Question

C＃开发人员在这里。我想问一下如何为一个类添加值。

这是我的课程：

class Players {
    constructor(playerOne, playerTwo) {
    this.playerOne = playerOne;
    this.playerTwo = playerTwo;
    }
}

在这里我称它为构造函数：

handleClick() {
this.setState({ clicked: true });
Players(
  document.getElementById("Select_Player1").value,
  document.getElementById("Select_Player2").value
);
console.log(Players.playerOne);
console.log(Players.playerTwo);
}

然后将其导出到文件末尾：

export { Players };

单击执行handleClick()应用程序的按钮后，返回错误：TypeError: Cannot call a class as a function。

Answer 1

this.playerOne和this.playerTwo不是静态的！

因此可用于非静态：

class Players {
    constructor(playerOne, playerTwo) {
        this.playerOne = playerOne;
        this.playerTwo = playerTwo;
    }
}
var myP = new Players(
  'test1',
  'test2'
);
console.log(myP.playerOne);
console.log(myP.playerTwo);

<script src="https://cdnjs.cloudflare.com/ajax/libs/react/0.14.8/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/0.14.8/react-dom.min.js"></script>

并使用静态：

class Players {
    static setPlayers(playerOne, playerTwo) {
        this.playerOne = playerOne;
        this.playerTwo = playerTwo;
    }
}
Players.setPlayers(
  'test1',
  'test2'
);
console.log(Players.playerOne);
console.log(Players.playerTwo);

<script src="https://cdnjs.cloudflare.com/ajax/libs/react/0.14.8/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/0.14.8/react-dom.min.js"></script>

向类添加值

1 个答案: