Scrollto with Scrollview doesn’t work the first time - swiftui

Question

I have the problem that in the example the scrollto function doesn’t work the first time the list expands over the bottom edge. After scrolling to the bottom it is working again.
Perhaps these examples helps to find the underlying problem, which I can’t figure out:
when removing the most inner VStack it is working the first time
When putting a text for example over the adding button and giving a high enough height of frame it is also working the first time
struct ContentView: View{
#State var sp = [1,2,3,4,5]
var body: some View{
VStack{
Text("asdf")
.frame(height: 90)
ScrollView{
ScrollViewReader{scrollReader in
VStack{
VStack{
ForEach(sp,id:\.self){p in
Text("\(p)").frame(height: 50)
}
}
Button("add"){
sp.append((sp.last ?? 0) + 1)
}
Spacer(minLength: 60)
.id("bottom")
}
.frame(maxWidth: .infinity)
.border(Color.green)
.onChange(of: sp.count){_ in
scrollReader.scrollTo("bottom")
}
}
}
.border(Color.black)
}
}
}

Answer 1

Remove your VStacks as they are unnecessary and are interfering with the operation of the Scrollview. Essentially, everything you are getting out of the ForEach is a "cell". With the VStack's, you are putting EVERYTHING into 1 cell, and then expecting things to work. ScrollView is looking for the multiple cells, so give them to it.
struct ContentView: View {
#State var sp = [1,2,3,4,5]
var body: some View{
VStack{
Text("asdf")
.frame(height: 90)
ScrollView{
ScrollViewReader{scrollReader in
ForEach(sp,id:\.self){p in
Text("\(p)").frame(height: 50)
}
Button("add"){
sp.append((sp.last ?? 0) + 1)
}
Spacer(minLength: 60)
.id("bottom")
.frame(maxWidth: .infinity)
.border(Color.green)
.onChange(of: sp.count){_ in
scrollReader.scrollTo("bottom")
}
}
}
.border(Color.black)
}
}
}

Answer 2

Since It does not work on the first time/click. So set a timer to execute your code again after a few milliseconds. I have set 100 milliseconds so that the ScrollView scrolls instantly.
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
public void run() {
mainScrollView.scrollTo(0,mainScrollView.getHeight());// Your code here
}
}, 100);// Delay time in milliseconds