swiftui - ScrollView 与 Geometry Reader 结合使用时无法正确滚动（反弹）

Question

我已经在这里查看了答案（ScrollView Don't Scroll with Geometry Reader as Child），我猜这很相似，但我无法弄清楚。

我的目标是显示相同大小（二次）的图像。

这是我的观点：

struct MyGeoView: View {
    
    let icons = ["bed.double.fill","tram.fill","tv.music.note.fill","hare.fill", "person", "clock", "plus", "trash", "home", "arrow", "pencil", "scribble", "folder", "folder.circle", "trash.circle", "paperplane"]
    
    var body: some View {
        
        GeometryReader{ geo in
            ScrollView{
                GeometryReader{ geo in
                    LazyVGrid(columns: Array(repeating: GridItem(.flexible()), count: 3), spacing: 3 ){
                        ForEach(icons, id: \.self){ post in
                            Image(systemName: post)
                                .frame(width: geo.size.width/3, height: geo.size.width/3)
                                .background(Color.pink)
                                .foregroundColor(.white)
                        }
                    }
                }
            }
        }
    }
    
}

不幸的是，它没有正确滚动（反弹）并且总是回到顶部。你有什么想法吗？

谢谢！

Answer 1

你只需要一个GeometryReader，外部的。

这是更正的代码。使用 Xcode 12.1 / iOS 14.1 测试

var body: some View {
    GeometryReader{ geo in
        ScrollView{
            LazyVGrid(columns: Array(repeating: GridItem(.flexible()), count: 3), spacing: 3 ){
                ForEach(icons, id: \.self){ post in
                    Image(systemName: post)
                        .frame(width: geo.size.width/3, height: geo.size.width/3)
                        .background(Color.pink)
                        .foregroundColor(.white)
                }
            }
        }
    }
}