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  • iOS 11 实现App在禁止转屏的状态下网页播放器全屏

    禁止转屏是这个意思,在General中设置Device Orientation只有竖屏。

    要点就是重写UIViewController的以下3个属性方法

    系统的全屏视频播放器是AVFullScreenViewController,但并未暴露出任何的API,所以要在UIViewController的扩展中去修改

    以下是UIViewController扩展中的实现方法,判断只有视频播放器才转屏

    - (BOOL)shouldAutorotate {
        if ([self isKindOfClass:NSClassFromString(@"AVFullScreenViewController")]) {
            return YES;
        }
        
        return NO;
    }
    
    - (UIInterfaceOrientationMask)supportedInterfaceOrientations {
        if ([self isKindOfClass:NSClassFromString(@"AVFullScreenViewController")]) {
            return UIInterfaceOrientationMaskLandscapeRight;
        }
    
        return UIInterfaceOrientationMaskPortrait;
    }
    
    - (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation {
        if ([self isKindOfClass:NSClassFromString(@"AVFullScreenViewController")]) {
            return UIInterfaceOrientationLandscapeRight;
        }
    
        return UIInterfaceOrientationPortrait;
    }

    还没有结束,需要在AppDelegate中重写

    - (UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(nullable UIWindow *)window  NS_AVAILABLE_IOS(6_0) __TVOS_PROHIBITED;

    这个系统方法。其实只需要支持竖屏和播放器横屏两种状态就够了,但是那样需要加判断,在转屏的时候返回不同值。所以这里直接用UIInterfaceOrientationMaskAll更为简洁。

    - (UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window {
        return UIInterfaceOrientationMaskAll;
    }

    接下来就要在需要打开全屏播放的控制器中实现逻辑了。

    添加BOOL变量判断是否加载完

    @property (nonatomic,assign)BOOL didWebViewLoadOK;

    初始化时加入下面两个通知

          [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(begainFullScreen) name:UIWindowDidBecomeVisibleNotification object:nil];//进入全屏
          [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(endFullScreen) name:UIWindowDidBecomeHiddenNotification object:nil];//退出全屏

    别忘记移除

    - (void)dealloc {
        [[NSNotificationCenter defaultCenter] removeObserver:self name:UIWindowDidBecomeVisibleNotification object:nil];
        [[NSNotificationCenter defaultCenter] removeObserver:self name:UIWindowDidBecomeHiddenNotification object:nil];
    }

    WebView的代理

    - (void)webViewDidFinishLoad:(UIWebView *)webView {
        self.didWebViewLoadOK = YES;
    }
    
    - (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error {
        self.didWebViewLoadOK = NO;
    }

    实现通知

    #pragma mark - Notification
    -(void)begainFullScreen
    {
        if(!self.didWebViewLoadOK) {
            return;
        }
        
        [[UIDevice currentDevice] setValue:@"UIInterfaceOrientationLandscapeLeft" forKey:@"orientation"];
    
        if ([[UIDevice currentDevice] respondsToSelector:@selector(setOrientation:)]) {
            SEL selector = NSSelectorFromString(@"setOrientation:");
            NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:[UIDevice instanceMethodSignatureForSelector:selector]];
            [invocation setSelector:selector];
            [invocation setTarget:[UIDevice currentDevice]];
            int val = UIInterfaceOrientationLandscapeLeft;
            [invocation setArgument:&val atIndex:2];
            [invocation invoke];
        }
    
    }
    
    - (void)endFullScreen
    {
        if ([[UIDevice currentDevice] respondsToSelector:@selector(setOrientation:)]) {
            SEL selector = NSSelectorFromString(@"setOrientation:");
            NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:[UIDevice instanceMethodSignatureForSelector:selector]];
            [invocation setSelector:selector];
            [invocation setTarget:[UIDevice currentDevice]];
            int val =UIInterfaceOrientationPortrait;
            [invocation setArgument:&val atIndex:2];
            [invocation invoke];
        }
    }

    这样就完成了

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  • 原文地址:https://www.cnblogs.com/xiaobaizhu/p/8081717.html
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