xcode – 如何使UIImageView可以兼容并使其执行某些操作？ (迅速
发布时间：2020-12-15 01:50:44 所属栏目：百科 来源：网络整理
导读：(我刚开始使用Swift几天前对编程比较新,所以请耐心等待.)我试图在屏幕上显示随机块,用户必须点击它们才能使它们消失.我已经能够创建块,但我不知道如何实际使它们可以应用.有人可以帮帮我吗？到目前为止这是我的代码： func createBlock(){ let imageName = "
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(我刚开始使用Swift几天前对编程比较新,所以请耐心等待.)我试图在屏幕上显示随机块,用户必须点击它们才能使它们消失.我已经能够创建块,但我不知道如何实际使它们可以应用.有人可以帮帮我吗？到目前为止这是我的代码：
func createBlock(){
let imageName = "block.png"
let image = UIImage(named: imageName)
let imageView = UIImageView(image: image!)
imageView.frame = CGRect(x: xPosition,y: -50,width: size,height: size)
self.view.addSubview(imageView)
UIView.animateWithDuration(duration,delay: delay,options: options,animations: {
imageView.backgroundColor = UIColor.redColor()
imageView.frame = CGRect(x: self.xPosition,y: 590,width: self.size,height: self.size)
},completion: { animationFinished in
imageView.removeFromSuperview()
})
}
这是新代码： func createBlock(){
let imageName = "block.png"
let image = UIImage(named: imageName)
let imageView = UIImageView(image: image!)
imageView.frame = CGRect(x: xPosition,height: size)
self.view.addSubview(imageView)
imageView.userInteractionEnabled = true
let tapRecognizer = UITapGestureRecognizer(target: self,action: Selector("imageTapped"))
imageView.addGestureRecognizer(tapRecognizer)
func imageTapped(gestureRecognizer: UITapGestureRecognizer) {
let tappedImageView = gestureRecognizer.view!
tappedImageView.removeFromSuperview()
score += 10
}
UIView.animateWithDuration(duration,animations: {
imageView.backgroundColor = UIColor.redColor()
imageView.frame = CGRect(x: self.xPosition,completion: { animationFinished in
imageView.removeFromSuperview()
})
}
解决方法
创建视图后,需要将其userInteractionEnabled属性设置为true.然后你需要附加一个手势.
imageView.userInteractionEnabled = true
//now you need a tap gesture recognizer
//note that target and action point to what happens when the action is recognized.
let tapRecognizer = UITapGestureRecognizer(target: self,action: Selector("imageTapped:"))
//Add the recognizer to your view.
imageView.addGestureRecognizer(tapRecognizer)
现在你仍然需要这个函数,在这种情况下是imageTapped：,这是识别手势时动作发生的地方.已识别的手势将作为参数发送,您可以从手势视图属性中找出从哪个图像视图中点击. func imageTapped(gestureRecognizer: UITapGestureRecognizer) {
//tappedImageView will be the image view that was tapped.
//dismiss it,animate it off screen,whatever.
let tappedImageView = gestureRecognizer.view!
}
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