UIAlertAction按钮文本对齐

Question

我想对齐UIAlertAction文本对齐左，并添加图标，如图像所示。我花了很多时间在谷歌上得到解决方案，但没有找到正确的答案。每个正文张贴的警告标题，而不是警报动作标题。

​

请给我推荐去的正确路线。

谢谢！！

Answer 1

您可以使用下面的示例代码来实现这一点。简单又简单。

Swift 4

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

let cancelActionButton = UIAlertAction(title: "Cancel", style: .cancel, handler: nil)
actionSheetAlertController.addAction(cancelActionButton)


let documentsActionButton = UIAlertAction(title: "Documents", style: .default, handler: nil)
actionSheetAlertController.addAction(documentsActionButton)
documentsActionButton.setValue(#imageLiteral(resourceName: "doccument"), forKey: "image")
documentsActionButton.setValue(kCAAlignmentLeft, forKey: "titleTextAlignment")

let cameraActionButton = UIAlertAction(title: "Camera", style: .default, handler: nil)
actionSheetAlertController.addAction(cameraActionButton)
cameraActionButton.setValue(#imageLiteral(resourceName: "camera"), forKey: "image")
cameraActionButton.setValue(kCAAlignmentLeft, forKey: "titleTextAlignment")

let galleryActionButton = UIAlertAction(title: "Gallery", style: .default, handler: nil)
actionSheetAlertController.addAction(galleryActionButton)
galleryActionButton.setValue(#imageLiteral(resourceName: "gallery"), forKey: "image")
galleryActionButton.setValue(kCAAlignmentLeft, forKey: "titleTextAlignment")

actionSheetAlertController.view.tintColor = kTHEME_COLOR
self.present(actionSheetAlertController, animated: true, completion: nil)

Answer 2

kCAAlignmentLeft的更新版本为CATextLayerAlignmentMode.left ( @Niraj here回答)，因此代码如下所示：

Swift 5.0

documentsActionButton.setValue(CATextLayerAlignmentMode.left, forKey: "titleTextAlignment")

Answer 3

您可以使用下面的示例代码来实现这一点。用图像替换图像名称

Swift 3

 let actionSheet = UIAlertController(title: nil, message: nil, preferredStyle: .actionSheet)
 let camera = UIAlertAction(title: "Camera", style: .default) { (action) in
  // Do something
 }
 let cameraImage = UIImage(named: "icon_camera")
 camera.setValue(cameraImage, forKey: "image")
 camera.setValue(0, forKey: "titleTextAlignment")
 actionSheet.addAction(camera)