React-记connect的几种写法
第一种
最普通,最常见,delllee和官网第写法。
import React, { Component } from 'react';
import {connect} from 'react-redux';
import { Button } from 'antd-mobile';
import { addGunAction , removeGunAction , removeGunAsync}from './store/actionCreators'
class App extends Component {
render() {
console.log();
return (
<div className="App">
<p>{this.props.gun}</p>
<Button type="ghost" size="small" inline onClick={this.props.handeladd}>+</Button>
<Button type="ghost" size="small" inline onClick={this.props.handeljian}>-</Button>
<Button type="ghost" size="small" inline onClick={this.props.handelmanjian}>慢-</Button>
</div>
);
}
}
const mapStateToProps=(state)=>({
gun:state.gun
})
const mapDispachToProps=(dispatch)=>({
handeladd(){
dispatch(addGunAction())
},
handeljian(){
dispatch(removeGunAction())
},
handelmanjian(){
dispatch(removeGunAsync())
}
})
export default connect(mapStateToProps,mapDispachToProps)(App);
第二种
初次接触,感觉有点绕,不太好理解,为什么点击了,直接就派发action了?
import React, { Component } from 'react';
import {connect} from 'react-redux';
import { Button } from 'antd-mobile';
import { addGunAction , removeGunAction , removeGunAsync}from './store/actionCreators'
class App extends Component {
render() {
console.log();
return (
<div className="App">
<p>{this.props.gun}</p>
{/*⚠️不用像第一种那样,点击调用一个方法,方法里再派发action
这种直接点击派发action就可以*/}
<Button type="ghost" size="small" inline onClick={this.props.addGunAction}>+</Button>
<Button type="ghost" size="small" inline onClick={this.props.removeGunAction}>-</Button>
<Button type="ghost" size="small" inline onClick={this.props.removeGunAsync}>慢-</Button>
</div>
);
}
}
const mapStateToProps=(state,ownProps)=>({
gun:state.gun
})
//⚠️这些action已经自动有了dispatch的功能
const actionCreators={ addGunAction , removeGunAction , removeGunAsync}
export default connect(mapStateToProps,actionCreators)(App);
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