IOS 7 +對於力控制方向爲縱向

Question

我用下面的代碼爲IO6及以下強制旋轉：

-(void) viewWillAppear:(BOOL)animated 
{ 
    [super viewWillAppear:animated]; 
    UIApplication* application = [UIApplication sharedApplication]; 
    if (application.statusBarOrientation != UIInterfaceOrientationPortrait) 
    { 
     UIViewController *c = [[UIViewController alloc]init]; 
     [c.view setBackgroundColor:[UIColor redColor]]; 
     [self.navigationController presentViewController:c animated:NO completion:^{ 
      [self.navigationController dismissViewControllerAnimated:NO completion:^{ 
      }]; 
     }]; 
    } 
} 

但它不是在IOS7正常工作，其旋轉視圖控制器，但重新設置空白視圖在屏幕上......

你能幫助我在IOS 7解決這個問題...

Answer 1

改變這一行：

[self.navigationController dismissViewControllerAnimated:NO completion:^{ 
    }]; 

要這樣：

[self.navigationController dismissViewControllerAnimated:YES completion:^{ 
    }];