IOS 開發(fā)之swift中手勢的實例詳解

更新時間：2017年09月12日 10:14:02 作者：番薯大佬

這篇文章主要介紹了IOS 開發(fā)之swift中手勢的實例詳解的相關(guān)資料,希望通過本文大家能掌握IOS手勢的使用方法，需要的朋友可以參考下

IOS 開發(fā)之swift中手勢的實例詳解

手勢操作主要包括如下幾類

手勢	屬性	說明
點擊 UITapGestureRecognizer	numberOfTapsRequired：點擊的次數(shù)；numberOfTouchesRequired：點擊時有手指數(shù)量	設(shè)置屬性 numberOfTapsRequired 可以實現(xiàn)單擊，或雙擊的效果
滑動 UISwipeGestureRecognizer	direction：滑動方向	direction 滑動方向分為上Up、下Down、左Left、右Right
拖動 UIPanGestureRecognizer		在拖動過程中，通過方法 translationInView 獲取拖動時的位移
長按 UILongPressGestureRecognizer	minimumPressDuration：長按最少時間
旋轉(zhuǎn) UIRotationGestureRecognizer
縮放 UIPinchGestureRecognizer

注意：手勢效果在實施過程中，存在幾種狀態(tài)：

* Began
* Ended
* Cancelled
* Failed
* Possible

手勢效果圖

代碼示例

// 點擊
let label = UILabel(frame: CGRectMake(10.0, 10.0, (self.view.frame.size.width - 10.0 * 2), 60.0))
self.view.addSubview(label)
label.backgroundColor = UIColor.lightGrayColor()
label.text = "手勢操作-單指單擊手勢";
label.adjustsFontSizeToFitWidth = true
label.textAlignment = .Center;
// 添加手勢
let tapRecognizer = UITapGestureRecognizer(target: self, action: Selector("tapClick:"))
tapRecognizer.numberOfTapsRequired = 1
tapRecognizer.numberOfTouchesRequired = 1
label.userInteractionEnabled = true
label.addGestureRecognizer(tapRecognizer)

// 手勢響應(yīng)方法
func tapClick(recognizer:UITapGestureRecognizer)
{
    let label:UILabel = recognizer.view as! UILabel
    label.textColor = UIColor.redColor()
}

// 滑動
let label = UILabel(frame: CGRectMake(10.0, 10.0, (self.view.frame.size.width - 10.0 * 2), 60.0))
self.view.addSubview(label)
label.backgroundColor = UIColor.lightGrayColor()
label.text = "手勢操作-左滑手勢";
label.adjustsFontSizeToFitWidth = true
label.textAlignment = .Center;
// 添加手勢
let swipeLeftRecognizer = UISwipeGestureRecognizer(target: self, action: Selector("swipeLeftClick:"))
swipeLeftRecognizer.direction = .Left
swipeLeftRecognizer.numberOfTouchesRequired = 1
label.userInteractionEnabled = true
label.addGestureRecognizer(swipeLeftRecognizer)

// 手勢響應(yīng)方法
func swipeLeftClick(recognizer:UISwipeGestureRecognizer)
{
    let label = recognizer.view
    label!.backgroundColor = UIColor.orangeColor()
}

// 拖動
let label = UILabel(frame: CGRectMake(10.0, 10.0, 100.0, 100.0))
self.view.addSubview(label)
label.backgroundColor = UIColor.lightGrayColor()
label.text = "手勢操作-拖動手勢";
label.adjustsFontSizeToFitWidth = true
label.textAlignment = .Center;
// 添加手勢
let panRecognizer = UIPanGestureRecognizer(target: self, action: Selector("panClick:"))
label.userInteractionEnabled = true
label.addGestureRecognizer(panRecognizer)

var pointValue:CGPoint! = CGPointZero // 移動
// 手勢響應(yīng)方法
func panClick(recognizer:UIPanGestureRecognizer)
{
    let label:UILabel = recognizer.view as! UILabel

    let point = recognizer.translationInView(label)
    print("pan point = \(point)")

    // 移動
    label.transform = CGAffineTransformMakeTranslation(point.x + self.pointValue.x, point.y + self.pointValue.y)

    if recognizer.state == .Began
    {
      label.backgroundColor = UIColor.yellowColor()
      self.view.bringSubviewToFront(label)
    }
    else if recognizer.state == .Ended
    {
      label.backgroundColor = UIColor.lightGrayColor()

      self.pointValue.x += point.x
      self.pointValue.y += point.y
    }
}

// 縮放
let label = UILabel(frame: CGRectMake(10.0, 10.0, 200.0, 200.0))
self.view.addSubview(label)
label.backgroundColor = UIColor.lightGrayColor()
label.text = "手勢操作-捏合手勢";
label.adjustsFontSizeToFitWidth = true
label.textAlignment = .Center;
// 添加手勢
let pinchRecognizer = UIPinchGestureRecognizer(target: self, action: Selector("pinchClick:"))
label.userInteractionEnabled = true
label.addGestureRecognizer(pinchRecognizer)

// 手勢響應(yīng)方法
var scaleValue:CGFloat! = 1.0 // 縮放
func pinchClick(recognizer:UIPinchGestureRecognizer)
{
    let label:UILabel = recognizer.view as! UILabel

    let scale = recognizer.scale;
    if scale > 1.0
    {
      // 放大
      label.transform = CGAffineTransformMakeScale(self.scaleValue + scale - 1.0, self.scaleValue + scale - 1.0)
    }
    else
    {
      // 縮小
      label.transform = CGAffineTransformMakeScale(self.scaleValue * scale, self.scaleValue * scale)
    }

    if recognizer.state == .Began
    {
      label.backgroundColor = UIColor.greenColor()
      self.view.bringSubviewToFront(label)
    }
    else if recognizer.state == .Ended
    {
      label.backgroundColor = UIColor.lightGrayColor()

      if scale > 1.0
      {
        self.scaleValue = self.scaleValue + scale - 1.0;
      }
      else
      {
        self.scaleValue = self.scaleValue * scale
      }
    }
}

// 旋轉(zhuǎn)
let label = UILabel(frame: CGRectMake(10.0, 10.0, 200.0, 200.0))
self.view.addSubview(label)
label.backgroundColor = UIColor.lightGrayColor()
label.text = "手勢操作-旋轉(zhuǎn)手勢";
label.adjustsFontSizeToFitWidth = true
label.textAlignment = .Center;
// 添加手勢
let rotationRecognizer = UIRotationGestureRecognizer(target: self, action: Selector("ratotionClick:"))
label.userInteractionEnabled = true
label.addGestureRecognizer(rotationRecognizer)

var rotationValue:CGFloat! = 1.0 // 旋轉(zhuǎn)
// 手勢響應(yīng)方法
func ratotionClick(recognizer:UIRotationGestureRecognizer)
{
    let label:UILabel = recognizer.view as! UILabel

    let rotation = recognizer.rotation
    label.transform = CGAffineTransformMakeRotation(rotation + self.rotationValue)

    if recognizer.state == .Began
    {
      label.backgroundColor = UIColor.greenColor()
      self.view.bringSubviewToFront(label)
    }
    else if recognizer.state == .Ended
    {
      label.backgroundColor = UIColor.lightGrayColor()

      self.rotationValue = self.rotationValue + rotation
    }
}

// 長按
let label = UILabel(frame: CGRectMake(10.0, 10.0, (self.view.frame.size.width - 10.0 * 2), 60.0))
self.view.addSubview(label)
label.backgroundColor = UIColor.lightGrayColor()
label.text = "手勢操作-長按手勢";
label.adjustsFontSizeToFitWidth = true
label.textAlignment = .Center;
// 添加手勢
let pressRecognizer = UILongPressGestureRecognizer(target: self, action: Selector("pressClick:"))
    pressRecognizer.minimumPressDuration = 3.0
    label.userInteractionEnabled = true
    label.addGestureRecognizer(pressRecognizer)

// 手勢響應(yīng)方法
func pressClick(recognizer:UILongPressGestureRecognizer)
{
    let label:UILabel = recognizer.view as! UILabel

    if recognizer.state == .Began
    {
      let alertView = UIAlertView(title: nil, message: "長按響應(yīng)", delegate: nil, cancelButtonTitle: "知道了")
      alertView.show()

      label.backgroundColor = UIColor.orangeColor()
      self.view.bringSubviewToFront(label)
    }
    else if recognizer.state == .Ended
    {
      label.backgroundColor = UIColor.lightGrayColor()
    }
}

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