无法在iOS 13中设置标签栏阴影图像

Question

在iOS13之前，我使用下面的代码删除了标签栏的顶部边框：

UITabBar.appearance().shadowImage = UIImage()
UITabBar.appearance().backgroundImage = UIImage()

但这不适用于iOS13，我正在寻找解决方案。你有什么想法吗？

Answer 1

迅捷4+：

在您的TabBarController类中编写以下代码：

 if #available(iOS 13, *) {
        let appearance = self.tabBar.standardAppearance.copy()
        appearance.backgroundImage = UIImage()
        appearance.shadowImage = UIImage()
        appearance.shadowColor = .clear
        self.tabBar.standardAppearance = appearance
    } else {
        self.tabBar.shadowImage = UIImage()
        self.tabBar.backgroundImage = UIImage()
    }

对于标题调整，请使用以下命令：

appearance.stackedLayoutAppearance.normal.titlePositionAdjustment = UIOffset(horizontal: 0, vertical: -12)

对于目标C

  if (@available(iOS 13.0, *)) {
    UITabBarAppearance* appearance =  self.tabBar.standardAppearance.copy;
    appearance.backgroundImage = [UIImage new];
    appearance.shadowImage = [UIImage new];
    appearance.shadowColor = [UIColor clearColor];
    // Title adjustment
    appearance.stackedLayoutAppearance.normal.titlePositionAdjustment = UIOffsetMake(0, -12);
    self.tabBar.standardAppearance = appearance;
} else {
    self.tabBar.shadowImage = [UIImage new];
    self.tabBar.backgroundImage = [UIImage new];
}