ios - SLComposeViewController 出现缓慢

Question

SLComposeViewController 在呈现后需要 3-4 秒才能出现。但是 presentViewController:(UIViewController *) animated:(BOOL) completion:^(void)completion 方法完成 block 会立即被调用。因此，即使我使用加载指示器，它也会在眨眼间消失。相关代码如下。顺便说一句，我试过 dispatch_async 它没有用。

我怎样才能加快这个过程，你有什么想法吗？

SLComposeViewController *shareView = [SLComposeViewController composeViewControllerForServiceType: SLServiceTypeFacebook];
[shareView setTitle:@"Title"];
[shareView setInitialText:@"Description"];
[shareView addURL:[NSURL URLWithString:@"http://www.google.com/"]];
[shareView setCompletionHandler:^(SLComposeViewControllerResult result) {

    switch (result) {
        case SLComposeViewControllerResultCancelled:
        {
            NSLog(@"Facebook Post Canceled");
            break;
        }
        case SLComposeViewControllerResultDone:
        {
            NSLog(@"Facebook Post Successful");
            break;
        }
        default:
            break;
    }
}];

UIActivityIndicatorView *activityView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
activityView.center = CGPointMake([UIScreen mainScreen].bounds.size.width / 2.0, [UIScreen mainScreen].bounds.size.height / 2.0);
[activityView startAnimating];
[self.view addSubview:activityView];

[self presentViewController:shareView animated:YES completion:^{
    NSLog(@"Presented facebook");
    [activityView removeFromSuperview];
}];

Answer 1

因此，这不是解决方法，但它可能会帮助您解决问题。我无法让事情显示得更快，我认为它只是在显示自身之前引入数据的实现。

由于 presentViewController 完成几乎立即执行，我的解决方法是显示一个进度 View ，并设置一个选择器在 2 秒后执行。选择器只是隐藏了进度 View ，这是一个示例。

[MBProgressHUD showHUDAddedTo:self.view animated:YES];
[self performSelector:@selector(hideProgressView) withObject:nil afterDelay:2.0f];

[self presentViewController:self.composeViewController animated:YES completion:nil];


- (void)hideProgressView
{
    [MBProgressHUD hideHUDForView:self.view animated:YES];
}