Question

我最初在xcode 10中开发了应用程序，但是我已经升级到xcode 11，然后Loader没有隐藏下面的代码

import UIKit

class LoadingView: UIView {

//MARK:  IndicatoreShow
class func Show() {
    DispatchQueue.main.async {
        let loadingView = LoadingView(frame: UIScreen.main.bounds)
        loadingView.backgroundColor = UIColor(red: 0, green: 0, blue: 0, alpha: 0.8)
        if let _lastWindow = UIApplication.shared.windows.last {
            if !_lastWindow.subviews.contains(where: { $0 is LoadingView }) {
                _lastWindow.endEditing(true)
                _lastWindow.addSubview(loadingView)
            }
        }
        loadingView.addFadeAnimationWithFadeType(.fadeIn)
        let indicator = UIActivityIndicatorView(frame: CGRect(x: 0, y: 0, width: 30, height: 30))
        indicator.center = loadingView.center
        indicator.tintColor = .white
        if UI_USER_INTERFACE_IDIOM() == .pad {
            indicator.style = .whiteLarge
        } else {
            indicator.style = .white
        }
        indicator.startAnimating()
        loadingView.addSubview(indicator)
    }
}

//MARK:  IndicatoreHide
class func Hide() {
    DispatchQueue.main.async {
        if let _lastWindow = UIApplication.shared.windows.last {
            for subview in _lastWindow.subviews {
                if let loadingView = subview as? LoadingView {
                    loadingView.addFadeAnimationWithFadeType(.fadeOut)
                }
            }
        }
    }
}
}

 //MARK:  Animation Enum
  enum FadeType {
    case fadeIn
    case fadeOut
  }

extension UIView {

//MARK:  AnimationWith Fade
func addFadeAnimationWithFadeType(_ fadeType: FadeType) {

    switch fadeType {
    //MARK:  fade IN
    case .fadeIn:

        DispatchQueue.main.async {
            self.alpha = 0.0
            UIView.animate(withDuration: 0.5, animations: { () -> Void in
                self.alpha = 1.0
            })
        }
    //MARK:  Fade Out
    case .fadeOut:

        UIView.animate(withDuration: 0.5, animations: { () -> Void in
            DispatchQueue.main.async {
                self.alpha = 0.0
            }
        }, completion: { (finished) -> Void in
            if finished {
                self.removeFromSuperview()
            }
        })
    }
}
}

我曾经 LoadingView.Show（）//正在工作 LoadingView.Hide（）//在iOS 13中不起作用我应该更改代码什么，因为许多代码无法在iOS 13中正常工作，例如状态栏背景颜色

Answer 1

在您发布的代码中，“淡出”块如下所示：

    //MARK:  Fade Out
    case .fadeOut:

        UIView.animate(withDuration: 0.5, animations: { () -> Void in
            DispatchQueue.main.async {
                self.alpha = 0.0
            }
        }, completion: { (finished) -> Void in
            if finished {
                self.removeFromSuperview()
            }
        })
    }

在DispatchQueue.main.async中包装的仅行代码为self.alpha = 0.0。其他所有内容都将在调用它的线程上执行。

将该案例更改为：

    //MARK:  Fade Out
    case .fadeOut:

        DispatchQueue.main.async {
            UIView.animate(withDuration: 0.5, animations: { () -> Void in
                self.alpha = 0.0
            }, completion: { (finished) -> Void in
                if finished {
                    self.removeFromSuperview()
                }
            })
        }

    }

可能会解决问题。

未在iOS13中删除UIView，但可在iOS 12中使用

1 个答案: