UItouch、手势集合、自定义图片按钮

UItouch、手势集合、自定义图片按钮

UItouch

//MARK: - UITouch
extension ViewController{

    //1.每次开始触摸的时候会自动调用
    override func touchesBegan(touches: Set, withEvent event: UIEvent?) {
     
        //print("开始触摸:\(touches)")
        
        //参数1:touches->在多个手指同时触摸屏幕的时候只能获取到一个触摸对象
        //拿到当前的触摸对象
        let touch = touches.first
        //拿到当前触摸点的位置
        //参数:计算坐标的相对视图
        let location = touch?.locationInView(self.view)
        print(location)
        
        //参数2:event -> 可以拿到多个触摸对象
        let allTouches = event?.allTouches()
        print("ALL:\(allTouches?.count)")
        //遍历拿到每个触摸对象
        for item in allTouches! {
        
           print(item.locationInView(self.view))
         
        }
        
        
        //设置球的坐标，让其出现在开始触摸的位置
        self.ball.center = location!
        
        
    }
    
    //2.每次触摸结束的时候会自动调用
    override func touchesEnded(touches: Set, withEvent event: UIEvent?) {
        
        print("触摸结束")
    }
    
    //3.手指在屏幕上移动的时候会实时调用
    override func touchesMoved(touches: Set, withEvent event: UIEvent?) {
        
        //拿到移动过程中的坐标点
        let touch = touches.first
        let loctaion = touch?.locationInView(self.view)
        self.ball.center = loctaion!
        
        print("移动")
    }
  

手势集合

手势的添加步骤
 //1.创建点击手势对象
        //UIGestureRecognizer是所有的手势的父类
        //参数1:调用方法的对象
        //参数2:方法对应的选择器 -> 这个方法如果带参只能带一个参数，参数的实参就是当前创建的点击手势对象
        //点击手势发生的时候让参数1调用参数2中的方法
        let tap = UITapGestureRecognizer.init(target: self, action: "tapAction:")
        //核心属性:点击次数(默认是1->单击)
        tap.numberOfTapsRequired = 2  //双击
        
        
        //2.将点击手势添加到视图上(要求:添加手势的视图必须可以进行用户交互)
        //self.view.addGestureRecognizer(tap)
        
        //3.打开图片的用户交互，并且添加点击手势
        self.imageView.userInteractionEnabled = true
        //注意:同一个手势对象，只能被添加到一个视图
        self.imageView.addGestureRecognizer(tap)

其他几种手势名称以及核心属性

//停止UIView动画
        self.imageView.layer.removeAllAnimations()
 //让形变清空
        self.imageView.transform = CGAffineTransformIdentity
 //所有的手势类都一个状态属性，用来获取手势的开始和结束状态
       longPress.state == .Began
       longPress.state == .Ended
===================================
//2长按手势
longPress = UILongPressGestureRecognizer
//核心属性:长按时间
        longPress.minimumPressDuration = 1
//3滑动手势
        swipe =  UISwipeGestureRecognizer
//核心属性:滑动方向(默认是右滑->从左往右滑)
        swipe.direction = .Right
 //4拖动手势
        pan = UIPanGestureRecognizer
//核心属性:在指定视图上的位移
        let translation = pan.translationInView(self.view)
//5缩放手势
        pinch = UIPinchGestureRecognizer
//.核心属性:缩放比
        let scale = pinch.scale
//6旋转手势
        rotationG = UIRotationGestureRecognizer
//核心属性:旋转角度
        let rotation = rotationG.rotation
      

创建图片按钮

建一个继承UIImageVIew的类，向BTu一样给图片添加一个事件的方法，然后创建图片的时候就可以通过这个类，就可以调用事件的方法了，就和按钮一样功能了

enum YTControlEvent {
    case TouchDown  //-->touchesDegan
    case TouchUpInside //-->touchesEnded
}

class YTImageView: UIImageView {
    //MARK: -属性
    var target:AnyObject? = nil
    var action:Selector? = nil
    var event:YTControlEvent? = nil
    
    //MARK: - 方法
    //保存target、action和controlEvent的值
    func addTarget(target: AnyObject?, action: Selector, forControlEvent controlEvent: YTControlEvent){
    
        //打开用户交互
        self.userInteractionEnabled = true
        
        //保存对象和事件
        self.target = target
        self.action = action
        self.event = controlEvent
    }
    
    
    override func touchesBegan(touches: Set, withEvent event: UIEvent?) {
        
        if self.event == YTControlEvent.TouchDown {
            self.target?.performSelector(self.action!, withObject: self)
        }
        
    }
    
    
    override func touchesEnded(touches: Set, withEvent event: UIEvent?) {
        
        if self.event == YTControlEvent.TouchUpInside {

            self.target?.performSelector(self.action!, withObject: self)
        }
    }