Automatic slide switching (SwiftUI) - ios

Question

I can not understand why the timer does not work, and the text does not scroll automatically.
I tried to do so:
ForEach(0..<numberText)
But I got such an error:
Referencing initializer 'init(_:content:)' on 'ForEach' requires that 'some View' conform to 'TableRowContent'
Full code:
let numberText = ["text1","text2","text3","text4"]
struct TextNew: View {
private let timer = Timer.publish(every: 3, on: .main, in: .common).autoconnect()
#State private var index = 0
let textdata = TextData.getAllText()
var body: some View {
GeometryReader { proxy in
TabView(selection: $index) {
ForEach(numberText, id: \.self) { num in
Text("\(num)")
.font(.system(size: 10))
.foregroundColor(.white)
.tag(num)
.padding(.bottom, 50)
}
}
.tabViewStyle(PageTabViewStyle(indexDisplayMode: .never))
.frame(height: 80)
.onReceive(timer, perform: { _ in
withAnimation {
index = index < numberText.count ? index + 1 : 0
}
})
}
}
}
Thanks for any help, I'm new

Answer 1

Try this:
struct TextNew: View {
private let timer = Timer.publish(every: 3, on: .main, in: .common).autoconnect()
#State private var index = 1
#State private var selectedNum: String = ""
var body: some View {
GeometryReader { proxy in
TabView(selection: $selectedNum) {
ForEach(numberText, id: \.self) { num in
Text("\(num)")
.font(.system(size: 10))
.foregroundColor(.white)
.padding(.bottom, 50)
}
}
.tabViewStyle(PageTabViewStyle(indexDisplayMode: .never))
.onReceive(timer, perform: { _ in
withAnimation {
index = index < numberText.count ? index + 1 : 1
selectedNum = numberText[index - 1]
}
})
}
}
}
Explanation:
The reason for this not working is the type mismatch between your .tag and the $index in your TabView declaration. These have to match. By the way you do not need the .tag here as you are setting it to .self in your ForEach loop.