ios Swift addsubview 并删除它
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Swift addsubview and remove it
提问by Dasoga
I want to add sub view and remove with one tap. This is my code:
我想添加子视图并一键删除。这是我的代码：
/* To add subview */
/* 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)
/* To remove subview */
/* 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")
}
}
But the remove it isn't working Someone can help me please? Thanks!
但是删除它不起作用有人可以帮助我吗？谢谢！
回答by Dasoga
Thanks for help. This is the solution: I created the subview and i add a gesture to remove it
感谢帮助。这是解决方案：我创建了子视图并添加了一个手势来删除它
@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:
更新：
Swift 3+
斯威夫特 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!")
}
}
回答by rakeshbs
You have to use the viewWithTagfunction to find the view with the given tag.
您必须使用该viewWithTag函数来查找具有给定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")
}
}
回答by craft
Assuming you have access to it via outlets or programmatic code, you can remove it by referencing your view fooand the removeFromSuperviewmethod
假设您可以通过插座或程序代码访问它，您可以通过引用您的视图foo和removeFromSuperview方法来删除它
foo.removeFromSuperview()
回答by Pravin Kamble
Tested this code using XCode 8 and Swift 3
使用 XCode 8 和 Swift 3 测试了这段代码
To Add Custom View to SuperView use:
要将自定义视图添加到 SuperView，请使用：
self.view.addSubview(myView)
self.view.addSubview(myView)
To Remove Custom View from Superview use:
要从 Superview 中删除自定义视图，请使用：
self.view.willRemoveSubview(myView)
self.view.willRemoveSubview(myView)
