iOS项目锁住横屏时，设置指定控制器横屏

//  直接把代码写在控制器内部即可，方法都是系统自动调用的

#if __IPHONE_OS_VERSION_MAX_ALLOWED < __IPHONE_9_0

- (NSUInteger)supportedInterfaceOrientations

#else

- (UIInterfaceOrientationMask)supportedInterfaceOrientations

#endif

{

return UIInterfaceOrientationMaskLandscape;

}

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation {

//    return UIInterfaceOrientationLandscapeLeft;

return UIInterfaceOrientationLandscapeRight;

}

-(BOOL)shouldAutorotate

{

return NO;

}