UIImagePickerViewController解除缓慢

Question

我有一些代码在UIImagePickerViewController选择图像时运行，但是尽管[picker dismissModalViewControllerAnimated:YES];是第一行，它会等到所有代码完成后再解除。我怎么能阻止这种情况发生？

Answer 1

怎么样 -

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