xcode5 设置横屏 兼容ios5

重载shouldAutorotateToInterfaceOrientation:方法，这种方式是可行的。具体如下： 
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation 
{ 
    // Return YES for supported orientations 
return ((interfaceOrientation ==UIDeviceOrientationLandscapeLeft)||(interfaceOrientation ==UIDeviceOrientationLandscapeRight)); 

} 

如果有全局设置的方法，谢谢留言