image_picker：如果首先访问相机，则取消按钮在图库中不可见

Question

这就是在我的抖动应用程序中如何打开画廊和照相机。 问题是，我先启动相机，然后打开图库后，我在导航栏中没有找到取消按钮和标题。

但是，如果退出并重新启动该应用程序，然后我首先打开图库，则可以在ios图像选择器中看到标题和取消按钮。

Answer 1

您可以使用此图像选择器插件：-https: //pub.dartlang.org/packages/multi_image_picker#-readme-tab-

该插件基于具有更多功能的原始图像选择器插件。

Answer 2

我在应用程序中遇到了同样的问题。 我的解决方案是：

var imagePicker: UIImagePickerController?

func openCamera() -> Void {
    if UIImagePickerController.isSourceTypeAvailable(.camera) {
        let picker = UIImagePickerController()
        picker.delegate = self
        picker.sourceType = .camera;
        picker.allowsEditing = false
        imagePicker = picker //made this way to avoid forced unwrapping in imagePicker
        self.present(picker, animated: true, completion: nil)
    }
}

func openLibrary() -> Void {
    if UIImagePickerController.isSourceTypeAvailable(.photoLibrary) {
        let picker = UIImagePickerController()
        picker.delegate = self
        picker.sourceType = .photoLibrary;
        picker.allowsEditing = true
        imagePicker = picker
        self.present(picker, animated: true, completion: nil)
    }
}

然后我必须实现这一点：

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
    imagePicker?.dismiss(animated: true, completion: nil)

    uploadImage(resizeImage) //my function to upload the selected image
    imagePicker = nil
}

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

解决方案应用于Swift 4.2