我想将UIImagePickerController的栏样式设置如下，但栏仍然是UIBarStyleBlackTranslucent。是否可以设置UIImagePickerController的条形样式？提前致谢!UIImagePickerController*imagePicker=[[UIImagePickerControlleralloc]init];imagePicker.sourceType=UIImagePickerControllerSourceTypePhotoLibrary;imagePicker.navigationBar.barStyle=UIBarStyleBl