组件props.dispatch不起作用。 React REDX
问题描述:
我需要帮助。在我的colorcontrol中,我试图做一个没有运气的this.props.dispatch(triggerFBEvent(fbID, method, params))
。 但是,如果我只是做triggerFBEvent(fbID, method, params)
,那么有效。我得到的错误: index.bundle.js:61968 Uncaught TypeError: this.props.dispatch is not a function
组件props.dispatch不起作用。 React REDX
我试图做到的是要能够在新道具与线发送上面,然后在
componentWillMount() { this.props.dispatch(fetchFBEvent(this.props.fbID, "getColor")) }
调用自定义的服务,以更新用适当的颜色表示。但是this.props.dispatch也不是那里的函数。
import React from 'react'
import { connect } from 'react-redux'
import {triggerFBEvent, triggerFBClearEvent, fetchFBEvent} from '../actions/functionblocksActions'
`
import { CustomPicker, HuePicker, SaturationPicker, SliderPicker, CustomPointer } from 'react-color';
@connect((store) => {
return {
fb: store.functionblocks.functionblock
}
})
export default class Functionblock extends React.Component {
constructor(props) {
super(props);
this.state = {
};
this._getType = this._getType.bind(this)
}
_getType (wanted) {
const { fbID, fbName, func } = this.props;
let type;
let types = {
'com.xxxx.xx.service.dal.functions.Alarm': function() {
type = <Alarm fbID={fbID} fbName={fbName}/>;
},
'com.xxxx.xxx.service.dal.functions.BooleanControl': function() {
type = <BooleanControl fbID={fbID} fbName={fbName}/>;
},
'com.xxx.xxxx.service.dal.functions.BooleanSensor': function() {
type = <BooleanSensor fbID={fbID} fbName={fbName} />;
},
'com.xxxx.xxx.service.dal.functions.ColorControl': function() {
type = <ColorControl func={func} fbID={fbID} fbName={fbName} />;
}
'default': function() {
type = <WakeUp fbID={fbID} fbName={fbName} />;
}
};
// invoke it
(types[wanted] || types['default'])();
// return a String with chosen type
return type;
}
render() {
const { fbID, fbName, func } = this.props;
const type = this._getType(func.serviceProperties["clazz"]);
return(
<div>
{type}
</div>
)
}
}
// Classes for the different functions.
class ColorControl extends React.Component {
componentWillMount() {
this.props.dispatch(fetchFBEvent(this.props.fbID, "getColor"))
}
constructor(props) {
super(props);
this.state = {
color: {
h: 150.3197479248047,
s: 0.5,
l: 0.5
}
}
this.onChangeComplete = this.onChangeComplete.bind(this);
}
componentWillReceiveProps(nextProps) {
alert("YEP")
// let home = this._getHome(nextProps.areas, nextProps.statics);
// if(home!=null){
// this.setState({
// inputHome: home.name,
// })
// }
}
onChangeComplete(color, event) {
let hsl = color.hsl;
let hue = color.hsl.h/360;
let saturation = color.hsl.s;
let lightness = color.hsl.l;
this.setState({ color: hsl })
// Update props
let fbID = this.props.fbID;
let method = "setColor";
let params = {"hue": hue, "sat": saturation, "light": lightness};
this.props.dispatch(triggerFBEvent(fbID, method, params))
}
_defineFunction(){
}
render() {
return (<div>
<SliderPicker {...this.props}
pointer={ CustomPointer }
color={this.state.color}
onChangeComplete={ this.onChangeComplete }
direction={ 'horizontal' || 'vertical' }/>
</div>
)
}
}
任何人都可以帮助我了解什么是错误的?
答
您需要将ColorControl
连接到Redux,否则它不会获得调度支持。
@connect()
class ColorControl extends React.Component {
答
这里是用自己的行动,没有问题的代码库。
import * as actions from './YourActionsPath'
import { bindActionCreators } from 'redux'
@connect(
state => ({
yourDerivedState : state.somePath
}),
dispatch => ({
actions : bindActionCreators(actions, dispatch)
})
)
export default class YourClass extends Component {
someMethod(){
this.props.actions.yourAction() // call it with no problems
}
render(){
return (
// your html
)
}
}
我希望你明白了。如果你使用这种模式,你不会有问题。
正如你可以使用你的派生状态this.props.derivedState,您在连接定义,你也可以用你的连接定义你的行动。
此外,如果您连接了组件,则可以使用this.props.dispatch。如果您需要使用它,但这会使代码不清晰并导致维护问题。
答
import { createStore } from 'redux'
let store = createStore(//define reducer,preload state and enhancer)
//call action
store.dispatch(triggerFBEvent(fbID, method, params))
ColorControl是否连接到redux? – Scimonster
它似乎并不像你正在使用''为ColorControl' connect'。如果您使用的是修饰语法,那么你需要添加'@ connect'只是'ColorControl'组件定义以上为好。当然,除非它是一个连通组件的孩子。 –