将图像添加到 UIAlertController

Question

这是我的警报，效果很好。我想向警报中添加一个图像，当警报出现时，它会在文本旁边显示，如果它有所作为，我会在 SpriteKit 中的 SKScene 中。

var alertController = UIAlertController(title: "How to Skate", message: "Tap the screen to perform a trick and jump over the obsticles (You can grind on rails) The game will end when you hit a highlighted red, orange or yellow obstacle. That's it! + Image", preferredStyle: UIAlertControllerStyle.Alert)     
alertController.addAction(UIAlertAction(title: "Cool!", style: UIAlertActionStyle.Cancel, handler: nil))
self.view?.window?.rootViewController?.presentViewController(alertController, animated: true, completion: nil)

Answer 1

您可以将UIImageView 作为子视图添加到您的UIAlertController。

var imageView = UIImageView(frame: CGRectMake(220, 10, 40, 40))
imageView.image = yourImage
alert.view.addSubview(imageView)

这就是你在UIAlertController中的做法：

let alertMessage = UIAlertController(title: "My Title", message: "My Message", preferredStyle: .Alert)

let image = UIImage(named: "myImage")
var action = UIAlertAction(title: "OK", style: .Default, handler: nil)
action.setValue(image, forKey: "image")
alertMessage .addAction(action)

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

Answer 2

    let alertMessage = UIAlertController(title: "My Title", message: "", preferredStyle: .alert)
    let action = UIAlertAction(title: "OK", style: .default, handler: nil)
    action.setValue(UIImage(named: "task1.png")?.withRenderingMode(UIImageRenderingMode.alwaysOriginal), forKey: "image")
    alertMessage .addAction(action)
    self.present(alertMessage, animated: true, completion: nil)

斯威夫特 3

Answer 3

你可以这样做。

    let imageView = UIImageView(frame: CGRectMake(220, 10, 40, 40))
   // imageView.image = UIImage(named: "ic_no_data")
    let alertMessage = UIAlertController(title: "My Title", message: "", preferredStyle: .Alert)

    let image = UIImage(named: "Image")
    let action = UIAlertAction(title: "OK", style: .Default, handler: nil)
    action.setValue(image, forKey: "image")
    alertMessage .addAction(action)

    self.presentViewController(alertMessage, animated: true, completion: nil)
    alertMessage.view.addSubview(imageView)

Answer 4

如果您愿意使用私有 API，您可以使用私有 attributedMessage 属性将属性字符串设置为包含图像的消息：

来源：https://github.com/JaviSoto/iOS10-Runtime-Headers/blob/master/Frameworks/UIKit.framework/UIAlertController.h

let actionSheet = UIAlertController(title: "title", message: nil, preferredStyle: .actionSheet)

let str = NSMutableAttributedString(string: "Message\n\n", attributes: [NSAttributedStringKey.font: UIFont.preferredFont(forTextStyle: .caption1), NSAttributedStringKey.foregroundColor: UIColor.gray])

let attachment = NSTextAttachment()

attachment.image = --> yourImage <--

str.append(NSAttributedString(attachment: attachment))

actionSheet.setValue(str, forKey: "_attributedMessage")

同样，这是一个私有 API，因此可能会在任何版本中更改，恕不另行通知。慎用！

Answer 5

SWIFT 4 +

        let refreshAlert = UIAlertController(title: "Unlike Article", message: "Are you sure you want to unlike this Article?", preferredStyle: UIAlertControllerStyle.alert)



        let cancel = UIAlertAction(title:  "CANCEL", style: .default, handler: { (action: UIAlertAction!) in



            return
        })

        let image = #imageLiteral(resourceName: "dislike_icon").resizedImage(newSize: CGSize(width: 25, height: 25))
        let unLike = UIAlertAction(title: "UNLIKE", style: .destructive, handler: { (action: UIAlertAction!) in
            self.articleUnLiking()


            return
        })
        unLike.setValue(image.withRenderingMode(UIImageRenderingMode.alwaysOriginal), forKey: "image")
        refreshAlert.addAction(cancel)
        refreshAlert.addAction(unLike)
        self.present(refreshAlert, animated: true, completion: nil)

注意：- 同样，这是一个私有 API，因此可能会在任何版本中更改，恕不另行通知。慎用！

谢谢

Answer 6

向 UIAlertController 添加图像

请尝试以下代码 Swift 4 +

1. 添加alertView控制器

   let alert = UIAlertController(title: title, message: msg, preferredStyle: UIAlertControllerStyle.alert) 让 image = UIImage(named:"feet")! alert.addImage（图像：图像） alert.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.default, handler: nil)) // 显示警报 self.present(alert, 动画: true, 完成: nil)

2. 添加扩展 UIAlertController

   func addImage(image: UIImage) {

   let maxSize = CGSize(width: 240, height: 244)
   let imgSize = image.size
   var ratio:CGFloat!
   if (imgSize.width > imgSize.height){
       ratio = maxSize.width / imgSize.width
   }else {
       ratio = maxSize.height / imgSize.height
   }
   let scaleSize = CGSize(width: imgSize.width*ratio, height: imgSize.height*ratio)
   var resizedImage = image.imageWithSize(scaleSize)
   
   if (imgSize.height > imgSize.width) {
       let left = (maxSize.width - resizedImage.size.width) / 2
       resizedImage = resizedImage.withAlignmentRectInsets(UIEdgeInsetsMake(0, -left, 0, 0))
   }
   
   let imgAction = UIAlertAction(title: "", style: .default, handler: nil)
   imgAction.isEnabled = false
   imgAction.setValue(resizedImage.withRenderingMode(.alwaysOriginal), forKey: "image")
   
   self.addAction(imgAction)
   

   }

添加图像视图扩展

扩展 UIImage {

func imageWithSize(_ size:CGSize) -> UIImage {
    var scaledImageRect = CGRect.zero

    let aspectWidth:CGFloat = size.width / self.size.width
    let aspectHeight:CGFloat = size.height / self.size.height
    let aspectRatio:CGFloat = min(aspectWidth, aspectHeight)

    scaledImageRect.size.width = self.size.width * aspectRatio
    scaledImageRect.size.height = self.size.height * aspectRatio
    scaledImageRect.origin.x = (size.width - scaledImageRect.size.width) / 2.0
    scaledImageRect.origin.y = (size.height - scaledImageRect.size.height) / 2.0

    UIGraphicsBeginImageContextWithOptions(size, false, 0)

    self.draw(in: scaledImageRect)

    let scaledImage = UIGraphicsGetImageFromCurrentImageContext()
    UIGraphicsEndImageContext()

    return scaledImage!
}

}

Answer 7

目前，在不使用私有 api 或其他黑客的情况下，使用 UIAlertController 并没有真正的正确方法，因为根据文档，您不应该修改警报视图控制器的视图层次结构。所以最好的解决方案是为此创建一个自定义视图。但是，如果您不关心一些额外的边框，那么在 UITextField 中使用属性字符串可以：

alertController.addTextField { field in
    let attachment = NSTextAttachment()
    attachment.image = image
    attachment.bounds = CGRect(x: 0, y: 0, width: 226, height: 226)
    field.attributedPlaceholder = NSAttributedString(attachment: attachment)
    field.textAlignment = .center
    field.isEnabled = false
}