- 设置背景色
tabBar.barTintColor = UIColor.white
-
UITabBarItem选中和未选中时title颜色
UITabBarItem.appearance().setTitleTextAttributes([NSForegroundColorAttributeName : UIColor.blue], for: .normal)
UITabBarItem.appearance().setTitleTextAttributes([NSForegroundColorAttributeName : UIColor.red], for: .selected)
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