iphone - 更改 UIimagePickerController 的默认选项

Question

拍照后显示重拍、预览和使用按钮。我需要将使用按钮更改为保存按钮。可以吗？

UIImagePickerController * imagePicker = [[UIImagePickerController alloc] init];
        imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
        imagePicker.delegate = self;
        [self presentModalViewController:imagePicker animated:YES];