某一页面强制横屏

某一页面强制横屏：

一、首先

在项目里面设置Device Orientation允许转屏的方向，下面设置了竖屏，和横屏（横屏左右根据home键确定）：

 

二、AppDelagate代码

AppDelagate.h文件

@property (nonatomic,assign)BOOL allowRotation;//方向

AppDelagate.m文件

- (UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)nowWindow {

    

    if (_allowRotation == YES) {

        return UIInterfaceOrientationMaskLandscapeLeft;

    }

        return UIInterfaceOrientationMaskPortrait;

    

}

三、然后在需要横屏的页面里：

-(void)viewWillAppear:(BOOL)animated{

    [super viewWillAppear:animated];

    [self allowRotationIsYesOrNo:YES];

}

-(void)viewWillDisappear:(BOOL)animated{

    [super viewWillDisappear:animated];

    [self allowRotationIsYesOrNo:NO];

}

-(void)allowRotationIsYesOrNo:(BOOL)isYesOrNo{

    AppDelegate * appDelegate = (AppDelegate *)[UIApplication sharedApplication].delegate;

    appDelegate.allowRotation = isYesOrNo;

    [self SetTheScreenDirection:isYesOrNo];//调用转屏代码

}

//转屏

- (void)SetTheScreenDirection:(BOOL)fullscreen

{

    if (fullscreen) {

        NSNumber *resetOrientationTarget = [NSNumber numberWithInt:UIInterfaceOrientationUnknown];

        [[UIDevice currentDevice] setValue:resetOrientationTarget forKey:@"orientation"];

        NSNumber *orientationTarget = [NSNumber numberWithInt:UIInterfaceOrientationLandscapeLeft];

        [[UIDevice currentDevice] setValue:orientationTarget forKey:@"orientation"];

    }else{

        NSNumber *resetOrientationTarget = [NSNumber numberWithInt:UIInterfaceOrientationUnknown];

        [[UIDevice currentDevice] setValue:resetOrientationTarget forKey:@"orientation"];

        NSNumber *orientationTarget = [NSNumber numberWithInt:UIInterfaceOrientationPortrait];

        [[UIDevice currentDevice] setValue:orientationTarget forKey:@"orientation"];

    }

}