问以编程方式更改定向接口

EN

[[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
[[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(orientationChanged:)
                                                 name:UIDeviceOrientationDidChangeNotification
                                               object:nil];

- (void)orientationChanged:(NSNotification *)notification
{
    // Get device orientation
    UIDeviceOrientation deviceOrientation   = [UIDevice currentDevice].orientation;

    if (UIDeviceOrientationIsPortrait(deviceOrientation))
    {
        // Portrait
    }
    else if(UIDeviceOrientationIsLandscape(deviceOrientation))
    {
        // Landscape
    }
}