Question

我正在为iPad制作相机应用程序。我希望相机应用程序仅在纵向模式下工作。我必须进行旋转观察，并强制设备使用纵向模式，如下所示：

我认为这是私有API;该帖子中的一些用户表示它是。

如果是这样，我可以使用哪些其他工作来强制叠加层仅保持纵向模式？如果我不添加此代码，它将旋转为纵向和横向模式。

    //Is this private?
    @interface UIDevice ()
    -(void)setOrientation:(UIDeviceOrientation)orientation;
    @end

    -(IBAction)InitiateCamera
    {

    overlayview = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 768, 1024)];
    ...
    ...

    //monitor device rotation
        [[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
            [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(didRotate:) name:UIDeviceOrientationDidChangeNotification object:nil];




        //launch camera
        [self presentViewController:picpicker animated:YES completion:nil];


    }



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


//IS THIS PRIVATE?
        //Maintain the camera in portrait orientation
        [[UIDevice currentDevice] setOrientation:UIInterfaceOrientationPortrait];

    }

    - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
    {
        return UIInterfaceOrientationIsPortrait(interfaceOrientation);
    }

    -(NSUInteger)supportedInterfaceOrientations
    {

        return UIInterfaceOrientationMaskPortrait;
    }

    - (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
    {
        return UIInterfaceOrientationPortrait;
    }

Answer 1

请改用此代码。我提交了一个应用程序并在itunes上获得批准

- (void) didRotate:(NSNotification *)notification
{
    [[UIDevice currentDevice] performSelector:NSSelectorFromString(@"setOrientation:") withObject:(__bridge id)((void*)UIInterfaceOrientationPortrait)];

}

Answer 2

是的。虽然orientation标题中显示UIDevice属性，但该标题中的标记为 readonly 。

私有的替代 - [UIDevice setOrientation：]用于强制相机覆盖进入纵向模式

2 个答案: