SwiftUI预览结构“调用中缺少参数'text'的参数”

Question

我已经在SwiftUI视图中包装了一个自定义UIView，并且Preview结构给我带来了问题：

struct ContentView: UIViewRepresentable {
    @Binding var text: String
    ....
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some UIViewRepresentable {
        ContentView() // This is the offending line. It wants to change it to:
                      // ContentView(text: <#Binding<String>#>)
    }
}

我该怎么做才能使其正常工作？为什么要询问文本参数？

谢谢！