如何让ipad 启动时默认横屏

方法一：

plist文件的Supported interface orientations项中将Portrait top和bottom更改为Landscape left和right。

方法二：

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation{    return (interfaceOrientation == UIInterfaceOrientationLandscapeRight||interfaceOrientation == UIInterfaceOrientationLandscapeLeft);   }