Mastering SwiftUI’s zIndex: A Comprehensive Guide

This article introduces the zIndex modifier in SwiftUI, including its usage, scope, avoiding animation anomalies with zIndex, why stable values should be set for zIndex, and using zIndex in various layout containers.

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The zIndex modifier

In SwiftUI, developers use the zIndex modifier to control the display order of overlapping views. Views with a larger zIndex value will be displayed above views with a smaller zIndex value. When no zIndex value is specified, SwiftUI will give the view a zIndex value of 0 by default.

ZStack {
    Text("Hello") // default `zIndex` value of 0, displayed at the back…