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iOS Swiftmobile~10 mins

List view basics in iOS Swift - UI Render Trace

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Component - List view basics

This UI component shows a simple list of items vertically. Each item is a row that the user can scroll through. It helps display many pieces of information in a clean, organized way.

Widget Tree
NavigationView
└── List
    ├── Text ("Apple")
    ├── Text ("Banana")
    ├── Text ("Cherry")
    └── Text ("Date")
The NavigationView is the main container that provides a navigation bar. Inside it, the List displays multiple Text rows stacked vertically. Each Text widget shows one fruit name as a list item.
Render Trace - 6 Steps
Step 1: NavigationView
Step 2: List
Step 3: Text ("Apple")
Step 4: Text ("Banana")
Step 5: Text ("Cherry")
Step 6: Text ("Date")
State Change - Re-render
Trigger:User scrolls the list
Before
List shows top four items: Apple, Banana, Cherry, Date
After
List scrolls vertically to reveal more items if available
Re-renders:List component updates visible rows as user scrolls
UI Quiz - 3 Questions
Test your understanding
What widget contains the list of items?
AList
BText
CNavigationView
DButton
Key Insight
Using a List inside a NavigationView is a common pattern on iOS to show scrollable rows with a navigation bar. Each row is a simple Text widget here, but can be customized with images or buttons. The List handles scrolling and efficient row reuse automatically.