xcode 13 iOS 15的坑：解决tabbar变透明了

xcode更新13版本后 旧工程编译完发现tabbar变透明了

如图变成透明背景色了

iOS15 系统tabbar下会出现透明，解决方法如下：

在baseTabbarViewControl viewDidLoad中调整如下：

 if (@available(iOS 15.0, *)) {
        UITabBarAppearance * appearance = [UITabBarAppearance new];
        UIVisualEffectView *effectView = [[UIVisualEffectView alloc] initWithEffect:[UIBlurEffect effectWithStyle:UIBlurEffectStyleLight]];
        appearance.backgroundImage = [UIImage jk_captureWithView:effectView];//把毛玻璃View转成Image
        self.tabBar.scrollEdgeAppearance = appearance;
    }

改完后恢复之前的形状

UITabBar新增新的属性名为scrollEdgeAppearance

/// Describes the appearance attributes for the tabBar to use when an observable scroll view is scrolled to the bottom. If not set, standardAppearance will be used instead.
@property (nonatomic, readwrite, copy, nullable) UITabBarAppearance *scrollEdgeAppearance UI_APPEARANCE_SELECTOR API_AVAILABLE(ios(15.0));

完事