swift - UIAlertView 问题

Question

自从我更新到 Xcode 8 后我就开始遇到这个问题，我不知道它是否完全取决于 Xcode 错误。

我有这个问题:this happens when I add this view to a tab bar .

应该是这样if you do not tie it to anything it remains unchanged .

问题不是我的代码我在下面添加

import UIKit

类 PhotoSelectViewController:UIViewController、UINavigationControllerDelegate、UIImagePickerControllerDelegate {

@IBOutlet weak var imageView: UIImageView!
@IBOutlet weak var selectImageButton: UIButton!

weak var delegate: PhotoSelectViewControllerDelegate?

override func viewDidLoad() {
    super.viewDidLoad()
}

@IBAction func selectImageTapped(_ sender: AnyObject) {
    let imagePicker = UIImagePickerController()
    imagePicker.delegate = self

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

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

    let photoLibraryAction = UIAlertAction(title: "Photo Library", style: .default) { (_) in
        imagePicker.sourceType = .photoLibrary
        self.present(imagePicker, animated: true, completion: nil)
    }
    let cameraAction = UIAlertAction(title: "Camera", style: .default) { (_) in
        imagePicker.sourceType = .camera
        self.present(imagePicker, animated: true, completion: nil)
    }

    actionSheet.addAction(cancelAction)

    if UIImagePickerController.isSourceTypeAvailable(.photoLibrary) {
        actionSheet.addAction(photoLibraryAction)
    }
    if UIImagePickerController.isSourceTypeAvailable(.camera) {
        actionSheet.addAction(cameraAction)
    }

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

    selectImageButton.setTitle("", for: .normal)

}

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
    if let image = info[UIImagePickerControllerOriginalImage] as? UIImage {
        imageView.image = image
        delegate?.photoSelectViewControllerSelectedImage(image: image)
    }
    dismiss(animated: true, completion: nil)
}

协议(protocol) PhotoSelectViewControllerDelegate: 类 { func photoSelectViewControllerSelectedImage(图片:UIImage)

Answer 1

UIAlertView 已弃用。将 UIAlertController 与 preferredStyle 的 UIAlertControllerStyleAlert 一起使用在 iOS 8 上，你可以像下面那样做

let alert = UIAlertController(title: "Alert", message: "Message", preferredStyle: UIAlertControllerStyle.alert)
alert.addAction(UIAlertAction(title: "Click", style: UIAlertActionStyle.default, handler: nil))
self.present(alert, animated: true, completion: nil)