ios UIImagePickerController与UITabbar问题

Question

嗨，我在使用UIImagePickerController时遇到问题，而不是点击后选择相机中的照片后，该标签栏显示如上图所示任何人都面临这个问题而不是帮助我。问题仅在于ios 7。在ios 8中它完美无缺。

 UIImagePickerController *picker = [[UIImagePickerController alloc] init];
 picker.delegate = self;
 picker.allowsEditing = YES;
 picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
 [self presentViewController:picker animated:YES completion:NULL];