迅速的 addsubview 和删除它

我想添加子视图和删除一个点击。 这是我的暗号:

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)

删除子视野:

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")
}
}

但是移除它不起作用

164427 次浏览
小开

You have to use the viewWithTag function to find the view with the given 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")
}
}
小开
最佳答案

Thanks for help. This is the solution: I created the subview and i add a gesture to remove it

@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!")
}
}

Update:

Swift 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!")
}
}
小开

Tested this code using XCode 8 and Swift 3

To Add Custom View to SuperView use:

self.view.addSubview(myView)

To Remove Custom View from Superview use:

self.view.willRemoveSubview(myView)

小开

Assuming you have access to it via outlets or programmatic code, you can remove it by referencing your view foo and the removeFromSuperview method

foo.removeFromSuperview()
小开

I've a view inside my custom CollectionViewCell, and embedding a graph on that view. In order to refresh it, I've to check if there is already a graph placed on that view, remove it and then apply new. Here's the solution

cell.cellView.addSubview(graph)
graph.tag = 10

now, in code block where you want to remove it (in your case gestureRecognizerFunction)

if let removable = cell.cellView.viewWithTag(10){
removable.removeFromSuperview()
}

to embed it again

cell.cellView.addSubview(graph)
graph.tag = 10

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