Custom UITabBarController class which draw line indicator with custom color above or below the selected tab bar item using 'selectionIndicatorImage' property on the UITabBar class
Check out this lovingly crafted Apple Music-style popup library. SPAlert is written in clean, beautiful, modern Swift code by Ivan Vorobei, a prolific and talented open source developer.
This open source project contains a ton of preset styles, including "done," "heart," "message," and more. If the presets don't fit your needs, you can customize the popups with custom images and duration. Includes support for light and dark modes, and installable via Swift Package Manager and CocoaPods.