Question

我正在尝试创建一个UIAlertAction，该按钮的按钮具有黑色文本，我也想分配图像：

let alert = UIAlertController(title: nil,
                              message: nil,
                              preferredStyle: .actionSheet)
let image = UIImage(named: "actionSheetGallery")
let action = UIAlertAction(title: "Choose Picture From Gallery", style: .default, handler: selectFromGallery)

action.setValue(image, forKey: "image")

let image1 = UIImage(named: "actionSheetCamera")
let action1 = UIAlertAction(title: "Take Picture from Camera", style: .default, handler: takePhoto)
action1.setValue(image1, forKey: "image")

let cancelAction = UIAlertAction(title: "Cancel",
                                 style: .cancel, handler: nil)

alert.addAction(action1)
alert.addAction(action)
alert.addAction(cancelAction)

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

我可以分配图像或文本颜色，我们如何分配两者。并且您看到的图像背景也会发生变化。

Answer 1

我认为action1.setValue(image1, forKey: "image")可能很危险：当您使用私有api时，Apple可能拒绝您的应用程序。可以，有时我使用私有api，什么也没发生。

无论如何，如果要更改文本颜色，可以为警报控制器的视图设置淡色：

alert.view.tintColor = .orange // or whatever

如果您确实要放置图像，则图像本身将继承视图的色调颜色（默认为蓝色）。为了避免使用色彩，可以更改图像的渲染模式：

let image = UIImage(named: "actionSheetGallery")?.withRenderingMode(.alwaysOriginal)

Answer 2

此行是非法的：

action1.setValue(image1, forKey: "image")

UIAlertAction无法包含图像。如果要自定义操作表的外观，请创建自己的呈现视图控制器（毕竟，这实际上是警报控制器的全部）。

Answer 3

尝试以下功能

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

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

        return
    })

    let image = resizeImage(image: #imageLiteral(resourceName: "twitter"), targetSize: CGSize(width: 25, height: 25))
    let unLike = UIAlertAction(title: "UNLIKE", style: .destructive, handler: { (action: UIAlertAction!) in


        return
    })
    unLike.setValue(image.withRenderingMode(UIImage.RenderingMode.alwaysOriginal), forKey: "image")
    refreshAlert.addAction(cancel)
    refreshAlert.addAction(unLike)
    refreshAlert.view.tintColor = UIColor.black
    self.present(refreshAlert, animated: true, completion: nil)
}

Answer 4

您可以通过以下方式实现上述目标：

let actionSheet = UIAlertController(title: nil, message: nil, preferredStyle: .actionSheet)
let actionCamera = UIAlertAction(title: "Camera", style: .default, handler: { (_) -> Void in
    //code for camera
})
actionCamera.setValue(UIImage(named: "imageName")?.withRenderingMode(.alwaysOriginal), forKey: "image")

actionCamera.setValue(CATextLayerAlignmentMode.left, forKey: "titleTextAlignment")
actionSheet.addAction(actionCamera)

actionSheet.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))
actionSheet.view.tintColor = UIColor.black
self.present(actionSheet, animated: true, completion: nil)

希望它会有所帮助;）

如何分配UIAlertAction图像并更改标题颜色

4 个答案: