Question

我正在尝试实现一种自定义视图，其功能类似于TabView。我正在使用ViewBuilder初始化显示的标签。但是，这意味着当我将多个视图传递给初始化程序时，内容为TupleView。如何一次只显示其中一个视图？

struct TabbedView<Content> : View where Content : View {
    @State var selected:Int = 0
    var content:Content

    var body: some View {
        content
    }

    init(@ViewBuilder _ content:() -> Content) {
        self.content = content()
    }
}

struct TestView: View {
    var body: some View {
        TabbedView {
            Text("A")
            Text("B")
        }
    }
}

Answer 1

好吧，也许它不是很SwiftUIyish，但它可以工作;）

struct TabbedView<Content> : View where Content : View {
    @State var selected:Int = 0
    var content:[Content]

    var body: some View {
        content[selected]
    }

    init(@ViewBuilder _ content:() -> [Content]) {
        self.content = content()
    }
}

struct ContentView: View {
    var body: some View {
        TabbedView { [
            Text("A"),
            Text("B")
            ]
        }
    }
}

SwiftUI，索引ViewBuilder的结果

1 个答案: