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ReactNative之利用MVC瞬间搭建设置界面

96
袁峥
2017.05.19 23:49* 字数 399

前言

眼看很多公司都开始尝试使用ReactNative,达到跨平台开发,最近也写了很多文章,希望让更多想了解的同学快速上手ReactNative.

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ReactNative之利用MVC瞬间搭建设置界面

  • 在RN中,没有分组样式的ListView,而设置界面一般都需要分组样式,因此又得自己封装一套了。
  • 这里我采用MVC的思想快速搭建设置界面。
  • 组与组之间的间距:就用每一组的头部视图去做。

先看如何使用

  • 用法非常简单,就配置下模型,界面就换了.
  • 点击cell跳转,也封装到模型中了.
constructor(props){
        super(props);

        var groups = [];

        this.setupGroup0(groups);

        this.setupGroup1(groups);
        
        this.state = {
            groups:groups
        }
    }

    // 设置第0组
    setupGroup0(groups){
        // 创建行模型
        var item0 = new CommonSwitchItem('','消息推送','');
        var item1 = new CommonSwitchItem('','图书借阅','');
        var item2 = new CommonArrowItem('','解绑设备','');

        // 创建第0组
        var group = new CommonGroupItem([item0,item1,item2],10);

        groups.push(group);
    }

    // 设置第1组
    setupGroup1(groups){
        // 创建行模型
        var item0 = new CommonArrowItem('','意见反馈','');
        var item1 = new CommonArrowItem('','关于技术圈','');

        // 创建第1组
        var group = new CommonGroupItem([item0,item1],10);

        groups.push(group);
    }
    
    render() {
        return (
            <View style={styles.viewStyle}>
                <CommonNavigationBar title={this.props.title}
                                     leftBarButtonItem={this.renderLeftBarButtonItem()}
                />
                <CommonGroupListView commonGroupListViewStyle={{backgroundColor:Common.bgColor}}
                                     dataBlob={this.state.groups}
                                     subTitleStyle={{position:'absolute',right:0}}
                                     navigator={this.props.navigator}
                                     renderFooter={this._renderFooter.bind(this)}
                />
            </View>
        );
    }

    // 渲染底部View
    _renderFooter(){
        return (
            <TouchableOpacity style={{height:60,justifyContent:'flex-end',alignItems:'center'} }>
                <Text style={styles.loginStyle}>立即登录</Text>
            </TouchableOpacity>
        )
    }
}
  • 效果
效果.png

思路:1.自定义分组ListView

  • 暴露属性
static propTypes = {
        // 组模型数据CommonGroupItem
        dataBlob:PropTypes.array,
        // listView样式
        commonGroupListViewStyle:PropTypes.object,
        // cell title样式:因为一个ListViewcell就一种样式,就定义在ListView中,如果不一样,就定义在模型
        titleStyle:PropTypes.oneOfType([PropTypes.object,PropTypes.string]),
        // cell image样式
        imageStyle:PropTypes.oneOfType([PropTypes.object,PropTypes.string]),
        // cell 子标题样式
        subTitleStyle:PropTypes.oneOfType([PropTypes.object,PropTypes.string]),
        // 渲染头部
        renderHeader:PropTypes.func,
        // 渲染尾部
        renderFooter:PropTypes.func
    };
  • CommonGroupListView代码
/**
 * Created by ithinkeryz on 2017/5/17.
 */
/**
 * Created by ithinkeryz on 2017/5/15.
 */

import React, { Component,PropTypes } from 'react';

import {
    AppRegistry,
    StyleSheet,
    Text,
    View,
    ListView
} from 'react-native';

import CommonArrowItem from './CommonArrowItem'
import CommonRowCell from './CommonRowCell'

export default class CommonGroupListView extends Component {

    static propTypes = {
        // 组模型数据CommonGroupItem
        dataBlob:PropTypes.array,
        // listView样式
        commonGroupListViewStyle:PropTypes.object,
        // cell title样式:因为一个ListViewcell就一种样式,就定义在ListView中,如果不一样,就定义在模型
        titleStyle:PropTypes.oneOfType([PropTypes.object,PropTypes.string]),
        // cell image样式
        imageStyle:PropTypes.oneOfType([PropTypes.object,PropTypes.string]),
        // cell 子标题样式
        subTitleStyle:PropTypes.oneOfType([PropTypes.object,PropTypes.string]),
        // 渲染头部
        renderHeader:PropTypes.func,
        // 渲染尾部
        renderFooter:PropTypes.func
    };

    constructor(props){
        super(props);

        var ds = new ListView.DataSource({
            rowHasChanged:(r1,r2)=>r1 != r2,
            sectionHeaderHasChanged:(s1,s2)=>s1!=s2
        });

        // 处理组数据,把传递过来的组模型,转换为{s1:[rowData]}
        var dataBlob = this.props.dataBlob;

        var sectionData = {};

        dataBlob.forEach((obj,index)=>{
            sectionData[index.toString()] = obj.rowData;
        });

        ds = ds.cloneWithRowsAndSections(sectionData);

        this.state = {
            ds:ds
        }

    }

    render() {

        console.log(this.props.renderFooter);

        return (
            <ListView dataSource={this.state.ds}
                      renderRow={this._renderRow.bind(this)}
                      renderSectionHeader={this._renderSectionHeader.bind(this)}
                      style={this.props.commonGroupListViewStyle}
                      renderFooter={this.props.renderFooter?this.props.renderFooter:undefined}
                      renderHeader={this.props.renderHeader?this.props.renderHeader:undefined}

            />
        );
    }

    // 渲染行
    _renderRow(rowData, sectionID, rowID){

        return (
            <CommonRowCell rowData={rowData} {...this.props}/>
        )
    }

    // 渲染组头部视图
    _renderSectionHeader(sectionData, sectionID){


        var sectionData = this.props.dataBlob[sectionID];

        return (
            <View style={[styles.sectionHeaderStyle,{height:sectionData.sectionHeight}]}>

            </View>
        )
    }
}

var styles = StyleSheet.create({
    viewStyle:{
        backgroundColor:'red',
        flex:1
    },
    sectionHeaderStyle:{
        backgroundColor:'transparent'
    }
});

思路:2.设计组模型

function CommonGroupItem(rowData,sectionHeight) {

    // 组与组之间间距,每组头部视图的高度
    this.sectionHeight = sectionHeight;

    // 每一组的数据
    this.rowData = rowData;
}

module.exports = CommonGroupItem;

思路:3.设计行模型

  • 因为Cell有不同的样式,比如有开关,有箭头,可以根据不同类型cell模型,展示不同的cell样式,搞个基本的cell行模型,存放公用的属性

  • 基本cell模型

function CommonRowItem(image,title,subTitle) {
    this.image = image;
    this.title = title;
    this.subTitle = subTitle;

    // 跳转界面
    this.route = null;

    // 标题样式没必要定义在模型,样式并不是每个都不一样

    // 样式应该定义到ListView,每个ListView一个

}

module.exports = CommonRowItem;
  • 开关cell模型

  • 箭头cell模型
import CommonRowItem from './CommonRowItem'


function CommonSwitchItem(image,title,subTitle) {

    CommonRowItem.call(this,image,title,subTitle);

    // 开关
    this.isOn = false;

    // 不能使用,一般开关cell不需要点击
    this.disabled = true;
    // 标题样式没必要定义在模型,样式并不是每个都不一样

    // 样式应该定义到ListView,每个ListView一个
}

module.exports = CommonSwitchItem;

思路:4.自定义cell

  • 暴露属性
static propTypes = {
        rowData:PropTypes.object,
        cellStyle:PropTypes.oneOfType([PropTypes.object,PropTypes.string]),
        titleStyle:PropTypes.oneOfType([PropTypes.object,PropTypes.string]),
        imageStyle:PropTypes.oneOfType([PropTypes.object,PropTypes.string]),
        subTitleStyle:PropTypes.oneOfType([PropTypes.object,PropTypes.string]),
    };
  • 设置右边样式
  • 根据类型判断,每个对象的构造方法的名称就是类名
  • 监听cell点击,点击的时候跳转,记得把navigator传递进来,模型保存route属性
this.props.rowData.constructor.name
  • 完整代码
/**
 * Created by ithinkeryz on 2017/5/19.
 */


import React, { Component,PropTypes } from 'react';

import {
    AppRegistry,
    StyleSheet,
    Text,
    View,
    Image,
    Switch,
    TouchableOpacity
} from 'react-native';


export default class CommonRowCell extends Component {

    static propTypes = {
        rowData:PropTypes.object,
        cellStyle:PropTypes.oneOfType([PropTypes.object,PropTypes.string]),
        titleStyle:PropTypes.oneOfType([PropTypes.object,PropTypes.string]),
        imageStyle:PropTypes.oneOfType([PropTypes.object,PropTypes.string]),
        subTitleStyle:PropTypes.oneOfType([PropTypes.object,PropTypes.string]),
    };

    constructor(props){
        super(props);

        this.state = {
            isOn:this.props.rowData.isOn
        }

    }



    render() {

        return (

            <TouchableOpacity style={styles.cellStyle}
                              disabled={this.props.rowData.disabled}
                              onPressOut={this.clickCell.bind(this)}
            >

                {/*image*/}
                {this.props.rowData.image?<Image source={{uri:this.props.rowData.image}} style={[styles.imageStyle,this.props.imageStyle]}/>:null}

                <View style={styles.middleViewStyle}>
                    {/*title*/}
                    <Text style={[styles.titleStyle,this.props.titleStyle]}>{this.props.rowData.title}</Text>

                    {/*subtitle*/}
                    <Text style={[styles.subTitleStyle,this.props.subTitleStyle]}>{this.props.rowData.subTitle}</Text>
                </View>

                {/*accessoryView*/}
                {this.setupAccessoryView()}

            </TouchableOpacity>
        );
    }

    // onValueChange={(value)=>{}
    // 设置右边附近View
    setupAccessoryView(){

        // console.log(typeof this.props.rowData);

        // 如何判断当前对象属于哪个类,获取构造方法名称,构造方法名称都是类名
        if (this.props.rowData.constructor.name === 'CommonArrowItem'){

            return <Image source={require('./icon_shike_arrow.png')} style={{marginLeft:10,width:7,height:12,marginRight:10}}/>

        } else if (this.props.rowData.constructor.name === 'CommonSwitchItem') {

            return <Switch style={{marginLeft:10,marginRight:10}}
                           onValueChange={(value => {
                               this.setState({
                                   isOn:value,
                               });
                               this.props.rowData.isOn = value
                           })}
                           value={this.state.isOn}
                   />
        }

    }

    // 点击Cell
    clickCell(){
        if (this.props.rowData.route){
            this.props.navigator.push({
                component: this.props.rowData.route.component,
                title: this.props.rowData.route.title,
                passPros: this.props.rowData.route.passPros,
                backButtonIcon: this.props.rowData.route.backButtonIcon,
                backButtonTitle: this.props.rowData.route.backButtonTitle,
                leftButtonIcon: this.props.rowData.route.leftButtonIcon,
                leftButtonTitle: this.props.rowData.route.leftButtonTitle,
                onLeftButtonPress: this.props.rowData.route.onLeftButtonPress,
                rightButtonIcon: this.props.rowData.route.rightButtonIcon,
                rightButtonTitle: this.props.rowData.route.rightButtonTitle,
                onRightButtonPress: this.props.rowData.route.onRightButtonPress
            })
        }
    }
}

var cellH = 44;
var styles = StyleSheet.create({
    imageStyle:{
        width:20,
        height:20,
        marginLeft:10
    },
    cellStyle:{
        flexDirection:'row',
        alignItems:'center',
        height:cellH,
        backgroundColor:'white',
        borderBottomWidth:1,
        borderBottomColor:'#e5e5e5'


    },
    middleViewStyle:{
        height:cellH,
        flexDirection:'row',
        alignItems:'center',
        flex:1,
        marginLeft:10
    },
    titleStyle:{
        color:'rgb(96,96,96)'
    },
    subTitleStyle:{
        color:'rgb(207,207,207)',
        marginLeft:10
    }

});

思路:5.创建组模型,搭建界面

/**
 * Created by ithinkeryz on 2017/5/19.
 */

import React, { Component } from 'react';

import {
    AppRegistry,
    StyleSheet,
    Text,
    View,
    TouchableOpacity
} from 'react-native';

import CommonNavigationBar from '../Common/CommonNavigationBar'
import CommonHighButton from '../Common/CommonHighButton'
import Common from './../Common/Common'

import CommonGroupListView from '../CommonGroupListView/CommonGroupListView'

import CommonGroupItem from '../CommonGroupListView/CommonGroupItem'

import CommonArrowItem from '../CommonGroupListView/CommonArrowItem'

import CommonSwitchItem from '../CommonGroupListView/CommonSwitchItem'

export default class Setting extends Component {

    constructor(props){
        super(props);

        var groups = [];

        this.setupGroup0(groups);

        this.setupGroup1(groups);

        this.state = {
            groups:groups
        }
    }

    // 设置第0组
    setupGroup0(groups){
        // 创建行模型
        var item0 = new CommonSwitchItem('','消息推送','');
        var item1 = new CommonSwitchItem('','图书借阅','');
        var item2 = new CommonArrowItem('','解绑设备','');

        // 创建第0组
        var group = new CommonGroupItem([item0,item1,item2],10);

        groups.push(group);
    }

    // 设置第1组
    setupGroup1(groups){
        // 创建行模型
        var item0 = new CommonArrowItem('','意见反馈','');
        var item1 = new CommonArrowItem('','关于技术圈','');

        // 创建第1组
        var group = new CommonGroupItem([item0,item1],10);

        groups.push(group);
    }

    render() {
        return (
            <View style={styles.viewStyle}>
                <CommonNavigationBar title={this.props.title}
                                     leftBarButtonItem={this.renderLeftBarButtonItem()}
                />
                <CommonGroupListView commonGroupListViewStyle={{backgroundColor:Common.bgColor}}
                                     dataBlob={this.state.groups}
                                     subTitleStyle={{position:'absolute',right:0}}
                                     navigator={this.props.navigator}
                                     renderFooter={this._renderFooter.bind(this)}
                />
            </View>
        );
    }

    // 渲染底部View
    _renderFooter(){
        return (
            <TouchableOpacity style={{height:60,justifyContent:'flex-end',alignItems:'center'} }>
                <Text style={styles.loginStyle}>立即登录</Text>
            </TouchableOpacity>
        )
    }


    renderLeftBarButtonItem(){
        return (
            <CommonHighButton imageUri='btn_backitem'
                              imageStyle={{width:20,height:20}}
                              buttonStyle={{position:'absolute',left:5}}
                              onPressOut={()=>{
                                  this.props.navigator.pop();
                              }}
            />
        )
    }



}

var styles = StyleSheet.create({
    viewStyle:{
        backgroundColor:Common.bgColor,
        flex:1
    },
    loginStyle:{
        height:35,
        width:Common.screenW,
        textAlign:'center',
        color:'red',
        backgroundColor:'white',
        lineHeight:35,
        fontSize:15
    }
});
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