SwiftUI BasicsLesson 49Free preview

SwiftUI Modifiers & ViewBuilder

This lesson is part of Swift · All levels

Summary

This lesson will show you how View Modifiers and the @ViewBuilder attributes work in SwiftUI. View modifier wrapped the display component to change its style or behavior and restore a new view. @ViewBuilder is an advanced result builder that allows you to create multiple declarative child views in one closure.

Key points

The modifier works with the chain principle (chaining) and wrapped the previous view
The writing order of the modifier greatly affects the final layout appearance
Custom modifier is created by adopting the 'ViewModifier' protocol
@ViewBuilder compiles many of the child's views into one TupleView unit without syntax manual

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