Question

我有父视图控制器和另一个模态视图控制器。我在父母的上下文中提出了模态视图控制器：

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

父viewController不会定位Landscape;所以，我在父viewController中添加了这些方法：

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


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

呈现的viewController（模态呈现）应该指向所有可能的方向;所以，我添加了这些方法：

- (NSUInteger)supportedInterfaceOrientations{
    return UIInterfaceOrientationMaskAll;
}

-(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation{

    return YES;
}

但是，因为我假设（UIModalPresentationCurrentContext），所呈现的viewController在IOS 5.0中没有定位，而它在IOS 5.0中按预期工作

请问如何解决这个问题？

Answer 1

如果你有一个基于标签的应用，那么首先在app delegate和self.window.rootviewcontroller-self.tabbarcontroller中添加一些代码。

        @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;
    }

更改该课程的方向

-(BOOL)shouldAutorotate
{
    return NO;
}

-(NSUInteger)supportedInterfaceOrientations
{
    return UIInterfaceOrientationMaskLandscapeRight;
}

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return UIInterfaceOrientationLandscapeRight;
}

Answer 2

你应该实施

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation;

例如： -

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return UIInterfaceOrientationMaskAll;
}

IOS视图控制器方向

2 个答案: