使用计时器关闭 UIAlertController

Question

如果未点击“确定”按钮，几秒钟后关闭 UIAlertController.Style.actionSheet。

我尝试在显示 actionSheet 后立即放置一个计时器来调用一个方法来关闭它，但它没有关闭它。

这是我的代码：

func showActionSheet(){
    
    let alert = UIAlertController(title: "Some Tile", message: "Some Message", preferredStyle: UIAlertController.Style.actionSheet)

    alert.addAction(UIAlertAction(title: "OK", style: UIAlertAction.Style.cancel, handler: {
        action in
        self.closeSheetView()
    }))

    self.present(alert, animated: true, completion: nil)

    timer = Timer.scheduledTimer(timeInterval: 2 , target: self, selector: #selector(self.closeSheetView), userInfo: nil, repeats: false)
}

@objc func closeSheetView(){
    self.dismiss(animated: true, completion: nil)
}

仅供参考 - closeSheetView 方法似乎被调用但 sheet 视图没有关闭。

Answer 1

我只是在我的项目中不使用计时器来完成我使用延迟，也许它对你有用......！

let alert = UIAlertController(title: "", message: "alert disappears after 5 seconds", preferredStyle: .alert)
self.present(alert, animated: true, completion: nil)

// here it work for 5 sec
let when = DispatchTime.now() + 5
DispatchQueue.main.asyncAfter(deadline: when){
  // your code with delay
  alert.dismiss(animated: true, completion: nil)
}

使用计时器关闭 UIAlertController

Dismiss UIAlertController with timer

uikit

ios

swift

uialertcontroller