我想要实现的是,当用户触摸 UIImageView 时设置 Image1,当用户抬起手指时设置 Image2。
我只能用此代码获取 UIGestureRecognizerState.Ended
var tap = UITapGestureRecognizer(target: self, action: Selector("tappedMe:"))
imageView.addGestureRecognizer(tap)
imageView.userInteractionEnabled = true
func tappedMe(gesture: UITapGestureRecognizer)
{
if gesture.state == UIGestureRecognizerState.Began{
imageView.image=originalImage
dbgView.text="Began"
}else if gesture.state == UIGestureRecognizerState.Ended{
imageView.image=filteredImage
dbgView.text="Ended"
}else if gesture.state == UIGestureRecognizerState.Cancelled{
imageView.image=filteredImage
dbgView.text="Cancelled"
}else if gesture.state == UIGestureRecognizerState.Changed{
imageView.image=filteredImage
dbgView.text="Changed"
}
}
UITapGestureRecognizer 不会将其状态更改为.Began
,但 UILongPressGestureRecognizer 可以。如果您出于某种原因字体想要直接覆盖触摸回调,您可以使用具有非常短的 UILongPressGestureRecognizerminimumPressDuration
比如0.1就可以达到效果。
@Daij-Djan 的示例:
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
var tap = UILongPressGestureRecognizer(target: self, action: Selector("pressedMe:"))
tap.minimumPressDuration = 0
self.view.addGestureRecognizer(tap)
self.view.userInteractionEnabled = true
}
func pressedMe(gesture: UITapGestureRecognizer) {
if gesture.state == .Began{
self.view.backgroundColor = UIColor.blackColor()
} else if gesture.state == .Ended {
self.view.backgroundColor = UIColor.whiteColor()
}
}
}
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