Promises is a modern framework that provides synchronization
...To perform more than one async operation, you have to nest the second one inside the completion block of the first one, and also handle an error gracefully. Often such nesting becomes painful to follow or modify. The framework has intuitive APIs that are well documented making it painless to integrate into new or existing code. Supports both Objective-C and Swift. Promises that are created in Objective-C can be used in Swift and vice versa. Has minimum overhead that achieves similar performance to GCD and completion handlers.
iOS UI module library for adding animation to iOS tabbar items
...PlusButton can be deleted dynamically, and the style can be dynamically updated. Let TabBarItemicon is displayed only, and automatically makes the icon vertically centered, support for custom TabBar height. Support multiple TabBar nesting and specify PlusButton position. Support horizontal and vertical screen. It also supports the creation of customized irregularly shaped plus buttons.