ios开发之 -- 强制横屏

在写项目的时候，会遇到很多稀奇古怪的需求，我就碰到一个写一个网站，需要强制横屏，然后不需要上架，网上看了很多大神的需求，基本都能实现，但是不太好用，

自己参考搞了一个，代码如下：

AppDelegate.h

@property(nonatomic,assign)BOOL allowRotation;//是否允许转向

.m

#pragma mark 支持窗口翻转
- (UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(nullable UIWindow *)window

{
    
    if (_allowRotation == YES) {
        
        return UIInterfaceOrientationMaskLandscapeRight;
        
    }else{
        
        return (UIInterfaceOrientationMaskPortrait);
        
    }
    
}

横屏展示的viewcontroler：

.m

- (void)setNewOrientation:(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"];
        
    }
    
}

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    AppDelegate * appDelegate = (AppDelegate *)[UIApplication sharedApplication].delegate;
    
    appDelegate.allowRotation = YES;//(以上2行代码,可以理解为打开横屏开关)
    
    [self setNewOrientation:YES];//调用转屏代码
    
    [self creatWebView];
    
}

-(void)creatWebView
{
    UIWebView *webV = [[UIWebView alloc]initWithFrame:self.view.frame];
    [webV loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"https://www.badiu.com"]]];
    [self.view addSubview:webV];
}

这样的话，进入的vc直接就是横屏展示了，我是在这定死了，只能向右横屏展示，这个可以自己设置的，根据重力展示，如图：

 在上架箭头的地方设置即可！