SwiftUI PageTabView in iOS14.2 will Recall ChildView onAppear method Many times

Question

I use TabView PageTabViewStyle with SwiftUI to display a pageview, when I swipe this TabView I find child view will Recall onAppear method Many times, Can someone tell me why?

Answer 1

For everyone who is still struggling to find a good workaround for this problem. I've managed to use this framework https://github.com/fermoya/SwiftUIPager which can be used to mimic the TabView .tabViewStyle(PageTabViewStyle()) style.

import SwiftUIPager
struct Dummy: View {
    @StateObject var page: Page = .first()
    let numberOfPages : Int = 3
    var body: some View {
        
        Pager(page: self.page,
              data: Array(0..