flutter - Flutter ElevatedButton onPressed 功能变化

Question

我有一个定义的 ElevatedButton，如何将 onPressed 侦听器分配给另一个函数？像这样的东西 -

button1.onPressed() => log("something else");

 Widget button1 = ElevatedButton(
    onPressed: () => log("something"),
    child: Text("name"),
  );

谢谢你！

Answer 1

你可以做这样的事情

Widget getElevatedButton(Function funct) {
    return ElevatedButton(
      onPressed: () => funct(),
      child: Text("name"),
    );
  }

然后您将能够将您想要的任何功能传递给您的 ElevatedButton

var button1 = getElevatedButton(() => log("something"));
var button2 = getElevatedButton(() => log("something else"));

Answer 2

使用其他功能或在功能使用中重新创建按钮，if-else具体取决于变量。

Answer 3

你也去争取

getElevatedButton(funct: (){log("something else");});

Widget getElevatedButton({Function funct}) {
    return ElevatedButton(
      onPressed: funct,
      child: Text("name"),
    );
  }