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浏海屏手机在部分页面通过[[UIApplication sharedApplication] delegate].window.safeAreaInsets.bottom得到底部安全区高度为0问题，如何解决？
出现该问题的页面一般是这样添加的控件：
LCVideoCommentView *commentV = [[self alloc] initWith:commentId goodsId:goodsid home:ishome]; commentV.hidden = YES; // [DYGetCurrentViewController().view addSubview:commentV]; [UIApplication.sharedApplication.keyWindow addSubview:commentV]; [commentV animationShow];
然后在LCVideoCommentView中使用[[UIApplication sharedApplication] delegate].window.safeAreaInsets.bottom获取的高度就是0了。
如我们在播放器SelVideoPlayer中获取到刘海屏手机底部安全区高度为0，我顶部安全区也是0。正如这这样下面的定义：
#define kMainTopHeight ({ float space = 64.0; if (@available(iOS 11.0, *)) space = ([[UIApplication sharedApplication] delegate].window.safeAreaInsets.top+44); (space); }) #define kMainBottomHeight ({ float space = 49.0; if (@available(iOS 11.0, *)) space = ([[UIApplication sharedApplication] delegate].window.safeAreaInsets.bottom + 49); (space); })
分析原因应该是窗口的问题。那如何解决呢？
可以通过重新获取keyWindow来正确找到底部安全高度和顶部安全区高度。
#define Base_BottomHeight ([FMConfig config].safeBottomHeight) // 底部安全区域高度 #define BR_BOTTOM_MARGIN \ ({CGFloat safeBottomHeight = 0;\ if (@available(iOS 11.0, *)) {\ safeBottomHeight = BRGetKeyWindow().safeAreaInsets.bottom;\ }\ (safeBottomHeight);}) /** 获取 keyWindow */ static inline UIWindow *BRGetKeyWindow(void) { UIWindow *keyWindow = nil; #if __IPHONE_OS_VERSION_MAX_ALLOWED >= 130000 // 编译时检查SDK版本：Xcode11+编译会调用（iOS SDK 13.0 以后版本的处理） if (@available(iOS 13.0, *)) { NSSet<UIScene *> *connectedScenes = [UIApplication sharedApplication].connectedScenes; for (UIScene *scene in connectedScenes) { if (scene.activationState == UISceneActivationStateForegroundActive && [scene isKindOfClass:[UIWindowScene class]]) { UIWindowScene *windowScene = (UIWindowScene *)scene; for (UIWindow *window in windowScene.windows) { if (window.isKeyWindow) { keyWindow = window; break; } } } } } else #endif { #if __IPHONE_OS_VERSION_MIN_REQUIRED < 130000 return [UIApplication sharedApplication].keyWindow; #endif } return keyWindow; }
该方法绝大部份情况下可以，但是也有部份场景失效。如我在tabbar首页，隐藏状态栏，采用TXVodPlayer插入表格图层的页面，竟然也是算出的iPhone xr底部tabbar高度是49。
- (CGFloat)statusHeight{ if (_statusHeight == 0) { if (@available(iOS 13.0, *)) { _statusHeight = self.windowScene.statusBarManager.statusBarFrame.size.height; } else { _statusHeight = [UIApplication sharedApplication].statusBarFrame.size.height; } } return _statusHeight; } - (BOOL)isIPhoneX{ return self.statusHeight > 20; } - (CGFloat)safeBottomHeight{ return self.isIPhoneX ? 34 : 0; } - (CGFloat)tabBarHeight{ return self.isIPhoneX ? 83 : 49; }
对于该种场景的解决方法：
#define kMainBottomHeight ({ float space = 49.0; if ([[UIApplication sharedApplication] statusBarFrame].size.height>20) space = 83.0; (space); })
当然这种方法也不是万能的方法，需要结合具体场景来使用。
