Question

我只需要在纵向方向上拥有一个ViewController。我尝试使用此代码，但它不起作用：

- (NSUInteger)supportedInterfaceOrientations
{
    return UIInterfaceOrientationMaskPortrait;
}

-(BOOL) shouldAutorotate {
    return NO;
}

我也试过了：

AppDelegate.m：

- (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window
{
    NSLog(@"Interface orientations %@", window);
    if(!enablePortrait)
        return UIInterfaceOrientationMaskLandscape|UIInterfaceOrientationMaskPortrait;
    return UIInterfaceOrientationMaskPortrait;
}

AudioViewController.m

- (void) viewWillAppear:(BOOL)animated{

    [super viewWillAppear:YES];

    ((AppDelegate *)[[UIApplication sharedApplication] delegate]).enablePortrait= YES;
}

如果最初iPad处于纵向模式，它会起作用。但如果iPad处于横向模式，当我回到之前的viewController（AudioViewController.m）时，viewController也会保持在横向状态。

我也试过了，我查看了WillAppear.m但没有效果：

[[UIApplication sharedApplication] setStatusBarOrientation:UIInterfaceOrientationPortrait animated:NO];

请帮助我！

感谢您提前。

修改

临时解决方案：

最后我这样做:(它对我有用，但我希望找到更好的解决方案）

- (void) viewWillAppear:(BOOL)animated{

    [super viewWillAppear:YES];

    ((AppDelegate *)[[UIApplication sharedApplication] delegate]).enablePortrait= YES;
    [[UIApplication sharedApplication] setStatusBarOrientation:UIInterfaceOrientationPortrait animated:NO];

    UINavigationController* nc = [[UINavigationController alloc] init];
    [self.navigationController presentViewController:nc animated:NO completion:^{
    }];
    [self.navigationController dismissViewControllerAnimated:YES completion:^{
    }];
}

Answer 1

-(BOOL)shouldAutorotate{
    if (self.interfaceOrientation == UIInterfaceOrientationPortrait) {
        return YES;
    }
    else {
        return NO;
    }
}

- (NSUInteger)supportedInterfaceOrientations
{
    return UIInterfaceOrientationMaskPortrait;
}

请将您的supportedInterfaceOrientations方法设为相同。如果有帮助，请告诉我.. :)

Answer 2

在APPDelegate类中使用它来使viewcontroller始终处于纵向：- (NSUInteger) application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window { return UIInterfaceOrientationMaskPortrait; }

Answer 3

尝试this可能对您有帮助。

Set Landscape Orientation for iPad Only NOT iPhone

Answer 4

最后我这样做:(它对我有用，但我希望找到更好的解决方案）

- (void) viewWillAppear:(BOOL)animated{

    [super viewWillAppear:YES];

    ((AppDelegate *)[[UIApplication sharedApplication] delegate]).enablePortrait= YES;
    [[UIApplication sharedApplication] setStatusBarOrientation:UIInterfaceOrientationPortrait animated:NO];

    UINavigationController* nc = [[UINavigationController alloc] init];
    [self.navigationController presentViewController:nc animated:NO completion:^{
    }];
    [self.navigationController dismissViewControllerAnimated:YES completion:^{
    }];
}

Objective C只在viewcontroller中纵向定位

4 个答案: