Question

升级后，我的项目执行iOS 9.2我的旧代码已过时

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

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation{
    return UIInterfaceOrientationPortrait;
}

在收到旋转通知视图设置旋转（并用动画我的视图控制器重绘）后，我发现了这个丑陋的解决方案：

-(void)didRotate:(NSNotification *)notification
{

        [UIView animateWithDuration:0 animations:^{
            NSNumber *value = [NSNumber numberWithInt:UIInterfaceOrientationPortrait];
            [[UIDevice currentDevice] setValue:value forKey:@"orientation"];
        }];       
 }

- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];

    [[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];

    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(didRotate:)
                                                 name:UIDeviceOrientationDidChangeNotification
                                               object:nil];

}

-(void)viewWillDisappear:(BOOL)animated
{
        [super viewWillDisappear:YES];

        [[NSNotificationCenter defaultCenter] removeObserver:self name:UIDeviceOrientationDidChangeNotification object:nil];
}

如何仅在此ViewController中锁定方向？

Answer 1

适用于iOS 9及以上版本

首先确定您的基本视图控制器
假设它是导航控制器。

导航控制器的属性：

@property (strong, nonatomic) UINavigationController *mainNavigationController;

将以上内容替换为：

@property (strong, nonatomic) MainNavigationContrller *mainNavigationController;

您的MainNavigationContrller.m将如下所示：

@interface MainNavigationContrller ()

@end

@implementation MainNavigationContrller

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
}

- (BOOL)shouldAutorotate
{
    return YES;
}
- (UIInterfaceOrientationMask)supportedInterfaceOrientations
{
    if(IPHONE)
    {
        UIViewController *topVC = ((AppDelegate*)[[UIApplication sharedApplication] delegate]).yourNavigationController.topViewController;
        if([topVC isKindOfClass:[yourViewController class]])
        {
            return UIInterfaceOrientationMaskPortrait;
        }
    }

    return UIInterfaceOrientationMaskAll;
}

有了这个，你不需要删除你的info.plist条目，我们可以阻止特定视图的方向。

这是为我工作的。

Answer 2

您可以使用以下委托方法作为方向，它可以适用于使用代码的类。这3行代码足以锁定您的方向。

- (UIInterfaceOrientationMask)supportedInterfaceOrientations {
    return (UIInterfaceOrientationMaskPortrait);
}

Objective C iOS 9锁定viewController纵向方向

2 个答案: