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並前往https://www.hackingwithswift.com/quick-start/swiftui/how-to-respond-to-view-lifecycle-events-onappear-and-ondisappear

How to respond to view lifecycle events: onAppear() and ...

SwiftUI gives us equivalents to UIKit's viewDidAppear() and viewDidDisappear() in the form of onAppear() and onDisappear() .

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