ios - Xcode - 图像在用户选择后未出现在 UIImageView 中

Question

我正在尝试制作一个应用程序，您可以在其中“撰写”假推文，但我的代码似乎没有将用户选择的图像添加到我为 Twitter 个人资料图片设置的 UIImageView。

class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate{    
    @IBOutlet weak var twitterName: UILabel!    
    @IBOutlet weak var twitterUsername: UILabel!    
    @IBOutlet weak var twitterProfilePic: UIImageView!    
    @IBOutlet weak var twitterTweet: UILabel!    
    @IBOutlet weak var inputTwitterName: UITextField!    
    @IBOutlet weak var inputTwitterUsername: UITextField!    
    @IBOutlet weak var inputTweet: UITextField!    
    @IBAction func chooseTwitterImage(_ sender: Any) {        

    let profilePic = UIImagePickerController()
    profilePic.delegate = self        
    profilePic.sourceType = UIImagePickerControllerSourceType.photoLibrary        
    profilePic.allowsEditing = false        
    self.present(profilePic, animated: true)
}

@IBAction func makeTweetButton(_ sender: Any) {        
    twitterName.text = (inputTwitterName.text)!        
    twitterUsername.text = (inputTwitterUsername.text)!        
    twitterTweet.text = (inputTweet.text)!        

    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
        if let profilePic = info[UIImagePickerControllerOriginalImage] as? UIImage
        {
            twitterProfilePic.image = profilePic                
        }                
        else
        {                
            print("ERROR PICKING IMAGE")                
        }
    }        
}

它似乎对 UIImageView 没有任何影响...帮助。

Answer 1

将 didFinishPickingMediaWithInfo 嵌套方法移动到 ViewController 的类中可以解决问题。