向 PresentViewController 添加延迟

Question

我想知道如何在我的代码中添加 1.0 秒的延迟：

UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
UIViewController *homeViewController = (UIViewController *)[storyboard instantiateViewControllerWithIdentifier:@"HomeViewController"];
[self presentViewController:homeViewController animated:YES completion:nil];

我知道你可以这样做：

[self performSelector:@selector(showModalTwo:)withObject:someNumber afterDelay:1.0f];

我只是没有这个或想创建一个函数来进行 segue。任何帮助都会很棒。谢谢！

Answer 1

不建议为等待操作完成（即登录）添加延迟，您可以使用 Grand Central Dispatch

dispatch_async(dispatch_get_global_queue( DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^(void){
        //Background Thread
        // do you login logic here

        dispatch_async(dispatch_get_main_queue(), ^(void){
            //Main Thread : UI Updates
            UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
            UIViewController *homeViewController = (UIViewController *)[storyboard instantiateViewControllerWithIdentifier:@"HomeViewController"];
            [self presentViewController:homeViewController animated:YES completion:nil];

        });
    });