IBOutlet 未被识别为 UIImageView

Question

我试图让用户在单击按钮操作时拍照。我已将 UIImageView 添加到我的视图控制器的情节提要中。我已将此控件的名称设置为 imageView，但是当我实现 imageView.image = image 时，我收到错误“无法在范围内找到 'imageView'”。我也尝试将其设置为 self.imageView = image 并且我收到错误“无法在范围内找到自我”。我不确定为什么找不到连接到@IBOutlet 的 imageView？

    import UIKit

class HomeScreenViewController: UIViewController, UINavigationControllerDelegate, UIImagePickerControllerDelegate {
     @IBOutlet weak var imageView: UIImageView!
     var button: UIButton! {
         imageView.backgroundColor = .secondarySystemBackground
        self.button.backgroundColor = .systemBlue
        
    }
    override func viewDidLoad() {
        super.viewDidLoad()
        
    }
    @IBAction func didTapButton(){
        let picker = UIImagePickerController()
        picker.sourceType = .camera
        picker.delegate = self
        present(picker, animated: true)
    }
}

func imagePickerControllerDidCancel(_ picker: UIImagePickerController){
    picker.dismiss(animated: true, completion: nil)
}

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey: Any])      {
    picker.dismiss(animated: true, completion: nil)
    
    guard let image = info[UIImagePickerController.InfoKey.originalImage] as? UIImage  else {
        return
    }
    
    imageView.image = image
    
}

Answer 1

你的函数不在你的类里面！！您应该将函数放在类中，如下所示：

class HomeScreenViewController: UIViewController, UINavigationControllerDelegate, UIImagePickerControllerDelegate {
    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey: Any]){
       // any code
    }
}