我想添加子视图并一键删除。这是我的代码:
/ *添加子视图* /
var testView: UIView = UIView(frame: CGRectMake(0, 0, 320, 568))
testView.backgroundColor = UIColor.blueColor()
testView.alpha = 0.5
testView.tag = 100
super.view.userInteractionEnabled = false
self.view.userInteractionEnabled = true
self.view.addSubview(testView)
/ *删除子视图* /
override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
let touch = touches.anyObject() as UITouch
let point = touch.locationInView(self.view)
if(testView.tag==100){
println("Tag 100")
testView.removeFromSuperview()
}
else{
println("tag not found")
}
}
但是删除它不起作用有人可以帮助我吗?谢谢!
感谢帮助。这是解决方案:我创建了子视图,并添加了将其删除的手势
@IBAction func infoView(sender: UIButton) {
var testView: UIView = UIView(frame: CGRectMake(0, 0, 320, 568))
testView.backgroundColor = UIColor.blueColor()
testView.alpha = 0.5
testView.tag = 100
testView.userInteractionEnabled = true
self.view.addSubview(testView)
let aSelector : Selector = "removeSubview"
let tapGesture = UITapGestureRecognizer(target:self, action: aSelector)
testView.addGestureRecognizer(tapGesture)
}
func removeSubview(){
println("Start remove sibview")
if let viewWithTag = self.view.viewWithTag(100) {
viewWithTag.removeFromSuperview()
}else{
println("No!")
}
}
更新:
迅捷3+
@IBAction func infoView(sender: UIButton) {
let testView: UIView = UIView(frame: CGRect(x: 0, y: 0, width: 320, height: 568))
testView.backgroundColor = .blue
testView.alpha = 0.5
testView.tag = 100
testView.isUserInteractionEnabled = true
self.view.addSubview(testView)
let aSelector : Selector = #selector(GasMapViewController.removeSubview)
let tapGesture = UITapGestureRecognizer(target:self, action: aSelector)
testView.addGestureRecognizer(tapGesture)
}
func removeSubview(){
print("Start remove sibview")
if let viewWithTag = self.view.viewWithTag(100) {
viewWithTag.removeFromSuperview()
}else{
print("No!")
}
}
您必须使用该viewWithTag
函数查找具有给定的视图tag
。
override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {
let touch = touches.anyObject() as UITouch
let point = touch.locationInView(self.view)
if let viewWithTag = self.view.viewWithTag(100) {
print("Tag 100")
viewWithTag.removeFromSuperview()
} else {
print("tag not found")
}
}
假设您可以通过销售点或编程代码访问它,则可以通过引用您的视图foo
和removeFromSuperview
方法将其删除
foo.removeFromSuperview()
我在自定义CollectionViewCell中有一个视图,并在该视图上嵌入了一个图形。为了刷新它,我必须检查该视图上是否已经放置了图形,将其删除,然后应用新图形。这是解决方案
cell.cellView.addSubview(graph)
graph.tag = 10
现在,在您要删除它的代码块中(在您的情况下,gestureRecognizerFunction)
if let removable = cell.cellView.viewWithTag(10){
removable.removeFromSuperview()
}
再次嵌入
cell.cellView.addSubview(graph)
graph.tag = 10
使用XCode 8和Swift 3测试了此代码
要将自定义视图添加到SuperView,请使用:
self.view.addSubview(myView)
要从Superview中删除自定义视图,请使用:
self.view.willRemoveSubview(myView)
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文章标签:ios , swift , uiview
版权声明:本文为原创文章,版权归 admin 所有,欢迎分享本文,转载请保留出处!
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