IOS UI 第六篇：基本UI

加两个UI模块

- (void)viewDidLoad
{
    [self begin1];
    [self begin2];
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
}

-(void)begin1{
    UIActivityIndicatorView *viView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
    viView.center = CGPointMake(160, 300);
    viView.color = [UIColor blueColor];
    viView.hidesWhenStopped = NO;
    [viView startAnimating];
    [viView stopAnimating];
    [self.view addSubview:viView];
}

-(void)begin2{
    UISwitch *mySwitch = [[UISwitch alloc] initWithFrame:CGRectMake(100, 100, 200, 50)];
    mySwitch.onTintColor = [UIColor redColor];
    mySwitch.on = NO;
    [mySwitch setOn:YES animated:YES];
    [mySwitch addTarget:self action:@selector(onButton:) forControlEvents:UIControlEventValueChanged];
    [self.view addSubview:mySwitch];
}

-(void)onButton:(id)sender{
    NSLog(@":::%@", sender);
    UISwitch *sw = sender;
    if(sw.on) NSLog(@"ON");
    else NSLog(@"OFF");
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

TextField 限制密码数目：

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string{

    if(textField.text.length >= 6 && !range.length)
        return NO;
    return YES;
}

有多个TextField 则限制所指定的数目：

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string{
    NSLog(@"%d-%d-%d",range.length, range.location, textField.text.length);
    if (textField == self.nameTextField) {
        if(textField.text.length >= 6 && !range.length)
            return NO;
        return YES;
    }
    if (textField == self.passwordTextField){
        if(textField.text.length >= 4 && !range.length)
            return NO;
        return YES;
    }
    return YES;
}

手势：

添加手势：

UITapGestureRecognizer *tapGR;//添加单击手势

tapGR=[[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(onTap:)];

[self.view addGestureRecognizer:tapGR];

[self.view removeGestureRecognizer:tapGR];

-(void)onTap:(id)sender{
    //将输入框取消第一响应者，键盘就睡自动收回
    [self.nameTextField resignFirstResponder];
    [self.passwordTextField resignFirstResponder];
}

-(void)dealloc{
//在销毁的时候将自己在通知中心中移除
[[NSNotificationCenter defaultCenter]removeObserver:self];
}

- (BOOL)textFieldShouldReturn:(UITextField *)textField{
    NSLog(@"textFiled 键盘的return键被点击");
    [textField resignFirstResponder];
    NSLog(@"开始搜索！！！");
    return YES;
}

自己做一个小调色板（红色、蓝色、绿色、透明度）：如图

代码：

@interface ViewController ()

@property (strong, nonatomic) IBOutlet UIView *subView;
@property (nonatomic, assign)float red;
@property (nonatomic, assign)float blue;
@property (nonatomic, assign)float green;
@property (nonatomic, assign)float alpha;
@property (weak, nonatomic) IBOutlet UILabel *redLabel;
@property (weak, nonatomic) IBOutlet UILabel *greenLabel;
@property (weak, nonatomic) IBOutlet UILabel *blueLabel;
@property (weak, nonatomic) IBOutlet UILabel *alphaLabel;

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    _redLabel.text = [NSString stringWithFormat:@"%%50"];
    _blueLabel.text = [NSString stringWithFormat:@"%%50"];
    _greenLabel.text = [NSString stringWithFormat:@"%%50"];
    _alphaLabel.text = [NSString stringWithFormat:@"%%50"];
    _red = _green = _blue = _alpha = 0.5;
    self.subView.backgroundColor = [UIColor colorWithRed:_red green:_green blue:_blue alpha:_alpha];
// Do any additional setup after loading the view, typically from a nib.
    UISlider *slide = [[UISlider alloc] initWithFrame:CGRectMake(10, 300, 300, 60)];
    slide.minimumValue = 0;
    slide.maximumValue = 1;
    [slide setValue:0.5 animated:YES];
    [slide addTarget:self action:@selector(onSliderChange:) forControlEvents:UIControlEventValueChanged];
    //[self.view addSubview:slide];

}

-(void)onSliderChange:(id)sender{
    NSLog(@"slider:%@", sender);
    UISlider *slider = sender;
    self.subView.alpha = slider.value;
}
- (IBAction)blueSlider:(id)sender {

    UISlider *slider = sender;
    _blue = slider.value;
    _blueLabel.text = [NSString stringWithFormat:@"%%%.0lf", slider.value*100];
    self.subView.backgroundColor = [UIColor colorWithRed:_red green:_green blue:_blue alpha:_alpha];
}

- (IBAction)greenSlider:(id)sender {
    UISlider *slider = sender;
    _green = slider.value;
    _greenLabel.text = [NSString stringWithFormat:@"%%%.0lf", slider.value*100];
    self.subView.backgroundColor = [UIColor colorWithRed:_red green:_green blue:_blue alpha:_alpha];
}
- (IBAction)redSlider:(id)sender {
    UISlider *slider = sender;
    _red = slider.value;
    _redLabel.text = [NSString stringWithFormat:@"%%%.0lf", slider.value*100];
    self.subView.backgroundColor = [UIColor colorWithRed:_red green:_green blue:_blue alpha:_alpha];
}
- (IBAction)alphaSlider:(id)sender {
    UISlider *slider = sender;
    _alpha = slider.value;
    _alphaLabel.text = [NSString stringWithFormat:@"%%%.0lf", slider.value*100];
    self.subView.backgroundColor = [UIColor colorWithRed:_red green:_green blue:_blue alpha:_alpha];
}

按钮开关相应事件：

触摸方法：

@implementation QFViewController{
    UIView *redView;
    CGPoint beginPoint;
    BOOL canMove;
    BOOL mark;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
redView=[[UIView alloc]initWithFrame:CGRectMake(-320, 0, 320, 480)];
    redView.backgroundColor=[UIColor redColor];
    [self.view addSubview:redView];
    mark = 0;
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}
#pragma mark--
#pragma mark touch事件

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{

    //任意取出一个touch对象
    UITouch *touch = touches.anyObject;
    beginPoint = [touch locationInView:self.view];
    NSLog(@"mark = %d", mark);
    if(mark == 0){
        if (beginPoint.x<20) {
            canMove=YES;
        }else{
            canMove=NO;
        }
    }
    if(mark){
        if (beginPoint.x]]]]>300) {
            canMove=YES;
        }else{
            canMove=NO;
        }
    }
    NSLog(@"触摸开始 %f,%f---",beginPoint.x,beginPoint.y);
}
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{

    UITouch *touch = touches.anyObject;
    CGPoint movePoint = [touch locationInView:self.view];
    NSLog(@"触摸滑动 %f",movePoint.x-beginPoint.x);

    if (canMove && mark == 0) {
        redView.frame=CGRectMake(-320+movePoint.x-beginPoint.x, 0, 320, 480);
    }
    if( canMove && mark == 1){
        redView.frame=CGRectMake(movePoint.x - 320 , 0, 320, 480);
    }

}
-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{

    NSLog(@"触摸结束");
    UITouch *touch = touches.anyObject;
    CGPoint endPoint = [touch locationInView:self.view];
    if(mark == 0){
        if ((endPoint.x-beginPoint.x)>200) {
            [UIView animateWithDuration:0.25 animations:^{
                redView.frame=CGRectMake(0, 0, 320, 480);
            }];
            mark = 1;

        }else{
            [UIView animateWithDuration:0.25 animations:^{
                redView.frame=CGRectMake(-320, 0, 320, 480);
            }];

        }
    }
    else if(mark == 1){
        NSLog(@"duanyulei");
        if ((320 - endPoint.x)<20) {
            [UIView animateWithDuration:0.25 animations:^{
                redView.frame=CGRectMake(-320, 0, 320, 480);
            }];
            mark = 0;

        }else{
            [UIView animateWithDuration:0.25 animations:^{
                redView.frame=CGRectMake(0, 0, 320, 480);
            }];

        }
    }

}
-(void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event{
    NSLog(@"触摸取消");
}

警告和通知：

@interface QFViewController ()<UIAlertViewDelegate,UIActionSheetDelegate]]]]>
- (IBAction)showAlertView:(id)sender;
@property (weak, nonatomic) IBOutlet UIButton *showActionSheet;
- (IBAction)showActionSheet:(id)sender;

@end

@implementation QFViewController{
    UIAlertView *alertView;
    UIActionSheet *actionSheet;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
alertView=[[UIAlertView alloc]initWithTitle:@"通知" message:@"明天礼拜五了，大家晚上多多努力，争取在放假前把项目上架。" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"确定",nil,nil];

    actionSheet=[[UIActionSheet alloc]initWithTitle:@"你确定删除么？" delegate:self cancelButtonTitle:@"取消" destructiveButtonTitle:@"确定" otherButtonTitles:@"其他", nil];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (IBAction)showAlertView:(id)sender {
    [alertView show];
}
- (IBAction)showActionSheet:(id)sender {
    [actionSheet showInView:self.view];
}
#pragma mark--
#pragma mark UIAlertView代理方法
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
    NSLog(@"点击了第%d个按键",buttonIndex);
    switch (buttonIndex) {
        case 0:

            break;

        default:
            break;
    }
}
- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex{
    NSLog(@"点击了第%d个按键",buttonIndex);
    switch (buttonIndex) {
        case 0:

            break;

        default:
            break;
    }
}