iOS視圖控制器方向

Question

我有父視圖控制器和另一個模式視圖控制器。 我在父級上下文中介紹了模式視圖控制器：

readingViewController * reading_view_controller = [[readingViewController alloc] initWithNibName:@"readingViewController" bundle:nil];
[self setModalPresentationStyle:UIModalPresentationCurrentContext];
[self presentModalViewController:reading_view_controller animated:YES];

父viewController不會定向Landscape； 因此，我在父viewController中添加了以下方法：

- (NSUInteger)supportedInterfaceOrientations{
    return UIInterfaceOrientationMaskPortraitUpsideDown|UIInterfaceOrientationMaskPortrait;
}


-(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation{
    return (toInterfaceOrientation == UIInterfaceOrientationPortrait || toInterfaceOrientation == UIInterfaceOrientationPortraitUpsideDown);
}

所呈現的viewController（以模態呈現）應朝向所有可能的方向； 因此，我添加了以下方法：

- (NSUInteger)supportedInterfaceOrientations{
    return UIInterfaceOrientationMaskAll;
}

-(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation{

    return YES;
}

但是，由於我假設（UIModalPresentationCurrentContext），因此呈現的viewController在IOS 6.0中無法正常工作，而在IOS 5.0中卻按預期工作

請問如何解決這個問題？

Answer 1

如果您有一個基於選項卡的應用程序，則首先在應用程序委托中添加一些代碼，並在self.window.rootviewcontroller-self.tabbarcontroller添加一些代碼。

        @implementation UITabBarController (SK8FASTR2App)
        -(BOOL)shouldAutorotate
        {
            return YES;
        }

        - (NSUInteger)supportedInterfaceOrientations
        {
            // your custom logic for rotation of selected tab
             if (self.selectedIndex==3){
             return UIInterfaceOrientationMaskPortrait;
             }
             else {
            UIInterfaceOrientationMaskPortrait|UIInterfaceOrientationMaskPortraitUpsideDown|UIInterfaceOrientationLandscapeLeft|UIInterfaceOrientationLandscapeRight;
             return UIInterfaceOrientationMaskAll;
             }

        }

        @end



        before

        @implementation AppDelegate


    - (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window {
            return  UIInterfaceOrientationMaskAll;
    }

改變那個班級的方向

-(BOOL)shouldAutorotate
{
    return NO;
}

-(NSUInteger)supportedInterfaceOrientations
{
    return UIInterfaceOrientationMaskLandscapeRight;
}

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return UIInterfaceOrientationLandscapeRight;
}

Answer 2

你應該實現

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation;

例如：-

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return UIInterfaceOrientationMaskAll;
}