需求：

让push的ViewController界面强制横屏

一、配置

image.png

二、添加强制横屏方法

pragma mark -- 强制转换横屏

• (void)orientationToPortrait:(UIInterfaceOrientation)orientation {

  SEL selector = NSSelectorFromString(@"setOrientation:");

  NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:[UIDevice instanceMethodSignatureForSelector:selector]];

  [invocation setSelector:selector];

  [invocation setTarget:[UIDevice currentDevice]];

  int val = orientation;

  [invocation setArgument:&val atIndex:2];//前两个参数已被target和selector占用

  [invocation invoke];

}

三、在需要跳转的方法中调用上述方法，令其转换屏幕

[self orientationToPortrait:UIInterfaceOrientationLandscapeLeft];

• 1

四、返回竖屏的方法中调用

[self orientationToPortrait:UIInterfaceOrientationPortrait];