目标 C iOS 9 锁定视图控制器纵向



升级后我的项目是否执行iOS 9.2,我的旧代码已过时

-(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,视图设置旋转(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];
}

如何仅在此视图控制器中锁定方向?

您可以使用下面的委托方法进行方向,它可以适用于使用该代码的类。这 3 行代码足以锁定您的方向。

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

适用于 iOS 9 及更高版本

  • 首先确定您的基本视图控制器
  • 假设它是一个导航控制器。

导航控制器的属性:

@property (strong, nonatomic) UINavigationController *mainNavigationController;

将上述内容替换为:

@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,您无需删除 info.plist 条目,我们只能阻止特定视图的方向。

这对我有用。

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