消除关闭视图控制器和呈现新视图控制器之间的延迟

【问题标题】：Remove delay between dismissing viewcontroller and presenting new viewcontroller消除关闭视图控制器和呈现新视图控制器之间的延迟
【发布时间】：2016-06-26 07:11:05
【问题描述】：

我已经成功地关闭了一个视图控制器并展示了一个新的视图控制器，但是新的视图控制器会在一点延迟后出现。如何消除这种延迟？我当前的代码是：

 UIViewController * vcb=self.presentingViewController;

 [self dismissViewControllerAnimated:YES completion:^{

      UIStoryboard * storyBoard=[UIStoryboard storyboardWithName:@"Main" bundle:[NSBundle mainBundle]];
      ContactsViewController * VC=[storyBoard instantiateViewControllerWithIdentifier:@"contactsView"];

      [vcb presentViewController:VC animated:YES completion:nil];

}];

【问题讨论】：

你可以在主线程中使用dispatch_async吗

标签： ios objective-c iphone uiviewcontroller

【解决方案1】：

你必须指出不需要动画过渡。将您的代码更改为...

 UIViewController * vcb=self.presentingViewController;

 [self dismissViewControllerAnimated:YES completion:^{

      UIStoryboard * storyBoard=[UIStoryboard storyboardWithName:@"Main" bundle:[NSBundle mainBundle]];
      ContactsViewController * VC=[storyBoard instantiateViewControllerWithIdentifier:@"contactsView"];

      [vcb presentViewController:VC animated:NO completion:nil];

}];

如果你需要酒泥延迟试试这个...

 UIViewController * vcb=self.presentingViewController;

 [self dismissViewControllerAnimated:NO completion:^{

      UIStoryboard * storyBoard=[UIStoryboard storyboardWithName:@"Main" bundle:[NSBundle mainBundle]];
      ContactsViewController * VC=[storyBoard instantiateViewControllerWithIdentifier:@"contactsView"];

      [vcb presentViewController:VC animated:NO completion:nil];

}];

【讨论】：