如何判断didFinishPickingMediaWithInfo返回的图像是来自相机还是photoalbum？

Question

我有一个视图控制器，需要能够从相册和相机中选择一张图片。我只能为didFinishPickingMediaWithInfo提供一个委托方法，虽然我可以判断它是否是一个图像，我似乎无法判断它是来自相册还是来自相机（我需要先将它保存在相册中）。信息中有什么可以帮我区分这两个吗？

...谢谢

Answer 1

因为UIImagePickerController已传递给方法，所以您只需要：

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
  if ([picker sourceType] == UIImagePickerControllerSourceTypeCamera) {
    // Do something with an image from the camera
  } else {
    // Do something with an image from another source
  }
}

Answer 2

在Swift3中：

func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject : AnyObject]) {

    if picker.sourceType == .camera {
      // Do something with an image from the camera
    }
    else {
      // Do something with an image from another source
    }

  }