ios - 无法在 iOS 13 中设置标签栏阴影图像

Question

在iOS13之前，我使用下面的代码去除标签栏的上边框:

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

但它不适用于 iOS13，我正在寻找解决方案。你有什么想法吗？

Answer 1

swift 4+:

在你的 TabBarController 类中这样写:

 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()
    }

对于标题调整使用这个:

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

针对 objective-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];
}