UIGestureRecognizer(手势)、touch(触摸)

// touch(触摸)、和手势
// 手势核心就是设置delegate和在需要手势监测的view上使用addGestureRecognizer添加指定的手势监测
#import "ViewController.h"
@interface ViewController ()<UIGestureRecognizerDelegate> // 添加手势代理协议
{
    /** 定义UIImageView类型全局变量image */
    UIImageView* image;
}

// touch的四种方法 （3.2以前主要使用这四种方法） touch可以用来自定义手势
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event; // 开始
//{
//    UITouch* touch = [touches anyObject]; // 点击对象
//    CGPoint poin = [touch locationInView:self]; // 获取点击位置
//}
-(void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event;  // 解除，取消
-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event;  // 结束
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event;  // 移动
@end
@implementation ViewController
- (void)viewDidLoad {
    [super viewDidLoad];
    
    image  =[[UIImageView alloc]initWithFrame:CGRectMake(100, 100, 100, 100)];
    // 添加图片到视图
    image.image = [UIImage imageNamed:@"素材07-6"];
    // 设置图片类型为合适
    image.contentMode = UIViewContentModeScaleAspectFit;
    // 添加视图上
    [self.view addSubview:image];
    // 允许与用户交互
    image.userInteractionEnabled = YES;
    
    // 手势  继承UIGestureRecognizer
    /*
    UITapGestureRecognizer, // 点击
    UIPinchGestureRecognizer, //  捏合
    UIRotationGestureRecognizer, // 旋转
    UISwipeGestureRecognizer,  // 滑动，快速移动
    UIPanGestureRecognizer,  // 拖动，慢速移动
    UILongPressGestureRecognizer  // 长按
     
     有些手势是关联的，例如：Tap与LongPress、Swipe与Pan、或是Tap一次与Tap两次
     
     手势识别是具有互斥的原则的，比如单击和双击，如果他识别出一种手势，其后的手势将不被识别；
     
     关联手势的处理：比如单击和双击，如果不做处理，它就只能发送单击的消息。为了能够识别出双击手势，就需要做一个特殊的处理逻辑，即先判断手势是否是双击，在双击失效的情况下作为单击手势处理。
     [A requireGestureRecognizerToFail: B];函数，它可以指定当A手势发生时，即便A已经满足条件了，也不会立刻触发，会等到指定的手势B确定失败之后才触发。
     */
    // 点击（单击）
    UITapGestureRecognizer* oneTap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(oneTap:)];
    // 单击，numberOfTapsRequired = 2 是双击 // 设置一个时间间隔
    oneTap.numberOfTapsRequired = 1; // 设置点击次数
    // 点击的手指数 默认为1
    oneTap.numberOfTouchesRequired = 1;
    // 默认为0
    int a= oneTap.numberOfTouches;
    NSLog(@"a = %d",a);
    // 添加手势监测
    [image addGestureRecognizer:oneTap];
    
    // 双击
    UITapGestureRecognizer* twoTap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(twoTap:)];
    twoTap.numberOfTapsRequired = 2;
    [image addGestureRecognizer:twoTap];

    //（关键）、双击手势确定监测失败才会触发单击手势的响应操作(手势互斥时使用)
    [oneTap requireGestureRecognizerToFail:twoTap]; // 手势的依赖性
    
    
    // 捏合
    UIPinchGestureRecognizer* pinch = [[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(pinch:)];
    [image addGestureRecognizer:pinch];
    
    // 旋转
    UIRotationGestureRecognizer* rotation = [[UIRotationGestureRecognizer alloc]initWithTarget:self action:@selector(rotation:)];
    [image addGestureRecognizer:rotation];
    
    // 滑动，快速移动
    UISwipeGestureRecognizer* swipe = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipe:)];
    // 设置滑动方向 默认时向右
    swipe.direction = UISwipeGestureRecognizerDirectionRight;
    typedef  enum{
        UISwipeGestureRecognizerDirectionDown, //
        UISwipeGestureRecognizerDirectionLeft, // 向左
        UISwipeGestureRecognizerDirectionRight, // 向右
        UISwipeGestureRecognizerDirectionUp, //
    }UISwipeGestureRecognizerDirection;
    
    [image addGestureRecognizer:swipe];
    
    // 拖动，慢速移动
    UIPanGestureRecognizer* pan = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(pan:)];
    // 默认为－1；最大触摸点数
    pan.maximumNumberOfTouches = 1; //
    // 默认为1；最小触摸点数
    pan.minimumNumberOfTouches = 2; // 这两个属性只有Pan有
    
    [image addGestureRecognizer:pan];
    
    // 长按
    UILongPressGestureRecognizer* zer = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(lon:)];
    // 设置长按时间
    zer.minimumPressDuration = 0.5; // 2秒
    [image addGestureRecognizer:zer];
}
// 点击(单击)
- (void)oneTap:(UITapGestureRecognizer*)tap{
//    if (tap.numberOfTapsRequired == 1) {
//        NSLog(@"单击");
//    }else if(tap.numberOfTapsRequired == 2){
//        NSLog(@"双击");
//    }
    
        NSLog(@"单击");
}
// 双击
- (void)twoTap:(UITapGestureRecognizer*)two{
    NSLog(@"双击");
}

// 捏合
- (void)pinch:(UIPinchGestureRecognizer*)pinch{
    // 放大缩小 （形变属性）
    pinch.view.transform = CGAffineTransformScale(pinch.view.transform, pinch.scale, pinch.scale);
    // 恢复标准 标准是1，大于1放大，小于1缩小
    pinch.scale = 1;
    // 清空形变属性
    // pinch.view.transform = CGAffineTransformIdentity;
    
    // 和上面等效 （但是这种方法缩放时没有滑动而是直接闪现缩放）
    pinch.view.transform = CGAffineTransformScale(CGAffineTransformIdentity, pinch.scale, pinch.scale);
}
// 旋转
- (void)rotation:(UIRotationGestureRecognizer*)rotation{
    // 旋转（形变属性） // 和上面同理
    rotation.view.transform = CGAffineTransformRotate(rotation.view.transform, rotation.rotation);
    //
    rotation.rotation = 0;
    
    // rotation.view.transform = CGAffineTransformRotate(CGAffineTransformIdentity, rotation.rotation);
}
// 滑动，快速移动
- (void)swipe:(UISwipeGestureRecognizer*)swipe{
    NSLog(@"快速移动");
}
// 拖动，慢速移动
- (void)pan:(UIPanGestureRecognizer*)pan{
    // 移动（形变属性） // 和上面同理
    CGPoint translation = [pan translationInView:self.view];
    pan.view.center = CGPointMake(pan.view.center.x + translation.x, pan.view.center.y + translation.y);
    [pan setTranslation:CGPointZero inView:self.view];
}
// 长按
-(void)lon:(UILongPressGestureRecognizer*)longe{
    NSLog(@"长按");
}

// 代理方法
-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{
    return YES;
}
-(BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer{
    return YES;
}
-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRequireFailureOfGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{
    return YES;
}
-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch{
    return YES;
}
-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldBeRequiredToFailByGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{
    return YES;
}