使用这个框架后代码强制横屏失败

[Jijingcheng]

AppDelegate *appDelegate = (AppDelegate *)[UIApplication sharedApplication].delegate;
// 打开横屏开关
appDelegate.allowRotation = YES;
// 调用转屏代码
[UIDevice deviceMandatoryLandscapeWithNewOrientation:UIInterfaceOrientationLandscapeRight];

/// 输入要强制转屏的方向
/// @param interfaceOrientation 转屏的方向

• (void)deviceMandatoryLandscapeWithNewOrientation:(UIInterfaceOrientation)interfaceOrientation {

  NSNumber *resetOrientationTarget = [NSNumber numberWithInt:UIInterfaceOrientationUnknown];

  [[UIDevice currentDevice] setValue:resetOrientationTarget forKey:@"orientation"];

  // 将输入的转屏方向（枚举）转换成Int类型
  int orientation = (int)interfaceOrientation;

  // 对象包装
  NSNumber *orientationTarget = [NSNumber numberWithInt:orientation];

  // 实现横竖屏旋转
  [[UIDevice currentDevice] setValue:orientationTarget forKey:@"orientation"];
  }

[yiplee]

这个库没有涉及到屏幕的方向