我有一个问题,如果我从 super 视图中删除子视图,然后当我推送到另一个VC并重新出现时,所有删除的子视图会重新出现在视图中,我已经尝试了一切并检查了我的代码是否也是viewDidApper。
//HERE IS HOW I ADD VIEWS
func addusers() {
for user in 0...5 {
let radarButton = PRButton(frame: CGRect(x: 0, y: 0, width: itemSize.width, height: itemSize.height+14))
radarButton.profileButton?.setImage(UIImage(named: "dummy-avatar.png"), for: UIControlState())
radarButton.profileName.setTitle("test \(user)", for: .normal)
repeat {
let center = generateCenterPointInRadar()
radarButton.center = CGPoint(x: center.x, y: center.y)
} while (itemFrameIntersectsInOtherItem(radarButton.frame))
radarButton.profileButton?.addTarget(self, action: #selector(didTapUser), for: .touchUpInside)
radarButton.profileName?.addTarget(self, action: #selector(didTapUser), for: .touchUpInside)
self.addSubview(radarButton)
items.append(radarButton)
}
}
//HERE IS HOW I REMOVE VIEWS
func removeAllUsers() {
for view in self.subviews {
if view is PRButton {
view.removeFromSuperview()
}
}
items.removeAll()
}
//Remove from superview
override func removeFromSuperview() {
UIView.beginAnimations("", context: nil)
UIView.setAnimationDuration(1)
self.alpha = 0
UIView.setAnimationDidStop(Selector(("callSuperRemoveFromSuperview")))
UIView.commitAnimations()
}
fileprivate func callSuperRemoveFromSuperview() {
super.removeFromSuperview()
}
提前致谢
最佳答案
首先要看的是...
在PRButton
中,您将覆盖removeFromSuperview()
-但是您的结构不正确,并且您实际上从未删除过该视图。
替换为:
override func removeFromSuperview() {
UIView.animate(withDuration: 1.0, animations: ({
self.alpha = 0.0
}), completion: { _ in
self.callSuperRemoveFromSuperview()
})
}
您也可以简单地调用
super.removeFromSuperview()
而不是其他的self.callSuperRemoveFromSuperview()
函数。了解
Debug View Hierarchy
功能...您会立即看到的。