swift – UIAlertController – 将自定义视图添加到操作表

当我们尝试附加一个图像在屏幕截图中时，我正在尝试制作在iOS上的消息应用程序中显示的操作。

我在新的UIAlertController中意识到，我们无法适应任何自定义视图。我可以做什么这样做吗？

我的代码看起来很标准

let alertController = UIAlertController(title: "My AlertController",message: "tryna show some images here man",preferredStyle: UIAlertControllerStyle.ActionSheet)

        let okAction = UIAlertAction(title: "oks",style: .Default) { (action: UIAlertAction) -> Void in
        alertController.dismissViewControllerAnimated(true,completion: nil)
    }
    let cancelAction = UIAlertAction(title: "Screw it!",style: .Cancel) { (action: UIAlertAction) -> Void in
        alertController.dismissViewControllerAnimated(true,completion: nil)
    }

    alertController.addAction(okAction)
    alertController.addAction(cancelAction)

    self.presentViewController(alertController,animated: true,completion: nil)

UIAlertController扩展了UIViewController，它具有一个view属性。您可以将该视图的子视图添加到您心中的愿望。唯一的麻烦是正确地调整警报控制器的大小。你可以做这样的事情，但是这可能会在下次苹果调整UIAlertController的设计时轻松破解。

Swift 3

let alertController = UIAlertController(title: "\n\n\n\n\n\n",message: nil,preferredStyle: UIAlertControllerStyle.actionSheet)

    let margin:CGFloat = 10.0
    let rect = CGRect(x: margin,y: margin,width: alertController.view.bounds.size.width - margin * 4.0,height: 120)
    let customView = UIView(frame: rect)

    customView.backgroundColor = .green
    alertController.view.addSubview(customView)

    let somethingAction = UIAlertAction(title: "Something",style: .default,handler: {(alert: UIAlertAction!) in print("something")})

    let cancelAction = UIAlertAction(title: "Cancel",style: .cancel,handler: {(alert: UIAlertAction!) in print("cancel")})

    alertController.addAction(somethingAction)
    alertController.addAction(cancelAction)

    DispatchQueue.main.async {
        self.present(alertController,completion:{})
    }

迅速

let alertController = UIAlertController(title: "\n\n\n\n\n\n",preferredStyle: UIAlertControllerStyle.actionSheet)

let margin:CGFloat = 10.0
let rect = CGRect(x: margin,height: 120)
let customView = UIView(frame: rect)

customView.backgroundColor = .green
alertController.view.addSubview(customView)

let somethingAction = UIAlertAction(title: "Something",handler: {(alert: UIAlertAction!) in print("something")})

let cancelAction = UIAlertAction(title: "Cancel",handler: {(alert: UIAlertAction!) in print("cancel")})

alertController.addAction(somethingAction)
alertController.addAction(cancelAction)

self.present(alertController,completion:{})

Objective-C的

UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"\n\n\n\n\n\n" message:nil preferredStyle:UIAlertControllerStyleActionSheet];

  CGFloat margin = 8.0F;
  UIView *customView = [[UIView alloc] initWithFrame:CGRectMake(margin,margin,alertController.view.bounds.size.width - margin * 4.0F,100.0F)];
  customView.backgroundColor = [UIColor greenColor];
  [alertController.view addSubview:customView];

  UIAlertAction *somethingAction = [UIAlertAction actionWithTitle:@"Something" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {}];
  UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleCancel handler:^(UIAlertAction *action) {}];
  [alertController addAction:somethingAction];
  [alertController addAction:cancelAction];
  [self presentViewController:alertController animated:YES completion:^{}];

话虽如此，一个不那么诡异的方法就是使你自己的视图子类与UIAlertController的UIAlertActionStyle布局类似。事实上，相同的代码在iOS 8和iOS 9中看起来略有不同。

iOS 8

iOS 9

iOS 10

swift – UIAlertController – 将自定义视图添加到操作表

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