Question

我已将UIView()添加到UIApplication.shared.keyWindow，因此它会覆盖整个屏幕。

到那个UIView我添加一个渐变颜色作为子图层（我认为这不会导致问题）。

经过一些初步设置后，我尝试使用removeFromSuperview()调用删除此视图，但它不会被删除。

我正在主要调度，因为我正在后台线程中进行此删除调用。

以下是相关代码：

将视图添加到keyWindow

fileprivate func addOverlapView() {
    let frame = CGRect(x: 0, y: 0, width: self.view.frame.width, height: self.view.frame.height)
    self.overlapView = UIView(frame: frame)

    let overlapGradient: CAGradientLayer = CAGradientLayer()
    overlapGradient.colors = [self.fromColor.cgColor, self.toColor.cgColor]
    overlapGradient.locations = [0.0, 1.0]
    overlapGradient.frame = self.view.bounds
    overlapGradient.masksToBounds = true
    overlapView.layer.insertSublayer(overlapGradient, at: 0)

    let textLabel = UILabel()
    textLabel.text = "Configuring user settings"
    textLabel.textAlignment = .center
    textLabel.textColor = .white

    overlapView.addSubview(textLabel)

    textLabel.anchor(top: nil, left: nil, bottom: nil, right: nil, paddingTop: 0, paddinfLeft: 0, paddingBottom: 0, paddingRight: 0, width: overlapView.frame.width, height: 100)
    textLabel.centerXAnchor.constraint(equalTo: overlapView.centerXAnchor).isActive = true
    textLabel.centerYAnchor.constraint(equalTo: overlapView.centerYAnchor).isActive = true
    UIApplication.shared.keyWindow?.addSubview(overlapView)

}

然后我尝试使用以下调用删除它：

DispatchQueue.main.async {
    self.overlapView.removeFromSuperview()
}

但不知怎的，这个观点并没有被删除。

对可能导致此问题的任何暗示？

UIView没有从UIWindow中删除

0 个答案: