UIImageView将不会显示从UIImagePicker中选择的图像

Question

我的imageView没有显示我使用UIImagePicker选择的图片。

这是所有代码：

@IBAction func addImage(_ sender: Any) {
    if !didShowCamera {
        imagePicker = UIImagePickerController()
        imagePicker.delegate = self

        if UIImagePickerController.isSourceTypeAvailable(.camera) {
            imagePicker.sourceType = .camera
            imagePicker.cameraCaptureMode = .photo
        } else {
            imagePicker.sourceType = .photoLibrary
        }

        self.present(imagePicker, animated: true, completion: nil)
    }
}

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
    let image = info[UIImagePickerController.InfoKey.originalImage] as! UIImage
    print(image)
    self.jobImage.image = takenImage
    self.takenImage = image
    didShowCamera = true
    self.dismiss(animated: true, completion: nil)
}

有什么想法如何解决吗？

Answer 1

使用调度主队列

DispatchQueue.main.async {
self.jobImage.image = takenImage
self.takenImage = image
}

Answer 2

我猜想在分配给图像视图时， takenImage为零，您需要takenImage图像分配给takenImage然后再设置为图像视图。 请更新类似的方法，

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
    let image = info[UIImagePickerController.InfoKey.originalImage] as! UIImage
    print(image)
    self.takenImage = image
    self.jobImage.image = takenImage
    didShowCamera = true
    self.dismiss(animated: true, completion: nil)
}

Answer 3

更换

let image = info[UIImagePickerController.InfoKey.originalImage] as! UIImage

同

let selectedImage = info[UIImagePickerControllerOriginalImage] as? UIImage

并检查是否在info.plist中添加了隐私照片库访问权限。

详见[ https://developer.apple.com/library/archive/referencelibrary/GettingStarted/DevelopiOSAppsSwift/WorkWithViewControllers.html#//apple_ref/doc/uid/TP40015214-CH6-SW1][1]