强制横竖屏间切换

if ([[UIDevice currentDevice] respondsToSelector:@selector(setOrientation:)]) {
        SEL selector = NSSelectorFromString(@"setOrientation:");
        
        if (UIDeviceOrientationIsLandscape([[UIDevice currentDevice] orientation])) {
            NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:[UIDevice instanceMethodSignatureForSelector:selector]];
            [invocation setSelector:selector];
            [invocation setTarget:[UIDevice currentDevice]];
            int val = UIInterfaceOrientationPortrait;//
            [invocation setArgument:&val atIndex:2];
            [invocation invoke];
        }else{
            NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:[UIDevice instanceMethodSignatureForSelector:selector]];
            [invocation setSelector:selector];
            [invocation setTarget:[UIDevice currentDevice]];
            int val = UIInterfaceOrientationLandscapeRight;//
            [invocation setArgument:&val atIndex:2];
            [invocation invoke];
        }
    }

 

 

//屏幕旋转
-(BOOL)shouldAutorotate{
    return YES;
}
//支持旋转的方向
//一开始的屏幕旋转方向
//支持旋转的方向
//一开始的屏幕旋转方向
- (NSUInteger)supportedInterfaceOrientations
{
    NSLog(@"11222111111");

    return UIInterfaceOrientationLandscapeLeft;
}
- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return UIInterfaceOrientationLandscapeLeft;
}