强制横屏

 NSNumber *resetOrientationTarget = [NSNumber numberWithInt:UIInterfaceOrientationUnknown];
 [[UIDevice currentDevice] setValue:resetOrientationTarget forKey:@"orientation"];
 NSNumber *orientationTarget = [NSNumber numberWithInt:UIInterfaceOrientationPortrait];
 [[UIDevice currentDevice] setValue:orientationTarget forKey:@"orientation"];

强制竖屏

NSNumber *resetOrientationTarget = [NSNumber numberWithInt:UIInterfaceOrientationUnknown]; [[UIDevice currentDevice] setValue:resetOrientationTarget forKey:@"orientation"];
NSNumber *orientationTarget = [NSNumber numberWithInt:UIInterfaceOrientationLandscapeRight];
[[UIDevice currentDevice] setValue:orientationTarget forKey:@"orientation"];

⚠️

在执行上述方法时要重写controller的一下方法

//1，支持旋转
-(BOOL)shouldAutorotate{
   return YES;
}
//2，支持的方向
- (UIInterfaceOrientationMask)supportedInterfaceOrientations {
   //所有方向
   return UIInterfaceOrientationMaskAllButUpsideDown;
}