javascript - ReactJs 复选框 - 无法取消选中

Question

我正在尝试使用状态设置复选框的 checked 属性，使用 handleChange 函数更新代码:

getInitialState: function() {
    return {
        selected:0,
        contactId: 0
    };
},

handleChange: function(e) {
    var id = this.state.contactId;

    console.log(e.target.checked);

    if (e.target.checked === true){

        console.log('selected');

        contactChannel.publish({
                    channel: "contact",
                    topic: "selectedContact",
                    data: {
                        id: [id]
                    }});

    } else{

        basketChannel.publish({
            channel: "basket",
            topic: "removePersonFromBasket",
            data: {
                id: [id]
            }
        });


        console.log('deselected flag');


    }
},
render: function() {

    var id = this.state.contactId;
    var isSelected = this.state.selected;

    console.log(isSelected);

    return (
        <div className="contact-selector">
            <input type="checkbox"
                   checked={isSelected}
                onChange={this.handleChange} />
        </div>
    );
}

但是，一旦默认选中该复选框，我就无法取消选中它，谁能告诉我该怎么做？

非常感谢

Answer 1

在 handleChange 函数中，您始终为复选框的状态使用相同的值，但您需要将其反转。

将此添加到您的 handleChange 函数中:

handleChange:function(event){
    this.setState({selected: !this.state.selected}); //look at the !NOT sign

}