react-narive-picker+ sectionList高性能的分组列表组件+webview

来源：互联网发布：安卓模拟器知乎编辑：程序博客网时间：2024/06/11 00:24

(1) react-native-picker第三方组件

(1)安装

npm install react-native-picker --save

(2) link

react-native link react-native-picker

(3) 引入

import Picker from 'react-native-picker'

(4) 使用
(一) Picker.init选项
pickerData ：数据源
selectedValue ：默认选择第几项
pickerConfirmBtnText ：确定按钮
pickerCancelBtnText ：取消按钮
pickerTitleText ：pickerToolBar的标题
pickerToolBarBg ：顶部菜单背景（pickerToolBar背景）
pickerBg ：选项内容的背景
pickerToolBarFontSize ：顶部菜单文字大小
pickerFontSize ：选项内容文字大小
onPickerConfirm() ：点击确定按钮后执行的函数
onPickerCancel() ：取消后执行的回调函数
onPickerSelect() ：选择后执行的回掉函数

示例代码：

_pickerShow(){        Picker.init({            pickerData: [                    {                      北京:[                              {                                  朝阳区:['艾欧尼亚','暗影岛']                              },                              {                                  东城区:['艾欧尼亚2','暗影岛2']                              }                             ]                    },                    {                        重庆:[                            {                                渝北区:['光电园','嘉州']                            },                            {                                江北区:['观音桥','华新街']                            }                        ]                    },                ],            selectedValue: ['重庆','渝北区','嘉州'],            pickerConfirmBtnText:'确定',            pickerCancelBtnText:'取消',            pickerTitleText:'选择城市',            pickerToolBarBg: [232, 232, 232, 1],            pickerBg:[245,245,245,1],            pickerToolBarFontSize: 16,            pickerFontSize: 20,            onPickerConfirm: (data) => {                // console.log(data)                var pp = JSON.stringify(data)                AsyncStorage.setItem('cityContent',pp)                AsyncStorage.getItem('cityContent').then( (data) => {                    var mm = JSON.parse(data)                    this.setState({                        cityContent: mm                    })                })            }        });        Picker.show();    }---------------------------------------------------- <TouchableNativeFeedback         onPress={ this._pickerShow.bind(this) }  >             <View style={ styles.cityContainer}>                       <Text style={ styles.cityText}>选择城市：</Text>                       <Text style={styles.cityText_showtext}>                            {this.state.cityContent}                       </Text>            </View> </TouchableNativeFeedback>

(github地址)https://github.com/beefe/react-native-picker/blob/master/README.md
http://www.jianshu.com/p/90f8d1f3d638

效果图

效果图2

(2) sectionList分组列表组件（这个组件踩了很多坑）

(1)常用属性：

sections ：数据源，数据格式是数组Array
renderItem ：每一个section(分组)中的item(列表)
renderSectionHeader ：每个section(分组)中的header(头部)
keyExtractor ：为每一个item生成唯一的key，也可以在所有的对象数组中都加上key,就不会出现黄色的缺少key的警告
refreshing ：是否处于刷新状态（和flatList，listView一样）
onRefresh ：下拉刷新（和flatList，listView一样）
onEndReached ：上拉加载（和flatList，listView一样）
onEndReachedThreshold ：到底部多大距离触发上拉加载（和flatList，listView一样）
ItemSeparatorComponent ：每个item的分割组件，不会出现在第一行之前和最后一行之后(注意是组件哦，第一个字母要大写)
SectionSeparatorComponent ：每个分组的分割组件。(注意是组件哦，第一个字母要大写)
ListHeaderComponent ：头部组件(注意是组件哦，第一个字母要大写)
ListFooterComponent ：尾部组件(注意是组件哦，第一个字母要大写)

(2)关于sectios数据源

注意，这里坑比较多
(1) sectons数组里面，必须是 key和data，不能换成其他的属性变量，比如：data不能换成value
(2) 数据的格式必须是：

const array =  [            {  key:'xxx',data:[ {title:'xxx',content:'xxx'} ,{title:'xxx',content:'xxx'}]  } ,       {  key:'xxx',data:[ {title:'xxx',content:'xxx'} ,{title:'xxx',content:'xxx'}]  } ,        ....    ]

(3) 使用例子

render() {        return (            <View style={styles.container}>                <SectionList                    sections={ Data.data }                    renderItem= { this._renderItem }                    renderSectionHeader = { this._renderSectionHeader}                    keyExtractor={(item,index)=>("index"+index+item)}                    SectionSeparatorComponent={()=><View style={{height:20,backgroundColor:'blue'}}></View>}                    ItemSeparatorComponent={ () => <View style={{height:3,backgroundColor:'#ffb02e'}}></View>}                />            </View>        );    }----------------------------------------------------- _renderItem(item){        console.log(item)        return(            <View>                <Text style={{ color: 'blue' }}>{ item.item.title }</Text>                <Text style={{ color: 'green' }}>{ item.item.content }</Text>            </View>        )    }    _renderSectionHeader(header) {        return (            <Text  style={{ color: 'red' }}>                { header.section.key}            </Text>        )    }----------------------------------------mock的JSON数据：引入是取名是Data，所以sections数据源用Data.data取到数组{    "data":[        {            "key":"居家易肝病",            "data":[                { "title": "53种病停止输注抗菌药 乱输液有七大危害",                  "content":"http://jiankang.163.com/17/0801/14/CQOQGE2N0038804U.html",                  "date":"2017-08-01 14:00",                  "image":"http://imgsize.ph.126.net/?imgurl=http://cms-bucket.nosdn.127.net/32e39ba9aed74dfa845708493f897ba320170801140018.png_150x100x1x85.jpg"                },                { "title": "生男生女神药”真的神？不靠谱别上当",                    "content":"http://jiankang.163.com/17/0801/14/CQOQGE2N0038804U.html",                    "date":"2017-07-31 12:10",                    "image":"http://imgsize.ph.126.net/?imgurl=http://cms-bucket.nosdn.127.net/44f4e117250d49e8aa9f0150e7b503a820170731121632.png_150x100x1x85.jpg"                },                { "title": "专家建议：预防药物性肝病莫乱服药",                    "content":"http://jiankang.163.com/17/0801/14/CQOQGE2N0038804U.html",                    "date":"2017-08-01 14:00",                    "image":"http://imgsize.ph.126.net/?imgurl=http://cms-bucket.nosdn.127.net/a46d0f817efe42e8aa93b28fd747e58220170728100007.png_150x100x1x85.jpg"                },                { "title": "北京人期望寿命82.03岁 高于全国平均水平",                    "content":"http://jiankang.163.com/17/0801/14/CQOQGE2N0038804U.html",                    "date":"2017-08-01 14:00",                    "image":"http://imgsize.ph.126.net/?imgurl=http://cms-bucket.nosdn.127.net/32e39ba9aed74dfa845708493f897ba320170801140018.png_150x100x1x85.jpg"                }, { "title": "人社部解读36种药品进入医保药品目录",                    "content":"http://jiankang.163.com/17/0801/14/CQOQGE2N0038804U.html",                    "date":"2017-08-01 14:00",                    "image":"http://imgsize.ph.126.net/?imgurl=http://cms-bucket.nosdn.127.net/32e39ba9aed74dfa845708493f897ba320170801140018.png_150x100x1x85.jpg"                }            ]        },        {            "key":"居家易肺病",            "data":[                { "title": "53种病停止输注抗菌药 乱输液有七大危害",                    "content":"http://jiankang.163.com/17/0801/14/CQOQGE2N0038804U.html",                    "date":"2017-08-01 14:00",                    "image":"http://imgsize.ph.126.net/?imgurl=http://cms-bucket.nosdn.127.net/32e39ba9aed74dfa845708493f897ba320170801140018.png_150x100x1x85.jpg"                },                { "title": "生男生女神药”真的神？不靠谱别上当",                    "content":"http://jiankang.163.com/17/0801/14/CQOQGE2N0038804U.html",                    "date":"2017-07-31 12:10",                    "image":"http://imgsize.ph.126.net/?imgurl=http://cms-bucket.nosdn.127.net/44f4e117250d49e8aa9f0150e7b503a820170731121632.png_150x100x1x85.jpg"                },                { "title": "专家建议：预防药物性肝病莫乱服药",                    "content":"http://jiankang.163.com/17/0801/14/CQOQGE2N0038804U.html",                    "date":"2017-08-01 14:00",                    "image":"http://imgsize.ph.126.net/?imgurl=http://cms-bucket.nosdn.127.net/a46d0f817efe42e8aa93b28fd747e58220170728100007.png_150x100x1x85.jpg"                },                { "title": "北京人期望寿命82.03岁 高于全国平均水平",                    "content":"http://jiankang.163.com/17/0801/14/CQOQGE2N0038804U.html",                    "date":"2017-08-01 14:00",                    "image":"http://imgsize.ph.126.net/?imgurl=http://cms-bucket.nosdn.127.net/32e39ba9aed74dfa845708493f897ba320170801140018.png_150x100x1x85.jpg"                }, { "title": "人社部解读36种药品进入医保药品目录",                    "content":"http://jiankang.163.com/17/0801/14/CQOQGE2N0038804U.html",                    "date":"2017-08-01 14:00",                    "image":"http://imgsize.ph.126.net/?imgurl=http://cms-bucket.nosdn.127.net/32e39ba9aed74dfa845708493f897ba320170801140018.png_150x100x1x85.jpg"                }            ]        }    ]}

效果图：

效果图

http://blog.csdn.net/mengks1987/article/details/70236823
http://www.jianshu.com/p/6302c4d48b97
(清晰)https://segmentfault.com/a/1190000009736867
(详细)http://blog.csdn.net/qq_38453189/article/details/72810741
(scrollView,listView,flatList,sectionList的区别)http://www.jianshu.com/p/6302c4d48b97
http://www.jianshu.com/p/346474013915

(3)WebView

属性：

source ：需要加载网页的网址
automaticallyAdjustContentInsets ：是否自动调整内容，默认是true

 <WebView           source={{uri: params.webview }}           automaticallyAdjustContentInsets={true}                         />

(常用属性)http://www.jianshu.com/p/bce419c39af3
(详细)http://blog.csdn.net/sinat_17775997/article/details/60872714
(踩坑)http://www.jianshu.com/p/f963839fca1a
效果图：

webview

(ReactNative实现图片上传功能 )http://blog.csdn.net/codetomylaw/article/details/52446786
(React-native使用FormDate上传图片异常总结)http://www.jianshu.com/p/b5c81d7dfbb9
(react-native图片循环上传七牛)http://www.jianshu.com/p/1b78787c56be
(七牛上传图片的了解与使用)http://www.jianshu.com/p/5d7b5324786d

作者：省局到
链接：http://www.jianshu.com/p/ea94c8c1ee44
來源：简书
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