在Reactjs中使选中/未选中属性onChange复选框

Make checked/unchecked attribute onChange checkbox in Reactjs

本文关键字：属性 onChange 复选框 Reactjs      更新时间：2023-09-26

我的react组件有一个问题。我有像这样的自定义样式的复选框http://jsfiddle.net/fvdbcch0/

我想点击我的组件或标签来检查或取消检查输入。

目前它只工作在基本的样式只有当我点击输入。

如何正确更改onChange检查状态

代码:

 var Tag = React.createClass({
getInitialState: function(){
  return {
      checked: false
  };
},
componentDidMount: function() {
    this.setState({
        checked: false
      });
},
_onChange: function(event) {
   if(this.state.checked == false){
       this.setState({
        checked: true
      });
   } else {
       this.setState({
        checked: false
      });
   }
},
    render: function() {
        return (
            <div>
                <input type="checkbox" id="{this.props.id}" name="{this.props.name}" checked={this.state.checked} onChange={ this._onChange }
  value={ this.props.id }/><label htmlFor="{this.props.name}">{this.props.name}</label>
            </div>
        );
    }
});
var ReviewTag = React.createClass({
    render: function() {
         var tags = [{"id": 1, "name": "friendly"}, {"id": 2, "name": "comfortable"}, {"id": 3, "name": "fast"}];
         const tagComps = tags.map(function(tag){
           return <Tag {...tag} />;
         });
        return (
        <div>
             {tagComps}
        </div>
    );
    }
});
React.render(<ReviewTag/>, document.body);

和样式的自定义输入:

/* Base for label styling */
[type="checkbox"]:not(:checked),
[type="checkbox"]:checked,
[type="radio"]:not(:checked),
[type="radio"]:checked{
  position: absolute;
  left: -9999px;
}
[type="checkbox"]:not(:checked) + label,
[type="checkbox"]:checked + label,
[type="radio"]:not(:checked) + label,
[type="radio"]:checked + label{
  position: relative;
  padding-left: 25px;
  cursor: pointer;
}
/* checkbox/radio aspect */
[type="checkbox"]:not(:checked) + label:before,
[type="checkbox"]:checked + label:before,
[type="radio"]:not(:checked) + label:before,
[type="radio"]:checked + label:before{
  content: '';
  position: absolute;
  left:0; top: 50%;
  width: 1rem; height:1rem;
  border: 1px solid #aaa;
  background: #fff;
  box-shadow: inset 0 1px 3px rgba(0,0,0,.3);
  transform: translateY(-50%);
}
[type="radio"]:not(:checked) + label:before,
[type="radio"]:checked + label:before{
  border-radius:100%;
}
/* checked mark aspect */
[type="checkbox"]:checked + label:after {
  content: '✓';
  position: absolute;
  top: 50%;
  left: 0px;
  font-size: 1rem;
  line-height: 0.8;
  color: #e71558;
  transition: all .2s;
  transform: translateY(-50%);
}
/* checked radio aspect */
[type="radio"]:checked + label:after {
  content: '•';
  position: absolute;
  top: 6px;
  left: 2px;
  font-size: 15px;
  line-height: 0.8;
  color: #e71558;
  transition: all .2s;
  //transform: translateY(-50%);
  text-align: center;
}
/* checked mark aspect changes */
[type="checkbox"]:not(:checked) + label:after,
[type="radio"]:not(:checked) + label:after{
  opacity: 0;
  transform: scale(0);
}
[type="checkbox"]:checked + label:after,
[type="radio"]:checked + label:after {
  opacity: 1;
  //transform: scale(1);
}
/* disabled checkbox/radio */
[type="checkbox"]:disabled:not(:checked) + label:before,
[type="checkbox"]:disabled:checked + label:before,
[type="radio"]:disabled:not(:checked) + label:before,
[type="radio"]:disabled:checked + label:before{
  box-shadow: none;
  border-color: #bbb;
  background-color: #ddd;
}
[type="checkbox"]:disabled:checked + label:after,
[type="radio"]:disabled:checked + label:after{
  color: #999;
}
[type="checkbox"]:disabled + label,
[type="radio"]:disabled + label{
  color: #aaa;
}
/* accessibility */
[type="checkbox"]:checked:focus + label:before,
[type="checkbox"]:not(:checked):focus + label:before,
[type="radio"]:checked:focus + label:before,
[type="radio"]:not(:checked):focus + label:before{
  border: 1px dotted blue;
}
/* hover style just for information */
label:hover:before {
  border: 1px solid #4778d9!important;
}

非常感谢你的帮助

您的复选框缺少一些为使其工作所需的道具。你需要能够使用props或state告诉复选框是否被选中。你还需要给每个复选框一个值，这样当你选中它时，你就会有一个值来工作。最后，你需要一个onChange道具，它将在复选框被点击时发生。这个函数应该更新控制特定复选框是否被选中的状态。下面是一个为react

创建的复选框输入示例
<input name={ this.props.name }
      type="checkbox"
      checked={ this.props.checked }
      className="cui-checkbox-input"
      onChange={ this._onChange }
      value={ this.props.value } />

_onChange是一个类似于

的函数
_onChange: function(event) { 
   // do stuff using the event to grab needed values
}

好了，我找到解决办法了。

我在组件中添加了onClick={ this._onChange }到我的标签，并且它有效!

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