触摸事件,响应者链和手势

1.触摸事件

#import "ViewController.h"
@interface ViewController ()
@property (strong,nonatomic) UILabel *simple;
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    self.view.backgroundColor = [UIColor whiteColor];
    self.simple = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
    self.simple.center = self.view.center;
    self.simple.backgroundColor = [UIColor magentaColor];
    //设置圆角
    self.simple.layer.cornerRadius = 20;
    self.simple.layer.masksToBounds = YES;
//    self.simple.layer.shadowOffset = CGSizeMake(4, 5);
//    self.simple.layer.shadowColor = [UIColor blackColor].CGColor;
//    self.simple.layer.borderColor = [UIColor magentaColor].CGColor;
//    self.simple.layer.borderWidth = 5;
    [self.view addSubview:self.simple];
}
//开始触摸
-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
#define KWidth self.view.bounds.size.width
#define KHeight self.view.bounds.size.height
#define KMax 300
#define KMin 30   
    self.simple.backgroundColor = [UIColor yellowColor];    
   //随机大小
    CGFloat side = arc4random()%(KMax - KMin + 1) +KMin;
    self.simple.bounds = CGRectMake(0, 0, side, side);
    self.simple.layer.cornerRadius = side / 2;
    self.simple.layer.masksToBounds = YES;
    
    //随机位置
    CGFloat x = arc4random()%(NSInteger)(KWidth - 50 + 1) + 50;
    CGFloat y = arc4random()%(NSInteger)(KHeight - 50 + 1) + 50;
    
    self.simple.center = CGPointMake(x, y);
    
    
    NSLog(@"我要开始摸了");
}
//移动触摸
-(void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
    #define KColor arc4random()% 256/255.0
    self.simple.backgroundColor = [UIColor colorWithRed:KColor green:KColor blue:KColor alpha:1];
    
    //获取触摸设备的对象
    UITouch *touch = [touches anyObject];
    //获取前一个点
    CGPoint p1 = [touch previousLocationInView:self.view];
    //获取当前的点
    CGPoint p2 = [touch locationInView:self.view];
    //根据两个点的纵向距离来计算出移动结果,并复制给center,更新位置
    //self.view.center = CGPointMake(self.view.center.x + p2.x - p1.x, self.view.center.y + p2.y - p1.y);
    
    self.simple.center = CGPointMake(p2.x, p2.y);
    
     NSLog(@"左右摸一摸");
}
//结束触摸
- (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
    //随机颜色
#define KColor arc4random()% 256/255.0
//    self.simple.backgroundColor = [UIColor colorWithRed:KColor green:KColor blue:KColor alpha:1];
    //self.simple.backgroundColor = [UIColor greenColor];
     NSLog(@"哎呀,不摸了");
}
//取消触摸
- (void)touchesCancelled:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
    //这个事件点击屏幕不松手,然后把程序转入后台才会触发,在实际中触发改事件一般有来个电话什么的
     NSLog(@"取消触摸");
}
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

2.响应者链和手势

#import "ViewController.h"

@interface ViewController ()
@property (strong,nonatomic) UIView *simpleView;
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    self.view.backgroundColor = [UIColor redColor];
    self.simpleView = [[UIView alloc] initWithFrame:CGRectMake(100, 100, 200, 200)];
    self.simpleView.backgroundColor = [UIColor magentaColor];
    [self.view addSubview:self.simpleView];
    
    //开启页面交互
    //userInteractionEnabled 是可以中断响应者链的
    //lable imageView是默认关闭的
    self.view.userInteractionEnabled = YES;
    
    UIImageView *image = [[UIImageView alloc] init];
    image.userInteractionEnabled = NO;
    //UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(TapAction:)];
//    //设置点击次数
//    tap.numberOfTapsRequired = 1;
//    //设置手指个数
//    tap.numberOfTouchesRequired = 2;
//    //添加手势控制器到视图上
//    [self.simpleView addGestureRecognizer:tap];
    //长按手势
    UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(LongAction)];
    //设置长按时间
    longPress.minimumPressDuration = 1;
    [self.simpleView addGestureRecognizer:longPress];
    
    //平移手势
    UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panAction:)];
    [self.simpleView addGestureRecognizer:pan];
    
    
    //捏合手势
    UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(PinchAction:)];
    [self.simpleView addGestureRecognizer:pinch];
    
    //旋转手势
    UIRotationGestureRecognizer *rotion = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotionAction:)];
    [self.simpleView addGestureRecognizer:rotion];
    
}
//旋转手势事件
-(void)rotionAction:(UIRotationGestureRecognizer *)rotion
{
    rotion.view.transform = CGAffineTransformMakeRotation(rotion.rotation);
    NSLog(@"头有点转晕了");
}

//捏合手势事件
-(void)PinchAction:(UIPinchGestureRecognizer *)pin
{
    pin.view.transform = CGAffineTransformMakeScale(pin.scale, pin.scale);
    NSLog(@"你是不是二哈");
}
//平移事件
-(void)panAction:(UIPanGestureRecognizer *)pan
{
    //pan.view 中的view是上边的self.simpleView ,由于pan添加到了simpleView上,所以能控制它
    CGPoint p = [pan translationInView:pan.view];
    pan.view.transform = CGAffineTransformMakeTranslation(p.x, p.y);
    NSLog(@"你是猪吗?");
}

//长按手势事件
-(void)LongAction
{
    NSLog(@"你是英雄....");
}

-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
//    NSLog(@"%@",self.simpleView.nextResponder);
//    NSLog( @"%@",self.simpleView.nextResponder.nextResponder);
//    NSLog(@"%@",self.simpleView.nextResponder.nextResponder.nextResponder);
//    NSLog(@"%@",self.simpleView.nextResponder.nextResponder.nextResponder.nextResponder);
//    NSLog(@"%@",self.simpleView.nextResponder.nextResponder.nextResponder.nextResponder.nextResponder);
//    NSLog(@"%@",self.simpleView.nextResponder.nextResponder.nextResponder.nextResponder.nextResponder.nextResponder);
    
}
- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end