iOS 关于横竖屏幕的问题

在 info.plist文件中添加 Supported interface orientations数组元素如下

1.Portrait (bottom home button)

2.Portrait (top home button)

3.Landscape (left home button)

4.Landscape (right home button)

强制横屏和竖屏:http://www.jianshu.com/p/5c773628caa6