咨询iOS可增删项的水平滚动Tab Bar所用UI框架

Hey there! Great observation—horizontal scrollable tab bars with add/remove functionality are really useful for apps that need flexible, scalable navigation. Let’s go through the common approaches to build this, whether using native tools or third-party frameworks:

原生UIKit实现（无需第三方） #

If you prefer sticking to Apple’s native frameworks, you can build this from scratch with UIScrollView and custom tab components:

• 基础容器: Use a UIScrollView set to horizontal scrolling (isScrollEnabled = true, showsHorizontalScrollIndicator = false), and dynamically adjust its contentSize as tabs are added/removed.
• Tab项组件: Create custom UIButton or UIView instances for each tab—handle tap events to update selected state (like changing text color, adding an underline).
• 增删逻辑:
  • To add a tab: Instantiate your custom tab view, add it as a subview to the scroll view, then recalculate the scroll view’s contentSize and re-layout all tabs.
  • To remove a tab: Remove the target subview from the scroll view, then re-adjust the positions of remaining tabs and update contentSize.
• 页面联动: Pair this with a UIPageViewController or a container view to switch content when tabs are tapped.

第三方框架（快速实现） #

If you want to save time and leverage pre-built solutions, these popular frameworks support scrollable, dynamic tab bars:

• XLPagerTabStrip: A widely-used library that offers multiple scrollable tab styles (like segmented, bar, or indicator-based). It integrates seamlessly with page view controllers, and updating tabs (add/remove) is as simple as modifying your data source and calling reloadPagerTabStripView().
• HMSegmentedControl: A flexible segmented control that supports horizontal scrolling. You can easily add/remove segments via its data source methods, and customize every visual aspect (colors, fonts, indicators).
• ScrollableTabBar: A lightweight, focused library specifically for scrollable tab bars. It’s easy to configure and supports dynamic addition/removal of tab items with minimal code.

Key Notes #

Whichever approach you choose, the core principles are:

• Dynamically managing the scroll container’s content size and layout
• Handling tab selection state consistently
• Ensuring smooth scrolling and layout updates when tabs are added or removed

内容的提问来源于stack exchange，提问作者Vincent Ho