［原］Ipad强制横屏

1、只要在Info.plist里面Supported interface orientations (iPad)
设置 UIInterfaceOrientationLandscapeRight 

2、在ViewController中设置：

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation{

    return (toInterfaceOrientation == UIInterfaceOrientationLandscapeRight);

}