iOS多點觸控與手勢識別

0 解析關於手勢操做事件

1>UI時間分類

（1）touch：各類手勢

（2）motion：例如到傳感器，例如搖晃

（3）Remote control:利用外部設備，例如插入耳機

2>Touch事件階段

touch begin --> touch move --> touch end --> touch cancel

多指手勢流程：

3>Recognize UIView ViewController的關係

 

1 點擊-UITapGestureRecognizer

    override func viewDidLoad() {
        super.viewDidLoad()
               
        let rect=CGRect(x:80,y:200,width:200,height:200);
        var view1 = UIView(frame: rect)
        view1.backgroundColor = UIColor.redColor()
        self.view.addSubview(view1)
        
        //1,創建手勢識別器
        var gesture = UITapGestureRecognizer(target: self, action: "viewAction:")
#warning 若是想要識別器可以識別多種觸控，例如1點和2點，那就要創建2個UITapGestureRecognizer
        gesture.numberOfTapsRequired = 2    //點擊次數
       // gesture.numberOfTouchesRequired = 2 //多點觸摸
        
        //2,關聯識別器到視圖
        view1.addGestureRecognizer(gesture)
        
    }
    //3，手勢引用的動做
    func viewAction(sender:UITapGestureRecognizer){
        //得到點擊處的位置
        var point:CGPoint = sender.locationInView(self.view)
        println("\(point)")
        println("clicked")
    }

2 放大縮放UIPinchGestureRecognizer

    override func viewDidLoad() {
        super.viewDidLoad()
        
        //1,創建手勢識別器
        var gesture = UIPinchGestureRecognizer(target: self, action: "viewAction:")
        
        //2,關聯識別器到視圖
        view1.addGestureRecognizer(gesture)
        
    }
    //3，手勢引用的動做
    func viewAction(sender:UIPinchGestureRecognizer){
        
        var _height = view1.bounds.height
        var _width  = view1.bounds.width
        
       view1.bounds.size = CGSize(width: _width * sender.scale,
                                        height: _height * sender.scale)
    }

3 旋轉UIRotationGestureRecognizer

  override func viewDidLoad() {
        super.viewDidLoad()
        
        //1,創建手勢識別器
        var gesture = UIRotationGestureRecognizer(target: self, action: "viewAction:")
        
        //2,關聯識別器到視圖
        view1.addGestureRecognizer(gesture)
        
    }
    //3，手勢引用的動做
    func viewAction(sender:UIRotationGestureRecognizer){
        
      view1.transform = CGAffineTransformMakeRotation(sender.rotation)
    }

4 滑動UISwipeGestureRecognizer

 var offsetX:CGFloat = 0.0
  override func viewDidLoad() {
        super.viewDidLoad()
        
        //1,創建手勢識別器
        var gesture = UISwipeGestureRecognizer(target: self, action: "viewAction:")
         //設置多指
        gesture.numberOfTouchesRequired = 2;
        //2,關聯識別器到視圖
        view1.UISwipeGestureRecognizer(gesture)
        
    }
    //3，手勢引用的動做
    func viewAction(sender:UISwipeGestureRecognizer){
        
        offsetX += 20.0
        //方向屬性
        if(sender.direction == UISwipeGestureRecognizerDirection.Right){
            
            view1.transform = CGAffineTransformMakeTranslation(offsetX, 0)
        }
    }

5  平移UIPanGestureRecognizer

  override func viewDidLoad() {
        super.viewDidLoad()
        
        var gesture = UIPanGestureRecognizer(target: self, action: "view1Tap:")
        
        //支持的多指範圍
        gesture.minimumNumberOfTouches = 1;
        gesture.maximumNumberOfTouches = 2;
        
        view1.addGestureRecognizer(gesture)
    }
    //3，手勢引用的動做
    func viewAction(sender:UIPanGestureRecognizer){
        
        //相對於view1視圖偏移的位置
        var _transX = sender.translationInView(view1).x
        var _transY = sender.translationInView(view1).y
        
        view1.transform = CGAffineTransformMakeTranslation(_transX, _transY)
    }

6 長按UILongPressGestureRecognizer

  override func viewDidLoad() {
        super.viewDidLoad()
        
        var gesture = UILongPressGestureRecognizer(target: self, action: "view1Tap:")
        
        //須要的點數和點擊次數
       // gesture.numberOfTouchesRequired
       // gesture.numberOfTapsRequired
        
        //最短長按時間
        gesture.minimumPressDuration = 1
        
        //運行移動的點數，在這個範圍內不發生動做。默認是10
        gesture.allowableMovement = 10
        
        view1.addGestureRecognizer(gesture)
    }
    //3，手勢引用的動做
    func viewAction(sender:UILongPressGestureRecognizer){
        
        UIAlertView(title: "longpress", message: "你長按了", delegate: self, cancelButtonTitle: "肯定").show()
        
    }
    
    //2.獲取手勢的view的座標點
        CGPoint location = [recognizer locationInView:recognizer.view];
      
    //3.判斷點是否在rect範圍
    BOOL isyes = CGRectContainsPoint(btn.frame, location);

7 UIScreenEdgePanGestureRecognizer

class UIScreenEdgePanGestureRecognizer : UIPanGestureRecognizer {
    var edges: UIRectEdge //< The edges on which this gesture recognizes, relative to the current interface orientation
}
是pan的子類，從邊緣出來

8 自定義手勢

//
//  UICustomGestureRecognizer.swift
//  ttt
//
//  Created by ling on 15/8/26.
//  Copyright (c) 2015年 ling. All rights reserved.
//

import UIKit
import UIKit.UIGestureRecognizerSubclass


class UICustomGestureRecognizer: UIGestureRecognizer {
   
    
    var leftTop = false
    var rightBttom = false
    
    //初始化
    override init(target: AnyObject, action: Selector) {
       super.init(target: target, action: action)
    }
    
    
    override func touchesBegan(touches: Set<NSObject>!, withEvent event: UIEvent!) {
        return
    }
    
    override func touchesMoved(touches: Set<NSObject>!, withEvent event: UIEvent!) {
        
        var myTouch = (touches as NSSet).anyObject() as! UITouch
        var myLocation = myTouch.locationInView(self.view)
        
        if(myLocation.x < 10 && myLocation.y < 10){
            leftTop = true;
        }
        
        if((myLocation.x + 10) > self.view?.bounds.width && (myLocation.y + 10) > self.view?.bounds.height){
            rightBttom = true
        }
        
        if(leftTop && rightBttom){
            self.state = UIGestureRecognizerState.Ended
        }
        
        println("\(myLocation)")
        
    }
    
    override func touchesEnded(touches: Set<NSObject>!, withEvent event: UIEvent!) {
        
        self.reset()
        
    }
    
    override func touchesCancelled(touches: Set<NSObject>!, withEvent event: UIEvent!) {
        return
    }
    
}



//
//  UICustomGestureRecognizer.swift
//  ttt
//
//  Created by ling on 15/8/26.
//  Copyright (c) 2015年 ling. All rights reserved.
//

import UIKit
import UIKit.UIGestureRecognizerSubclass


class UICustomGestureRecognizer: UIGestureRecognizer {
   
    
    var leftTop = false
    var rightBttom = false
    
    //初始化
    override init(target: AnyObject, action: Selector) {
       super.init(target: target, action: action)
    }
    
    
    override func touchesBegan(touches: Set<NSObject>!, withEvent event: UIEvent!) {
        return
    }
    
    override func touchesMoved(touches: Set<NSObject>!, withEvent event: UIEvent!) {
        
        var myTouch = (touches as NSSet).anyObject() as! UITouch
        var myLocation = myTouch.locationInView(self.view)
        
        if(myLocation.x < 10 && myLocation.y < 10){
            leftTop = true;
        }
        
        if((myLocation.x + 10) > self.view?.bounds.width && (myLocation.y + 10) > self.view?.bounds.height){
            rightBttom = true
        }
        
        if(leftTop && rightBttom){
            self.state = UIGestureRecognizerState.Ended
        }
        
        println("\(myLocation)")
        
    }
    
    override func touchesEnded(touches: Set<NSObject>!, withEvent event: UIEvent!) {
        
        self.reset()
        
    }
    
    override func touchesCancelled(touches: Set<NSObject>!, withEvent event: UIEvent!) {
        return
    }
    
}