标签： ios orientation landscape portrait
纵向（视图控制器A）强制横向（查看控制器B）。 有时候View Controller B在Landscape中没有完全旋转，半黑色被切断。 请查看以下链接。
In this, it is coming correctly in landscape mode to ViewController B
In this, It tries to change to landscape but not happened fully and stuck in middle
