IOS 开发之swift中手势的实例详解
手势操作主要包括如下几类
| 手势 | 属性 | 说明 |
|---|---|---|
| 点击 UITapGestureRecognizer | numberOfTapsRequired：点击的次数；numberOfTouchesRequired：点击时有手指数量 | 设置属性 numberOfTapsRequired 可以实现单击，或双击的效果 |
| 滑动 UISwipeGestureRecognizer | direction：滑动方向 | direction 滑动方向分为上Up、下Down、左Left、右Right |
| 拖动 UIPanGestureRecognizer | 在拖动过程中，通过方法 translationInView 获取拖动时的位移 | |
| 长按 UILongPressGestureRecognizer | minimumPressDuration：长按最少时间 | |
| 旋转 UIRotationGestureRecognizer | ||
| 缩放 UIPinchGestureRecognizer |
注意：手势效果在实施过程中，存在几种状态：
* Began
* Ended
* Cancelled
* Failed
* Possible
手势效果图
代码示例
// 点击
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 = "手势操作-单指单击手势";
label.adjustsFontSizeToFitWidth = true
label.textAlignment = .Center;
// 添加手势
let tapRecognizer = UITapGestureRecognizer(target: self, action: Selector("tapClick:"))
tapRecognizer.numberOfTapsRequired = 1
tapRecognizer.numberOfTouchesRequired = 1
label.userInteractionEnabled = true
label.addGestureRecognizer(tapRecognizer)
// 手势响应方法
func tapClick(recognizer:UITapGestureRecognizer)
{
let label:UILabel = recognizer.view as! UILabel
label.textColor = UIColor.redColor()
}
// 滑动
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 = "手势操作-左滑手势";
label.adjustsFontSizeToFitWidth = true
label.textAlignment = .Center;
// 添加手势
let swipeLeftRecognizer = UISwipeGestureRecognizer(target: self, action: Selector("swipeLeftClick:"))
swipeLeftRecognizer.direction = .Left
swipeLeftRecognizer.numberOfTouchesRequired = 1
label.userInteractionEnabled = true
label.addGestureRecognizer(swipeLeftRecognizer)
// 手势响应方法
func swipeLeftClick(recognizer:UISwipeGestureRecognizer)
{
let label = recognizer.view
label!.backgroundColor = UIColor.orangeColor()
}
