66 lines
1.5 KiB
Markdown
66 lines
1.5 KiB
Markdown
---
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title: Set State with this.setState
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localeTitle: 使用this.setState设置State
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---
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## 使用this.setState设置State
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#### 提示1：
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```JSX
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class MyComponent extends React.Component {
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constructor(props) {
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super(props);
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this.state = {
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name: 'Initial State'
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};
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this.handleClick = this.handleClick.bind(this);
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}
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handleClick() {
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// change code below this line
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// Update the state data by using "this.setState()" method.
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// You can look to the sample inside the description for calling "setState()" method.
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// change code above this line
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}
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render() {
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return (
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<div>
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<button onClick={this.handleClick}>Click Me</button>
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<h1>{this.state.name}</h1>
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</div>
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);
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}
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};
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```
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## 解
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```JSX
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class MyComponent extends React.Component {
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constructor(props) {
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super(props);
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this.state = {
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name: 'Initial State'
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};
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this.handleClick = this.handleClick.bind(this);
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}
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handleClick() {
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// change code below this line
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this.setState({
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name: 'React Rocks!'
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});
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// change code above this line
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}
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render() {
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return (
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<div>
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<button onClick={this.handleClick}>Click Me</button>
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<h1>{this.state.name}</h1>
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</div>
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);
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}
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};
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```
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### 代码说明：
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当用户单击按钮时，将调用“handleClick（）”方法 在此方法中，构造函数状态的数据将通过“setState（）”方法更新。 然后将使用构造函数状态的新数据更改h1标记。 |