iOS 11 實現App在禁止轉屏的狀態下網頁播放器全屏

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禁止轉屏是這個意思，在General中設定Device Orientation只有豎屏。

要點就是重寫UIViewController的以下3個屬性方法

系統的全屏視頻播放器是AVFullScreenViewController，但並未暴露出任何的API，所以要在UIViewController的擴充中去修改

以下是UIViewController擴充中的實現方法，判斷只有視頻播放器才轉屏

- (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;}

 

還沒有結束，需要在AppDelegate中重寫

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

這個系統方法。其實只需要支援豎屏和播放器橫屏兩種狀態就夠了，但是那樣需要加判斷，在轉屏的時候返回不同值。所以這裡直接用UIInterfaceOrientationMaskAll更為簡潔。

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

接下來就要在需要開啟全屏播放的控制器中實現邏輯了。

添加BOOL變數判斷是否載入完

@property (nonatomic,assign)BOOL didWebViewLoadOK;

初始化時加入下面兩個通知

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

別忘記移除

- (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;}

實現通知

#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];    }}

這樣就完成了

 

iOS 11 實現App在禁止轉屏的狀態下網頁播放器全屏