刘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

刘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？
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;
}