我正在尝试理解和使用HOC with react和redux。我有以下设置。我将有多个按钮使用the hoc并传入他们自己的onClick。并想知道:
一个。这是HOC模式的一个很好的用法吗?
湾在FooterButton的render函数中使用此设置,this
引用DesignatedWorkerGlobalScope,HomeButton中的iconHeigh,iconWidth和iconColor变为未定义或意外值。
任何意见,将不胜感激。
import React from 'react';
import { View, Text, TouchableOpacity } from 'react-native';
import { connect } from 'react-redux';
import { compose } from 'redux';
import { getColors, getStylesheet} from "../../styles/StyleManager";
const FooterButtonWrapper = (FooterButtonWrapped, onClick) => {
return class FooterButton extends React.Component {
constructor(props) {
super(props);
this.state = {
Theme: getStylesheet(),
colors: getColors()
}
}
_onClick = () => {
onClick(this.props.dispatch);
}
render() {
const { Theme, colors } = this.state;
return(
<TouchableOpacity onPress={this._onClick}>
<FooterButtonWrapped iconWidth={15} iconHeight={15} iconColor={"white"}/>
</TouchableOpacity>
)
}
}
}
const mapStateToProps = (state, ownProps) => ({});
const composeFooterButton = compose(
connect(mapStateToProps),
FooterButtonWrapper
);
export default composeFooterButton;
然后是一个使用它的按钮:
import React from 'react';
import { View, Text } from 'react-native';
import { push as gotoRoute } from 'react-router-redux';
import { FooterButtonWrapper } from './';
import { Home } from '../../assets';
const HomeButton = ({iconHeight, iconWidth, iconColor}) => (
<View>
<Home width={ iconWidth } height={ iconHeight } color={ iconColor }/>
<View><Text>Home</Text></View>
</View>
);
const _onClick = dispatch => {
dispatch( gotoRoute( '/' ));
}
export default FooterButtonWrapper(HomeButton, _onClick);
它就像你使用的那样发生
const composeFooterButton = compose(
connect(mapStateToProps),
FooterButtonWrapper
);
export default composeFooterButton;
用于HOC功能而不是Component。
compose
和connect
都可以包裹你的组件。所以你的HOC可能是:
import React from 'react';
import { View, Text, TouchableOpacity } from 'react-native';
import { connect } from 'react-redux';
import { compose } from 'redux';
import { getColors, getStylesheet } from '../../styles/StyleManager';
export default function FooterButtonWrapper(FooterButtonWrapped, onClick) {
class FooterButton extends React.Component {
constructor(props) {
super(props);
this.state = {
Theme: getStylesheet(),
colors: getColors(),
};
}
_onClick = () => {
onClick(this.props.dispatch);
};
render() {
const { Theme, colors } = this.state;
return (
<TouchableOpacity onPress={this._onClick}>
<FooterButtonWrapped
iconWidth={15}
iconHeight={15}
iconColor={'white'}
/>
</TouchableOpacity>
);
}
}
const mapStateToProps = (state, ownProps) => ({});
return connect(mapStateToProps)(FooterButton);
}