目标C iOS 9 lock viewController纵向定位

Question

升级我的项目后做iOS 9.2我的旧代码变得过时

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

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation{
    return UIInterfaceOrientationPortrait;
}

我发现了这个丑陋的解决方案，在收到旋转通知后，视图集旋转(并用动画重新绘制我的视图控制器)：

-(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

您可以使用下面的委托方法进行定向，它可以应用于正在使用代码的类。这3行代码足以锁定你的方向。

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

Answer 2

适用于iOS 9及更高版本的

• 首先确定您的基视图，它是一个导航控制器。

导航控制器的属性：

@property (strong, nonatomic) UINavigationController *mainNavigationController;

将上面的内容替换为：

@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;
}

这样，您不需要删除您的info.plist条目，我们可以仅阻止特定视图的方向。

这对我很有效。