图像不显示在 uiimageview答案

【问题标题】：image not show in uiimageview图像不显示在 uiimageview
【发布时间】：2019-04-11 12:33:14
【问题描述】：

我想从库中获取图像，但是直到我从库中选择图像才会显示

这是我的代码

@IBAction func btnProfile(_ sender: UIButton) {
        let alert = UIAlertController(title: "Change Profil Image", message: "Pilih Foto", preferredStyle: UIAlertControllerStyle.actionSheet)
        alert.addAction(UIAlertAction(title: "Gunakan Kamera", style: .default, handler: { (action: UIAlertAction!) in
            print("Gunakan Kamera")
            if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.camera){
                let imagePicker = UIImagePickerController()
                imagePicker.delegate = self
                imagePicker.sourceType = UIImagePickerControllerSourceType.camera;
                imagePicker.allowsEditing = false
                self.present(imagePicker, animated: true, completion: nil)
            }
        }))
        alert.addAction(UIAlertAction(title: "Ambil Foto dari Galery", style: .default, handler: { (action: UIAlertAction!) in
            print("Ambil Foto dari Galery")
            if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.photoLibrary){
                let imagePicker = UIImagePickerController()
                imagePicker.delegate = self
                imagePicker.sourceType = UIImagePickerControllerSourceType.photoLibrary;
                imagePicker.allowsEditing = true
                self.present(imagePicker, animated: true, completion: nil)

            }
        }))
        alert.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: { (action: UIAlertAction!) in
            print("Cancel")
        }))
        present(alert, animated: true, completion: nil)
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {

    guard let image = info[.originalImage] as? UIImage else { return } // error in here >> 'UIImage?' is not convertible to 'UIImage' >> and warning yellow >> Cast from 'Slice<Dictionary<UIImagePickerController.InfoKey, Any>>' (aka 'Slice<Dictionary<NSString, Any>>') to unrelated type 'UIImage' always fails

    picker.dismiss(animated: true, completion: nil)

    imgProf.image = image
}

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

我想在 UIimageview 上显示图像，但是从库中检索它后它并不总是出现，保护让图像出错，并在那里警告黄色我用的是 swift 3

这是 UIImagePickerControllerDelegate

public protocol UIImagePickerControllerDelegate : NSObjectProtocol {


    @available(iOS 2.0, *)
    optional public func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any])

    @available(iOS 2.0, *)
    optional public func imagePickerControllerDidCancel(_ picker: UIImagePickerController)
}

【问题讨论】：

@Kamran，我已经更新了
所以您使用的是 Swift 4.2？ Xcode 版本是多少？
swift 4，但我使用的是 xcode 10.0 版
为此您可以尝试info[UIImagePickerController.InfoKey.originalImage.rawValue] 而不是info[.originalImage]
我又出错了 >> 类型 'UIImagePickerController.InfoKey' (aka 'NSString') 没有成员 'originalImage'

标签： swift swift3 uiimageview uiimagepickercontroller

【解决方案1】：

self.present(imagePicker, animated: true, completion: {
    imagePicker.delegate = self
})

在完成中设置选择器委托。

【讨论】：

【解决方案2】：

我试过这段代码，它成功了

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {

        var selectedImageFromPicker: UIImage?
        if let editedImage = info[UIImagePickerControllerEditedImage] as? UIImage {
            selectedImageFromPicker = editedImage
        } else if let originalImage = info[UIImagePickerControllerOriginalImage] as? UIImage {
            selectedImageFromPicker = originalImage
        }

        if let selectedImage = selectedImageFromPicker {
            imgProf.image = selectedImage
        }
        dismiss(animated: true, completion: nil)
    }

感谢@Kamran，您对改变职位的回答是正确的

【讨论】：