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Question

我正在使用UIViewAnimationOptionTransitionCrossDisolve从一个视图切换到另一个视图。

我遇到的问题是，在转换生效后，我在屏幕顶部有一个20像素的间隙，新的UIViewController向上推，所以屏幕看起来很正常。

我该如何解决这个问题？

这里是我的过渡代码：

- (IBAction)logInButtonTapped 
{ 
    [self performTransition:UIViewAnimationOptionTransitionCrossDissolve]; 
} 

-(void)performTransition:(UIViewAnimationOptions)options 
{ 
    //Step 1: Create your Controllers 
    _frontViewController = [[UINavigationController alloc] initWithRootViewController:[[ViewController alloc] init]]; 
    NSLog(@"ViewController Frame: %@", NSStringFromCGRect(_frontViewController.view.frame)); 
    _frontViewController.wantsFullScreenLayout = NO; 
    self.navigationController.navigationBar.frame = CGRectOffset(self.navigationController.navigationBar.frame, 0.0, -20.0); 
    UIViewController * leftViewController = [[LeftSideViewController alloc] init]; 

    //Step 2: Instantiate your PKRevealController 
    self.revealController = [PKRevealController revealControllerWithFrontViewController:_frontViewController leftViewController:leftViewController rightViewController:nil options:nil]; 

    UIView * fromView, *toView; 

    if ([self.view superview] != nil) 
    { 
     fromView = self.view; 

     toView = self.revealController.view; 

     NSLog(@"After Transition ViewController Frame: %@", NSStringFromCGRect(_frontViewController.view.frame)); 
    } 

    [UIView transitionFromView:fromView toView:toView duration:0.5 
         options:options completion:^(BOOL finished){}]; 
} 

这里是我的NSLog的显示：

2013-04-03 18:14:30.560 AppName[24631:c07] {{0, 0}, {320, 548}} 
2013-04-03 18:14:31.691 AppName[24631:c07] ViewController Frame: {{0, 0}, {320, 568}} 
2013-04-03 18:14:31.692 AppName[24631:c07] After Transition ViewController Frame: {{0, 0}, {320, 548}} 

Answer 1

我固定我的问题。我必须将wantsFullScreenLayout设置为YES。