ios - UIView 即使在开始从 superview 中移除后也会重新出现

Question

我有一个问题，如果我从 super View 中删除 subview ，然后当我推送到另一个 VC 并返回时，所有删除的 subview 都会重新出现在 View 中，我已经尝试了所有方法并检查了我的代码，如果 viewDidApper 也是。

//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

Answer 1

我看了测试项目。我想我发现了问题，它在 override func removeFromSuperview()我将其注释掉并编辑 removeAllUsers()

func removeAllUsers() {
    for view in self.subviews {
        if view is PRButton  {
          UIView.animate(withDuration: 1, animations: { 
            view.alpha = 0
          }, completion: { (finished) in
            view.removeFromSuperview()
          })
        }
    }
    items.removeAll()

}

现在，当我返回 viewController

时，我没有看到任何重复的用户