消除解雇ViewController和展示新ViewController之間的延遲

Question

我已經成功解雇了一個視圖控制器，並提出了一個新的視圖控制器，但是新的視圖控制器在稍有延遲之后就出現了。 如何消除該延遲？ 我當前的代碼是：

 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];

}];

Answer 1

您必須指出不需要動畫過渡。 將您的代碼更改為...

 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];

}];

而且，如果您需要酒糟延遲，請嘗試...

 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];

}];