.height*0.24)];
        [buttonOK.layer setCornerRadius:2.0];
        [buttonOK.layer setBorderWidth:0.5];
        [buttonOK setBackgroundColor:[UIColor whiteColor]];
        [buttonOK setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        [buttonOK setTitle:@"确定" forState:UIControlStateNormal];
        [buttonOK addTarget:self action:@selector(backAction:) forControlEvents:UIControlEventTouchUpInside];
        [self addSubview:buttonOK];
        
        
    }
    return self;

}

-(void)inputAction:(UIButton *)sender{
    [self.delegate myKeyBoardInput:[sender currentTitle]];
}
-(void)backAction:(UIButton *)sender{
    if ([[sender currentTitle] isEqualToString:@"确定"]) {
        [self.delegate myKeyBoardOK];
    }else if ([[sender currentTitle] isEqualToString:@"X"]){
        [self.delegate myKeyBoardBack];
    }
    
}
@end

//Test2ViewController.h文件，需要用到自定义软件盘的文本框

#import <UIKit/UIKit.h>

#import "MyKeyboard.h"

@interface Test2ViewController : UIViewController<MykeyBoardDelegate,UITextFieldDelegate>

 

@end

//Test2ViewController.m文件，需要用到自定义软件盘的文本框

//
//  Test2ViewController.m
//  
//
//  Created by Vie on 15/7/22.
//
//

#import "Test2ViewController.h"
#import "MyKeyboard.h"
@interface Test2ViewController ()
@property (nonatomic,strong) UITextField *textUser,*textPwd;
@property (nonatomic) int textTag;
@end

@implementation Test2ViewController
@synthesize textUser=_textUser,textPwd=_textPwd,textTag=_textTag;
- (void)viewDidLoad {
    [super viewDidLoad];
    [self.view setBackgroundColor:[UIColor whiteColor]];
    self.parentViewController.navigationItem.title = @"2";

    //设置标题
    self.navigationItem.title = @"登陆";
    
    //修改导航栏背景色
    [self.navigationController.navigationBar setBarTintColor:[UIColor colorWithRed:30/255.0 green:144/255.0 blue:255/255.0 alpha:0.5]];
    //设置标题颜色字体大小
    [self.navigationController.navigationBar setTitleTextAttributes:@{NSFontAttributeName:[UIFont systemFontOfSize:19],NSForegroundColorAttributeName:[UIColor colorWithRed:255/255.0 green:255/255.0 blue:255/255.0 alpha:1]}];
    //修改导航栏背景色
    [self.navigationController.navigationBar setBarTintColor:[UIColor colorWithRed:30/255.0 green:144/255.0 blue:255/255.0 alpha:0.5]];
    //下一个视图的返回按钮文件会改变为下面设置的值
    UIBarButtonItem *returnButtonItem = [[UIBarButtonItem alloc] init];
    returnButtonItem.title = @"";
    self.navigationItem.backBarButtonItem = returnButtonItem;
    //用户名输入文本框
    _textUser=[[UITextField alloc] initWithFrame:CGRectMake(self.view.frame.size.width*0.1, self.view.frame.size.height*0.2, self.view.frame.size.width*0.8, self.view.frame.size.height*0.08)];
    [_textUser setBackgroundColor:[UIColor whiteColor]];
    [_textUser.layer setCornerRadius:5.0];
    [_textUser setPlaceholder:@"用户名"];
    [_textUser.layer setBorderWidth:1];
    //初始化自定义键盘
    MyKeyboard *myKboard=[[MyKeyboard alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height*0.3)];
    //引用自定义键盘
    _textUser.inputView=myKboard;
    //委托
    myKboard.delegate=self;
    _textUser.tag=1;
    _textUser.delegate=self;
   

    [self.view addSubview:_textUser];
    
    //密码输入文本框
    _textPwd=[[UITextField alloc] initWithFrame:CGRectMake(self.view.frame.size.width*0.1, self.view.frame.size.height*0.8, self.view.frame.size.width*0.8, self.view.frame.size.height*0.08)];
    [_textPwd setBackgroundColor:[UIColor whiteColor]];
    [_textPwd.layer setCornerRadius:5.0];
    [_textPwd setPlaceholder:@"密码"];
    [_textPwd.layer setBorderWidth:1];
    _textPwd.inputView=myKboard;
    _textPwd.tag=2;
    _textPwd.delegate=self;
    //响应文本框选中更改
    
    [self.view addSubview:_textPwd];
    
    
}
//选中开始编辑文本框内容
-(void)textFieldDidBeginEditing:(UITextField *)textField{
     _textTag=textField.tag;
    //根据tag判断这个键盘是否是被遮住的键盘
    if (_textTag==2) {
        //将界面上移避免文本框被键盘挡住
        CGRect frame = self.view.frame;
        frame.origin.y -=200;
        frame.size.height +=200;
        self.view.frame = frame;
    }
    
    
}
//结束编辑文本框内容
-(void)textFieldDidEndEditing:(UITextField *)textField{
    //根据tag判断这个键盘是否是被遮住的键盘
      if (_textTag==2) {
    CGRect frame=self.view.frame;
    frame.origin.y+=200;
    frame.size.height-=200;
    self.view.frame=frame;
 }
}

//键盘输入实现
-(void)myKeyBoardInput:(NSString *)inputString{
    //点击的是用户名文本框时
    if (_textTag==1) {
        self.textUser.text=[self.textUser.text stringByAppendingString:inputString];
    }else if(_textTag==2){
        self.textPwd.text=[self.textPwd.text stringByAppendingString:inputString];
    
    }
    

}
//键盘删除实现
-(void)myKeyBoardBack{
    if (_textTag==1) {
        if (self.textUser.text.length>0) {
            self.textUser.text=[self.textUser.text substringToIndex:self.textUser.text.length-1];
        }
    }else if (_textTag==2){
        if (self.textPwd.text.length>0) {
            self.textPwd.text=[self.textPwd.text substringToIndex:self.textPwd.text.length-1];
        }
    }
    
}
//隐藏键盘实现
-(void)myKeyBoardOK{
 if (_textTag==1) {
      [_textUser resignFirstResponder];
 }else if (_textTag==2){
      [_textPwd resignFirstResponder];
 }
}
//结束触摸
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
    //isExclusiveTouch一个布尔值来指示接收机处理触摸事件。
    //没有触摸_textUser进入if内操作
    if (![_textUser isExclusiveTouch]) {
        //resignFirstResponder取消第一响应者状态的。如果对textfield使用的话，那么调用这个方法，textfield的第一响应者状态就会取消，然后键盘就消失了。
        [_textUser resignFirstResponder];
    }
    if (![_textPwd isExclusiveTouch]) {
        //resignFirstResponder取消第一响应者状态的。如果对textfield使用的话，那么调用这个方法，textfield的第一响应者状态就会取消，然后键盘就消失了。
        [_textPwd resignFirstResponder];
    }
}

@end

//效果

 

监听键盘弹出或消失消息 

//键盘弹出

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyBoardChanged:) name:UIKeyboardWillChangeFrameNotification object:nil];

//键盘消失

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyBoardWillHide:) name:UIKeyboardWillHideNotification object:nil];

//监听键盘弹出方法
-(void)keyBoardChanged:(NSNotification *)notification{
    //UIKeyboardFrameEndUserInfoKey  将要变化的大小
    CGRect keyBoardRect=[notification.userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];
    keyBoardHeight=keyBoardRect.size.height;//获取弹出键盘高度
   //键盘弹出时间
　  NSTimeInterval time=[notification.userInfo[UIKeyboardAnimationDurationUserInfoKey] doubleValue];
　　//下面可以做文本输入框坐标改变动画，与键盘弹出耗费时间一致(体验比较好)
    [UIView animateWithDuration:time animations:^{
        //self.view.frame=changeFrame;
    }];
}

//监听键盘消失方法
-(void)keyBoardWillHide:(NSNotification *)notification{
　　//键盘弹出时间
    NSTimeInterval time=[notification.userInfo[UIKeyboardAnimationDurationUserInfoKey] doubleValue];
   //下面可以做文本输入框坐标改变动画，与键盘弹出耗费时间一致(体验比较好)
    [UIView animateWithDuration:time animations:^{
        //self.view.frame=changeFrame;
    }];
}

  

UITextField和UITableView自定义下拉列表框

//效果图：

//DownboxViewController.h文件

#import <UIKit/UIKit.h>
#import "CommboxView.h"
 
@interface DownboxViewController : UIViewController
@property (nonatomic,strong) CommboxView *cbView;
@

//DownboxViewController.m文件

#import "DownboxViewController.h"
@interface DownboxViewController ()

@end

@implementation DownboxViewController
- (void)viewDidLoad {
    [super viewDidLoad];
    [self.view setBackgroundColor:[UIColor whiteColor]];
    
    //1、创建视图
    CGFloat yyX = 40;
    CGFloat yyY = 40;
    CGFloat yyW = self.view.frame.size.width-80;
    CGFloat yyH = 100;
    CommboxView *yy = [[CommboxView alloc] initWithFrame:CGRectMake(yyX, yyY, yyW, yyH)];
    

    //2、完成布局
    [self.view addSubview:yy];
    
    //3、赋值成员变量
    self.cbView = yy;
    self.cbView.textField.placeholder=@"请选择";
 
   //设置数据
   self.cbView.tbArray=[[NSArray alloc] initWithObjects:@"风继续吹",@"真的爱你",@"透明的你",@"爱的太迟",@"Dear friends",@"永远不回头", nil];
}

//结束触摸时,隐藏下拉列表框
-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{
    //isExclusiveTouch一个布尔值来指示接收机处理触摸事件。
    //没有触摸_textUser进入if内操作
    if (![self.cbView.textField isExclusiveTouch]) {
        //resignFirstResponder取消第一响应者状态的。如果对textfield使用的话，那么调用这个方法，textfield的第一响应者状态就会取消，然后键盘就消失了。
        [self.cbView.textField resignFirstResponder];
        self.cbView.tbView.hidden=YES;
        //设置右边view
        self.cbView.textField.rightView=[[UIImageView alloc] initWithImage:[UIImage imageNamed:@"login_textfield_more@2x.png"]];
    }
}
@end

//CommboxView.h文件

#import <UIKit/UIKit.h>
@interface CommboxView : UIView<UITableViewDataSource,UITableViewDelegate,UITextFieldDelegate>
@property (nonatomic,strong) UITableView *tbView;//用作显示下拉列表框
@property (nonatomic,strong) NSArray *tbArray;//用作下拉列表框的数据
@property (nonatomic,strong) UITextField *textField;//文本框
@end

//CommboxView.m文件

#import "CommboxView.h"
@implementation CommboxView
- (instancetype)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if ( self )
    {
        //1、创建视图
        CGFloat yyX = 0;
        CGFloat yyY = 0;
        CGFloat yyW = frame.size.width;
        CGFloat yyH = frame.size.height/2.5;
        UITextField *uiText=[[UITextField alloc] initWithFrame:CGRectMake(yyX, yyY, yyW, yyH)];
        [uiText.layer setCornerRadius:5.0 ];
        [uiText.layer setBorderWidth:1.0];
        //完成布局
        [self addSubview:uiText];
        uiText.delegate=self;
        //设置右边view
        uiText.rightView=[[UIImageView alloc] initWithImage:[UIImageimageNamed:@"login_textfield_more@2x.png"]];
        //设置右边样式总是显示
        uiText.rightViewMode = UITextFieldViewModeAlways;
        //赋值成员变量
        self.textField=uiText;
        //创建视图
        UITableView *uiTable=[[UITableView alloc] initWithFrame:CGRectMake(yyX, yyH, yyW, frame.size.height-yyY)];
        uiTable.backgroundColor=[UIColor grayColor];
        //分割线颜色
        uiTable.separatorColor=[UIColor lightGrayColor];
        [uiTable.layer setCornerRadius:5.0];
        //完成布局
        [self addSubview:uiTable];
        uiTable.dataSource=self;
        uiTable.delegate=self;
        uiTable.hidden=YES;
        //赋值成员变量
        self.tbView=uiTable;
    }
    return self;
}
 
//选中单元格操作
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath*)indexPath{
    self.textField.text=[_tbArray objectAtIndex:indexPath.row];
    [self.textField resignFirstResponder];
    self.tbView.hidden=YES;
    //设置右边view
    self.textField.rightView=[[UIImageView alloc] initWithImage:[UIImageimageNamed:@"login_textfield_more@2x.png"]];
}

//开始编辑文本框时将下拉列表显示
-(void)textFieldDidBeginEditing:(UITextField *)textField{
      //取消第一响应者状态，可以到达无焦点，不弹出键盘的效果
      [self.textField resignFirstResponder];
    self.tbView.hidden=NO;
    //设置右边view
    self.textField.rightView=[[UIImageView alloc] initWithImage:[UIImageimageNamed:@"login_textfield_more_flip@2x.png"]];
}

//设置单元格宽度
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath*)indexPath{
    return self.textField.frame.size.height*0.8;
}

//每个分区多少行
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    return self.tbArray.count;
 }


//设置单元格
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    static NSString *cellDo=@"cellDo";
    UITableViewCell *cell=(UITableViewCell *)[tableView dequeueReusableCellWithIdentifier:cellDo];
    if (!cell) {
        cell=[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefaultreuseIdentifier:cellDo];
    }
    [[cell textLabel] setText:[_tbArray objectAtIndex:indexPath.row]];
    cell.backgroundColor=[UIColor grayColor];
    return  cell;
}
@end

使用UIPickerView在UITextField实现滚动选择

//  PickerTestViewController.m文件

//
//  PickerTestViewController.m
//  
//
//  Created by Vie on 15/10/12.
//
//
 

#import "PickerTestViewController.h"
@interface PickerTestViewController ()<UIPickerViewDelegate,UIPickerViewDataSource>
@property(nonatomic,strong)UIPickerView *pickerView;
@property(nonatomic,strong)UITextField *txField;
@property(nonatomic,strong)NSMutableArray *yearArray,*monthArray,*dayArray;
@end

@implementation PickerTestViewController
- (void)viewDidLoad {
    [super viewDidLoad];
    [self.view setBackgroundColor:[UIColor whiteColor]];
  
    self.yearArray=[[NSMutableArray alloc] initWithObjects:@"2013",@"2014",@"2015", nil];

    self.monthArray=[[NSMutableArray alloc] initWithObjects:@"1",@"2",@"3",@"4",@"5", nil];

    self.dayArray=[[NSMutableArray alloc] initWithObjects:@"1",@"2",@"3",@"4",@"5",@"6",@"7",@"8", nil];

    self.pickerView=[[UIPickerView alloc] init];
    self.pickerView.dataSource=self;
    self.pickerView.delegate=self;
  
    self.txField=[[UITextField alloc] initWithFrame:CGRectMake(self.view.frame.size.width*0.1f, 100, self.view.frame.size.width*0.8f, 44)];
    self.txField.layer.borderWidth=1.0f;
    self.txField.layer.cornerRadius=5.0f;
    [self.view addSubview:self.txField];
    //设置输入框的弹出视图为UIPickerView
    self.txField.inputView=self.pickerView;
}

//用户选中某个row时，对应改变文本
-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{
    [self setTxFieldText];
}

//结束文本框触摸时隐藏UIPickerView
-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{
    if (![self.txField  isExclusiveTouch]) {
        [self.txField resignFirstResponder];
        [self setTxFieldText];
    }
}

//将文本框的内容设置为滚动表格选中值
-(void)setTxFieldText{
    self.txField.text=[NSString stringWithFormat:@"%@-%@-%@",[self.yearArrayobjectAtIndex:[self.pickerView selectedRowInComponent:0]],[self.monthArrayobjectAtIndex:[self.pickerView selectedRowInComponent:1]],[self.dayArrayobjectAtIndex:[self.pickerView selectedRowInComponent:2]]];
}

//指定UIPickerView上的文本
-(NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component{
    NSString *str;
    if (component==0) {
        str=[self.yearArray objectAtIndex:row];
    }else if (component==1){
        str=[self.monthArray objectAtIndex:row];
    }else{
        str=[self.dayArray objectAtIndex:row];
    }
    return str;
}

//返回每个轮最大的行数。
-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component{
    if (component==0) {
        return self.yearArray.count;
    }else if (component==1){
        return self.monthArray.count;
    }else{
        return self.dayArray.count;
    }
}

//返回一个整数，表示列数
-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{
    return 3;
}
@end

 使用UIDatePicker在UITextField实现日期选择

//DatePickerViewController.h文件

//
//  DatePickerViewController.h
//  
//
//  Created by Vie on 15/10/12.
//
//

#import <UIKit/UIKit.h>
@interface DatePickerViewController : UIViewController
 
@end

//DatePickerViewController.m文件

//
//  DatePickerViewController.m
//  
//
//  Created by Vie on 15/10/12.
//
//
#import "DatePickerViewController.h"

@interface DatePickerViewController ()
@property(nonatomic,strong)UITextField *txField;
@property(nonatomic,strong)UIDatePicker *datePicker;
@end
 
@implementation DatePickerViewController
- (void)viewDidLoad {
    [super viewDidLoad];
    [self.view setBackgroundColor:[UIColor whiteColor]];   
 
    self.txField=[[UITextField alloc] initWithFrame:CGRectMake(self.view.frame.size.width*0.1f, 100, self.view.frame.size.width*0.8f, 44)];
    self.txField.layer.borderWidth=1.0f;
    self.txField.layer.cornerRadius=5.0f;
    self.txField.placeholder=@"选择日期";
    [self.view addSubview:self.txField];

    self.datePicker=[[UIDatePicker alloc] init];
    //设置日期选取器模式
    self.datePicker.datePickerMode=UIDatePickerModeDate;
    //默认根据手机本地设置来显示为中文还是其他语言
    NSLocale *locale=[[NSLocale alloc] initWithLocaleIdentifier:@"zh_CN"];//设置为中文显示
    self.datePicker.locale=locale;
    //设置日期范围
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat: @"yyyy-MM-dd"];
    NSDate *minDate= [dateFormatter dateFromString:@"1970-01-01"];
    NSDate *maxDate=[dateFormatter dateFromString:@"2030-12-31"];
    self.datePicker.minimumDate=minDate;
    self.datePicker.maximumDate=maxDate;
    //设置响应事件
    [self.datePicker addTarget:self action:@selector(pickerValueChanged) forControlEvents:UIControlEventValueChanged];
    
    [self.txField setInputView:self.datePicker];
}

//结束文本框触摸时隐藏UIPickerView
-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{
    if (![self.txField  isExclusiveTouch]) {
        [self.txField resignFirstResponder];
        [self setTxFieldText];
    }
}
 
//选择器改变时，对应改变文本框内容
-(void)pickerValueChanged{
    [self setTxFieldText];
}

//设置文本框内容
-(void)setTxFieldText{
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    [dateFormatter setDateFormat: @"yyyy-MM-dd"];
    NSString *dateString=[dateFormatter stringFromDate:self.datePicker.date];
    self.txField.text=dateString;
}
@end

设置文本输入框样式

    //图片验证码输入
    self.imgLable=[[UILabel alloc] initWithFrame:CGRectMake(0, 0, telLableWidth, telLableHeight)];
    self.imgLable.text=@"验证码";
    self.imgLable.textColor=[UIColor blackColor];
    self.imgLable.numberOfLines=0;
    self.imgLable.textAlignment=NSTextAlignmentCenter;
    self.imgLable.font=[UIFont fontWithName:@"Arial" size:18.0f];
UIView *imgBgView=[[UIView alloc] initWithFrame:CGRectMake(0, 0, 95, 40)];
    self.codeImgView=[[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 80, 38)];
    self.codeImgView.center=imgBgView.center;
    self.codeImgView.backgroundColor=[UIColor grayColor];
    [imgBgView addSubview:self.codeImgView];
 
    float imgCodeFielY=statusHeight+navHeight+30+self.telLable.frame.size.height;
    self.imgCodeField=[[UITextField alloc] initWithFrame:CGRectMake(0, imgCodeFielY, telFieldWidth, telLableHeight)];
    self.imgCodeField.placeholder=@"输入图片验证码";
    [self.imgCodeField setBorderStyle:UITextBorderStyleRoundedRect];
    //设置输入框左边视图
    self.imgCodeField.leftView=self.imgLable;
    self.imgCodeField.leftViewMode=UITextFieldViewModeAlways;

    //设置输入框右边视图
    self.imgCodeField.rightView=imgBgView;
    self.imgCodeField.rightViewMode=UITextFieldViewModeAlways;
    self.imgCodeField.tag=102;
    self.imgCodeField.delegate=self;
    self.imgCodeField.keyboardType=UIKeyboardTypeEmailAddress;
    [self.view addSubview:self.imgCodeField];

 

实现带文本输入的UIAlertView弹窗

   UIAlertView *alerView=[[UIAlertView alloc] initWithTitle:@"请输入账户密码" message:nil delegate:self cancelButtonTitle:@"确定" otherButtonTitles:nil];
    [alerView setAlertViewStyle:UIAlertViewStyleLoginAndPasswordInput];

    UITextField *accountField=[alerView textFieldAtIndex:0];
    accountField.placeholder=@"请输入账户";

    UITextField *pwdField=[alerView textFieldAtIndex:1];
    pwdField.placeholder=@"请输入密码";
    [alerView show];

   

-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
    NSLog(@"账号：%@;密码：%@",[alertView textFieldAtIndex:0].text,[alertView textFieldAtIndex:1].text);
}