将颜色合成图片
将颜色合成图片
+(UIImage *)imageWithColor:(UIColor *)color
{
CGRect rect = CGRectMake(0.0f, 0.0f, 1.0f, 1.0f);
UIGraphicsBeginImageContext(rect.size);
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSetFillColorWithColor(context, [color CGColor]);
CGContextFillRect(context, rect);
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
navigationController 设置title 颜色
[self.navigationController.navigationBar setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:
[UIColor whiteColor], UITextAttributeTextColor,
nil, UITextAttributeTextShadowColor,
[NSValue valueWithUIOffset:UIOffsetMake(0, 0)], UITextAttributeTextShadowOffset,
[UIFont fontWithName:@"Arial-Bold" size:0.0], UITextAttributeFont,
nil]];
设置全局navigation barbuttonitem
#pragma mark 设置全局navigation barbuttonitem
-(void)setNaviBarButtonItemImage:(NSString *)imageName andX:(NSInteger)x andY:(NSInteger)y andW:(NSInteger)w andH:(NSInteger)h andTitle:(NSString *)title andSel:(SEL)sel andLOrR:(NSString *)lOr andTitleColor:(UIColor *)color{
UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
btn.frame =CGRectMake(x,y,w,h);
[btn setTitle:title forState:UIControlStateNormal];
if (imageName.length==0 && title.length==0) {
} else if (imageName.length==0 && title.length!=0) {
[btn setBackgroundColor:[UIColor clearColor]];
[btn setTitleColor:color forState:UIControlStateNormal];
}else if(imageName.length!=0 && title.length==0){
UIImage *image = [UIImage imageNamed:imageName];
[btn setImage:image forState:UIControlStateNormal];
}else if(imageName.length!=0 && title.length!=0){
UIImage *image = [UIImage imageNamed:imageName];
[btn setBackgroundImage:image forState:UIControlStateNormal];
[btn setBackgroundColor:[UIColor clearColor]];
[btn setTitleColor:color forState:UIControlStateNormal];
}
[btn addTarget: self action:sel forControlEvents: UIControlEventTouchUpInside];
UIBarButtonItem *bBtn = [[UIBarButtonItem alloc]initWithCustomView:btn];
if ([lOr isEqualToString:@"left"]) {
[self.navigationItem setLeftBarButtonItem:bBtn];
}else{
[self.navigationItem setRightBarButtonItem:bBtn];
}
}
设置导航条标题的颜色
[navigationController.navigationBar setTitleTextAttributes:@{NSForegroundColorAttributeName : [UIColor whiteColor]}];
计算文字的Size
/**
* 计算文字尺寸
* @param text 需要计算尺寸的文字
* @param font 文字的字体
* @param maxSize 文字的最大尺寸
*/
- (CGSize)sizeWithText:(NSString *)text font:(UIFont *)font maxSize:(CGSize)maxSize
{
NSDictionary *attrs = @{NSFontAttributeName : font};
return [text boundingRectWithSize:maxSize options:NSStringDrawingUsesLineFragmentOrigin attributes:attrs context:nil].size;
}
两种方法删除NSUserDefaults所有记录
//方法一
NSString *appDomain = [[NSBundle mainBundle] bundleIdentifier];
[[NSUserDefaults standardUserDefaults] removePersistentDomainForName:appDomain];
//方法二
- (void)resetDefaults {
NSUserDefaults * defs = [NSUserDefaults standardUserDefaults];
NSDictionary * dict = [defs dictionaryRepresentation];
for (id key in dict) {
[defs removeObjectForKey:key];
}
[defs synchronize];
}
设置Label行间距
设置label的行间距，计算高度
-(void)fuwenbenLabel:(UILabel *)labell FontNumber:(id)font AndLineSpacing:(float)lineSpacing
{
//富文本设置文字行间距
NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc]init];
paragraphStyle.lineSpacing = lineSpacing;
NSDictionary *attributes = @{ NSFontAttributeName:font, NSParagraphStyleAttributeName:paragraphStyle};
labell.attributedText = [[NSAttributedString alloc]initWithString:labell.text attributes:attributes];
}
//获取设置文本间距以后的高度
CGRect huiDaSize = [cell.fabiaoHuifuContentLabel.attributedText boundingRectWithSize:CGSizeMake(276, MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin context:nil];
一行代码创建AlertView，支持多个参数
一行代码创建AlertView，支持多个参数
//
// UIAlertView+Additions.h
//
//
// Created by Jueying on 15/1/15.
// Copyright (c) 2015年 Jueying. All rights reserved.
//
#import <UIKit/UIKit.h>
typedef void(^UIAlertViewCallBackBlock)(NSInteger buttonIndex);
@interface UIAlertView (Additions) <UIAlertViewDelegate>
@property (nonatomic, copy) UIAlertViewCallBackBlock alertViewCallBackBlock;
+ (void)alertWithCallBackBlock:(UIAlertViewCallBackBlock)alertViewCallBackBlock title:(NSString *)title message:(NSString *)message cancelButtonName:(NSString *)cancelButtonName otherButtonTitles:(NSString *)otherButtonTitles, ...;
@end
//
// UIAlertView+Additions.m
//
//
// Created by Jueying on 15/1/15.
// Copyright (c) 2015年 Jueying. All rights reserved.
//
#import "UIAlertView+Additions.h"
#import <objc/runtime.h>
static void* UIAlertViewKey = @"UIAlertViewKey";
@implementation UIAlertView (Additions)
+ (void)alertWithCallBackBlock:(UIAlertViewCallBackBlock)alertViewCallBackBlock title:(NSString *)title message:(NSString *)message cancelButtonName:(NSString *)cancelButtonName otherButtonTitles:(NSString *)otherButtonTitles, ... {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:title message:message delegate:nil cancelButtonTitle:cancelButtonName otherButtonTitles: otherButtonTitles, nil];
NSString *other = nil;
va_list args;
if (otherButtonTitles) {
va_start(args, otherButtonTitles);
while ((other = va_arg(args, NSString*))) {
[alert addButtonWithTitle:other];
}
va_end(args);
}
alert.delegate = alert;
[alert show];
alert.alertViewCallBackBlock = alertViewCallBackBlock;
}
- (void)setAlertViewCallBackBlock:(UIAlertViewCallBackBlock)alertViewCallBackBlock {
[self willChangeValueForKey:@"callbackBlock"];
objc_setAssociatedObject(self, &UIAlertViewKey;, alertViewCallBackBlock, OBJC_ASSOCIATION_COPY);
[self didChangeValueForKey:@"callbackBlock"];
}
- (UIAlertViewCallBackBlock)alertViewCallBackBlock {
return objc_getAssociatedObject(self, &UIAlertViewKey;);
}
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
if (self.alertViewCallBackBlock) {
self.alertViewCallBackBlock(buttonIndex);
}
}
@end
一段文字设置多种字体颜色
给定range和需要设置的颜色，就可以给一段文字设置多种不同的字体颜色，使用方法如下:
[self fuwenbenLabel:contentLabel FontNumber:[UIFont systemFontOfSize:15] AndRange:NSMakeRange(6, 1) AndColor:RGBACOLOR(34, 150, 253, 1)];
//设置不同字体颜色
-(void)fuwenbenLabel:(UILabel *)labell FontNumber:(id)font AndRange:(NSRange)range AndColor:(UIColor *)vaColor
{
NSMutableAttributedString *str = [[NSMutableAttributedString alloc] initWithString:labell.text];
//设置字号
[str addAttribute:NSFontAttributeName value:font range:range];
//设置文字颜色
[str addAttribute:NSForegroundColorAttributeName value:vaColor range:range];
labell.attributedText = str;
}
隐藏状态栏
-(void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
[[UIApplication sharedApplication] setStatusBarHidden:NO];
}
-(void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
[[UIApplication sharedApplication] setStatusBarHidden:YES];
}
ScaleTableView-头部图片可伸缩的TableView
很多社交App中都有这样的设计。 列表顶部是一张大图，大图可以随着列表的下拉而放大。本Demo实现了这个功能。
//
// ViewController.m
// ScaleTableView
//
// Created by ShawnPan on 15/3/25.
// Mail : developerpans@163.com
// Copyright (c) 2015年 ShawnPan. All rights reserved.
//
#import "ViewController.h"
#define Imgwidth 828
#define Imgheight 589
#define ScaleImageViewHeight ([UIScreen mainScreen].bounds.size.width*Imgheight/Imgwidth)
@interface ViewController ()<UITableViewDelegate,UITableViewDataSource,UIScrollViewDelegate>
@property (strong, nonatomic) IBOutlet UIImageView *scaleImageView;
@property (weak, nonatomic) IBOutlet UITableView *tableView;
@property (strong, nonatomic) IBOutlet UIImageView *noScaleImage;
@property (strong, nonatomic) IBOutlet UILabel *nicknameLabel;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.tableView.delegate = self;
self.tableView.dataSource = self;
}
- (void)viewWillAppear:(BOOL)animated
{
self.tableView.contentInset = UIEdgeInsetsMake(ScaleImageViewHeight, 0, 0, 0);
self.scaleImageView.frame = CGRectMake(0, -ScaleImageViewHeight, self.view.frame.size.width, ScaleImageViewHeight);
[self.tableView addSubview:self.scaleImageView];
self.noScaleImage.frame = CGRectMake(20, -50, 48, 48);
[self.tableView addSubview:self.noScaleImage];
self.nicknameLabel.frame = CGRectMake(88, -42, 80, 30);
[self.tableView addSubview:self.nicknameLabel];
}
#pragma - mark UIScrollView Delegate
- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
CGFloat y = scrollView.contentOffset.y;
if (y < -ScaleImageViewHeight)
{
CGRect frame = self.scaleImageView.frame;
frame.size.height = -y;
frame.origin.y = y;
self.scaleImageView.frame = frame;
}
}
#pragma - mark UITableView DataSource
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return 20;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell"];
cell.textLabel.text = [@(indexPath.row) stringValue];
return cell;
}
@end
//将状态栏文字颜色变成黑色
-(void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
if (is_IOS_7) {//更改时间颜色
[[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent animated:NO];
}
}
-(void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
if (is_IOS_7) {//更改时间颜色
[[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleDefault];
}
}
在tabbar上添加小红点
在tabbar上添加类似于badgevalue功能的小红点。
只需要知道tabbar的下标
使用- (void)showBadgeOnItemIndex:(int)index
和 - (void)hideBadgeOnItemIndex:(int)index进行显示和隐藏
使用方法如下：[self.tabBarController.tabBar showBadgeOnItemIndex:0];
#import "UITabBar+badge.h"
#define TabbarItemNums 4.0 //tabbar的数量
@implementation UITabBar (badge)
- (void)showBadgeOnItemIndex:(int)index{
[self removeBadgeOnItemIndex:index];
UIView *badgeView = [[UIView alloc]init];
badgeView.tag = 888 + index;
badgeView.layer.cornerRadius = 5;
badgeView.backgroundColor = [UIColor redColor];
CGRect tabFrame = self.frame;
float percentX = (index +0.6) / TabbarItemNums;
CGFloat x = ceilf(percentX * tabFrame.size.width);
CGFloat y = ceilf(0.1 * tabFrame.size.height);
badgeView.frame = CGRectMake(x, y, 10, 10);
[self addSubview:badgeView];
}
- (void)hideBadgeOnItemIndex:(int)index{
[self removeBadgeOnItemIndex:index];
}
- (void)removeBadgeOnItemIndex:(int)index{
for (UIView *subView in self.subviews) {
if (subView.tag == 888+index) {
[subView removeFromSuperview];
}
}
}
@end
获取一个类的所有子类
通过objc_copyClassList获取所有类，并通过class_getSuperclass来判断那类型继承于该类
+ (NSArray *) allSubclasses
{
Class myClass = [self class];
NSMutableArray *mySubclasses = [NSMutableArray array];
unsigned int numOfClasses;
Class *classes = objc_copyClassList(&numOfClasses;);
for (unsigned int ci = 0; ci < numOfClasses; ci++) {
Class superClass = classes[ci];
do {
superClass = class_getSuperclass(superClass);
} while (superClass && superClass != myClass);
if (superClass)
[mySubclasses addObject: classes[ci]];
}
free(classes);
return mySubclasses;
}
类似广告的文字循环滚动
-(void)viewDidLoad
{
timer = [[NSTimer alloc] init];
mainsco = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 0, 0)];
mainsco.backgroundColor = [UIColor clearColor];
[bgView addSubview:mainsco];
//显示广告内容
noticeLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 0, 0)];
noticeLabel.numberOfLines = 0;
noticeLabel.font = [UIFont systemFontOfSize:13.0f];
noticeLabel.backgroundColor = [UIColor clearColor];
[mainsco addSubview:noticeLabel];
noticeLabel.text =[dic valueForKey:@"Bulletin"];
noticeSize = [ [dic valueForKey:@"Bulletin"] sizeWithFont:[UIFont systemFontOfSize:13.0f] constrainedToSize:CGSizeMake(180, 20000000)];
//所有文字显示在一行所占的高度
size1 = [[dic valueForKey:@"Bulletin"] sizeWithFont:[UIFont systemFontOfSize:13.0f]];
mainsco.contentSize = CGSizeMake(180, noticeSize.height);
mainsco.showsVerticalScrollIndicator = NO;
／／根据文字的多少设置label的宽高,但底层的scrollview只显示一行内容的高度
noticeLabel.frame = CGRectMake(0, 0, 180, noticeSize.height);
mainsco.frame =CGRectMake(116, 77, 180, size1.height);
if (noticeSize.height>size1.height)
{
//如果文字大于一行就开始滚动，否则停止timer
timer = [NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(time) userInfo:self repeats:YES];
}else{
[timer invalidate];
}
｝
//滚动的方法
-(void)time
{
//oldy用来记录上一次scrollview滚动的位置
mainsco.contentOffset = CGPointMake(0, oldy);
if (oldy>noticeSize.height-1) {
oldy = 0;
}else
oldy++;／／设置每次滚动的高度，即几个像素
}
分组列表头部空白处理
在viewWillAppear里面添加如下代码：
//分组列表头部空白处理
CGRect frame = myTableView.tableHeaderView.frame;
frame.size.height = 0.1;
UIView *headerView = [[UIView alloc] initWithFrame:frame];
[myTableView setTableHeaderView:headerView];
阿拉伯数字转化为汉语数字
+(NSString *)translation:(NSString *)arebic
{ NSString *str = arebic;
NSArray *arabic_numerals = @[@"1",@"2",@"3",@"4",@"5",@"6",@"7",@"8",@"9",@"0"];
NSArray *chinese_numerals = @[@"一",@"二",@"三",@"四",@"五",@"六",@"七",@"八",@"九",@"零"];
NSArray *digits = @[@"个",@"十",@"百",@"千",@"万",@"十",@"百",@"千",@"亿",@"十",@"百",@"千",@"兆"];
NSDictionary *dictionary = [NSDictionary dictionaryWithObjects:chinese_numerals forKeys:arabic_numerals];
NSMutableArray *sums = [NSMutableArray array];
for (int i = 0; i < str.length; i ++) {
NSString *substr = [str substringWithRange:NSMakeRange(i, 1)];
NSString *a = [dictionary objectForKey:substr];
NSString *b = digits[str.length -i-1];
NSString *sum = [a stringByAppendingString:b];
if ([a isEqualToString:chinese_numerals[9]])
{
if([b isEqualToString:digits[4]] || [b isEqualToString:digits[8]])
{
sum = b;
if ([[sums lastObject] isEqualToString:chinese_numerals[9]])
{
[sums removeLastObject];
}
}else
{
sum = chinese_numerals[9];
}
if ([[sums lastObject] isEqualToString:sum])
{
continue;
}
}
[sums addObject:sum];
}
NSString *sumStr = [sums componentsJoinedByString:@""];
NSString *chinese = [sumStr substringToIndex:sumStr.length-1];
NSLog(@"%@",str);
NSLog(@"%@",chinese);
return chinese;
}
切割字符串工具。。
字符串~`!@#$%^&*()_-+={}[]|\:;"'<,>.?/ 打印结果为 @"~",@"`",@"!",@"@",@"#",@"$",@"%",@"^",@"&",@"*",@"(",@")",@"_",@"-",@"+",@"=",@"{",@"}",@"[",@"]",@"|",@"",@":",@";",@""",@"'",@"<",@",",@">",@".",@"?",@"/"
// QWERTYUIOPASDFGHJKLZXCVBNM
NSMutableString *str = [NSMutableString stringWithString:@"~`!@#$%^&*()_-+={}[]|\:;"'<,>.?/"];
NSMutableString *dest = [NSMutableString string];
for (int i = 0; i < str.length; i++) {
NSMutableString *head = [NSMutableString stringWithString:@"@""];
NSString *temp = [str substringWithRange:NSMakeRange(i, 1)];
[head appendFormat:@"%@"",temp];
[dest appendFormat:@"%@,",head];
NSLog(@"%d", i);
}
NSLog(@"%@", dest);
仿iOS图标抖动
#import "LHViewController.h"
#define angelToRandian(x) ((x)/180.0*M_PI)
@interface LHViewController ()
@property (strong, nonatomic) IBOutlet UIImageView *imageView;
@end
@implementation LHViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
UILongPressGestureRecognizer* longPress=[[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longPress:)];
[self.imageView addGestureRecognizer:longPress];
}
-(void)longPress:(UILongPressGestureRecognizer*)longPress
{
if (longPress.state==UIGestureRecognizerStateBegan) {
CAKeyframeAnimation* anim=[CAKeyframeAnimation animation];
anim.keyPath=@"transform.rotation";
anim.values=@[@(angelToRandian(-7)),@(angelToRandian(7)),@(angelToRandian(-7))];
anim.repeatCount=MAXFLOAT;
anim.duration=0.2;
[self.imageView.layer addAnimation:anim forKey:nil];
self.btn.hidden=NO;
}
}
- (IBAction)delete:(id)sender {
[self.imageView removeFromSuperview];
[self.btn removeFromSuperview];
}
@end
//修改webView背景色
webView.backgroundColor = [UIColor clearColor];
[webView setOpaque:NO];
//自定义cell实际大小获取
- (void)awakeFromNib {
// Initialization code
}
-(void)drawRect:(CGRect)rect {
// 重写此方法，并在此方法中获取
CGFloat width = self.frame.size.width;
}
//获取网络图片的宽度
headerImageView.contentMode = UIViewContentModeScaleAspectFit;
[headerScrollView addSubview:headerImageView];
int imgWidth = headerImageView.image.size.width;
int imgHight = headerImageView.image.size.height;
int aWidth = headerImageView.image.size.width/headerImageView.frame.size.width;
int LastWidth = imgWidth/aWidth;
int LastHight = imgHight/aWidth;
//视频暂停图片
UIImageView *imageee = [[UIImageView alloc] initWithFrame:CGRectMake((SCREEN_WIDTH-100)/2, (SCREEN_HEIGHT-100)/2, 370/2, 310/2)];
imageee.image = LOAD_IMAGE(@"newhouse_mov_stop");
imageee.center = headerImageView.center;
[headerScrollView addSubview:imageee];
UIButton *movbtn = [[UIButton alloc] initWithFrame:CGRectMake(0+i*SCREEN_WIDTH, 0, LastWidth, LastHight)];
movbtn.backgroundColor = [UIColor clearColor];
movbtn.tag = 400+i;
[movbtn addTarget:self action:@selector(doBoFang:) forControlEvents:UIControlEventTouchUpInside];
movbtn.center = headerImageView.center;
[headerScrollView addSubview:movbtn];
//获取当前屏幕显示的viewcontroller
- (UIViewController *)getCurrentVC
{
UIViewController *result = nil;
UIWindow * window = [[UIApplication sharedApplication] keyWindow];
if (window.windowLevel != UIWindowLevelNormal)
{
NSArray *windows = [[UIApplication sharedApplication] windows];
for(UIWindow * tmpWin in windows)
{
if (tmpWin.windowLevel == UIWindowLevelNormal)
{
window = tmpWin;
break;
}
}
}
UIView *frontView = [[window subviews] objectAtIndex:0];
id nextResponder = [frontView nextResponder];
if ([nextResponder isKindOfClass:[UIViewController class]])
result = nextResponder;
else
result = window.rootViewController;
return result;
}
UILABLE自适应
CGRect rect = [operation boundingRectWithSize:CGSizeMake(SCREEN_WIDTH, MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin attributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIFont systemFontOfSize:13],NSFontAttributeName,nil] context:nil];
Xcode编译错误集锦
1、在将ios项目进行Archive打包时，Xcode提示以下错误：
[BEROR]CodeSign error: Certificate identity ‘iPhone Distribution: ***.’ appears more than once in the keychain. The codesign tool requires there only be one.
原因：那么出现此问题的原因是多个证书之间冲突造成两种解决方法如下：
解决办法：打开mac系统的“实用工具”-“钥匙串访问”-“我的证书”中，会看到有证书名一模一样的，那么请将早期的证书删除掉，重启Xcode；
2、在真机或者模拟器编译程序的时候可能会遇到下面的错误：
Could not change executable permissions on the application.
原因：拥有相同的bundle Identifier已经在设备上运行
解决办法：删除设备中或者模拟器中的App。
3、编译时遇到如下错误：
A valid provisioning profile matching the application's Identifier 'XXXX' could not be found
原因：缺少证书或者是在Code Signing Identity处没有选择对应的证书或者是证书不对应
解决办法：重装证书，检查证书是否是否选择是否对应。
4、编译时遇到如下错误：
ld: library not found for -lmp3lameclang: error: linker command failed with exit code 1 (use -v to see invocation)
原因：一般是多人编辑同一个工程时其中一人没将某个库上传导致的
解决办法：上传具体静态库
//导航栏色调
self.navigationBar.barTintColor = [UIColor colorWithRed:0.01 green:0.05 blue:0.06 alpha:1]; //%%% bartint
self.navigationBar.translucent = NO;
viewControllerArray = [[NSMutableArray alloc]init];
currentPageIndex = 0;
//设置状态栏颜色
-(UIStatusBarStyle)preferredStatusBarStyle{
return UIStatusBarStyleLightContent;
// return UIStatusBarStyleDefault;
}