iphone - UIImagePickerViewController 关闭缓慢

Question

我有一些代码在 UIImagePickerViewController 选择图像时运行，但尽管[picker dismissModalViewControllerAnimated:YES];是第一行，但它会等到所有代码完成后才会关闭。我怎样才能阻止这种情况发生？

Answer 1

怎么样 -

[picker dismissViewControllerAnimated:YES completion:^(void){
    // stuff I want to do...
}];