屏幕旋转

第一步

在

AppDelegate.h

@property (nonatomic, assign) NSInteger allowRotation;

用来区分哪个界面可以横屏

哪个界面不可以

第二步

在

AppDelegate.m

-(UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window
{
if(self.allowRotation==1)
{
return UIInterfaceOrientationMaskAll;
}
else
{
return UIInterfaceOrientationMaskPortrait;
}
}

第三步

在需要横屏的界面调用以下代码即可

AppDelegate * appDelegate = (AppDelegate *)[UIApplication sharedApplication].delegate;
appDelegate.allowRotation = 1;
[[UIDevice currentDevice] setValue:[NSNumber numberWithInteger:UIInterfaceOrientationPortrait] forKey:@"orientation"];
[[UIDevice currentDevice] setValue:[NSNumber numberWithInteger: UIDeviceOrientationLandscapeRight] forKey:@"orientation"];
[[UIDevice currentDevice] setValue:[NSNumber numberWithInteger:UIDeviceOrientationPortraitUpsideDown] forKey:@"orientation"];
[[UIDevice currentDevice] setValue:[NSNumber numberWithInteger:UIDeviceOrientationLandscapeLeft] forKey:@"orientation"];

Demo地址：https://github.com/YouZhiZheShiJingCheng/revolve/tree/master