How do I customize animation timing with AirBar?

AirBar provides transition progress values in the State object; you control timing by implementing UIView.animate or similar methods in the state observer closure to respond to these values.

Can AirBar work with a UICollectionView or UITableView?

Yes, since both inherit from UIScrollView, you can bind AirBar's BarController to them using the set(scrollView:) method, as shown in the README for multiple scroll views.

What's the difference between AirBar and using a native UINavigationBar with large titles?

AirBar offers more flexibility for custom expandable menus beyond Apple's predefined styles, allowing arbitrary UI elements and transitions, whereas UINavigationBar is limited to standard behaviors.

How to handle multiple expandable menus in one iOS app?

Create separate BarController instances for each menu, bind them to different UIScrollView objects, and use the preconfigure method to set up scrolling views before activation.

Is AirBar compatible with Swift Package Manager?

Yes, the README includes installation via Swift Package Manager by adding the package dependency, making it easy to integrate in modern Xcode projects.

What are the performance impacts of using AirBar?

It adds minimal overhead by observing scroll events, but performance depends on your UI transformations in the state observer; complex animations might affect scroll smoothness if not optimized.

Open-Awesome

AirBar

MITSwift

An iOS library for creating UIScrollView-driven expandable menus with smooth state transitions.

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639 stars51 forks0 contributors

What is AirBar?

AirBar is an iOS library that creates expandable menus driven by UIScrollView scrolling. It solves the problem of building interactive, scroll-responsive navigation bars or toolbars by providing state transitions and UI transformation tools based on scroll position.

Target Audience

iOS developers building apps with dynamic navigation interfaces, such as those needing collapsible headers, expandable toolbars, or scroll-aware UI components.

Value Proposition

Developers choose AirBar for its seamless integration with UIScrollView, eliminating manual scroll handling, and its flexible state management that simplifies creating polished expandable menus with smooth animations.

Overview

iOS library - UIScrollView driven expandable menu.

Use Cases

Best For

Creating collapsible navigation bars that expand on scroll
Building expandable toolbars in scrollable content interfaces
Implementing scroll-driven UI transformations in iOS apps
Developing dynamic headers that respond to user scrolling
Adding interactive menus that transition between compact and expanded states
Enhancing user experience with smooth, scroll-aware animations

Not Ideal For

Apps built with SwiftUI instead of UIKit, as it relies on UIScrollView from UIKit
Projects needing drop-in, pre-styled components without custom UI implementation work
Complex animations requiring more than three discrete states (compact, normal, expanded)
Teams prioritizing extensive documentation and community support for quick setup

Pros & Cons

Pros

Seamless Scroll Integration

Directly binds to UIScrollView to trigger menu expansions automatically, eliminating manual scroll delegate boilerplate.

Flexible State Management

Provides a State object with height and transition progress values, enabling precise UI transformations for smooth animations.

Multi-ScrollView Support

Supports preconfiguring multiple UIScrollView objects via the preconfigure method, useful for complex layouts with multiple scrollable areas.

Easy Installation

Offers support for Carthage, CocoaPods, and Swift Package Manager, simplifying integration into various iOS project setups.

Cons

No Built-in UI Components

Only provides state management; developers must implement all UI elements and animations from scratch, increasing initial development time.

Incomplete Feature Set

The TODO list admits missing expansion resistance, which limits advanced interactive behaviors like bounce or concatenation effects.

UIKit-Only Limitation

Designed exclusively for UIKit, making it incompatible with SwiftUI projects without additional bridging or adaptation efforts.

Frequently Asked Questions

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