react-native-nlist

react-nativ listView Performance solution Native implementation Smooth memory recovery Pull up refresh drop-down loading Support native custom refreshing animation Support itemView dynamic height

Performance is better than all current list components.

中文

IOS Use TabView implementation

Be based on react-native-tableview

Android Use Recyclerview implementation

Recycling using duplicate templates

Performance testing

####ios use iphone 6s 10015 data, lots of pictures. No use of SDWebImage to optimize images. Fast slide to 4679th data Memory usage 111 MB

Android use MI 6 10015 data, lots of pictures. No use of Glide to optimize images.

Fast slide to 2569th data Android's list scroll speed has a maximum threshold. I plan for 2 minutes. Hand pain ~~(╯﹏╰) Memory usage 123 MB

installation

$ npm install react-native-nlist --save

configuration

iOS

1. In XCode, in the project navigator, right click your project name ➜ Add Files to
2. Go to node_modules ➜ react-native-nlist and add /node_modules/react-native-nlist/ios/RNNlistcode
3. Add MJRefresh use cocoapods Create podfile under your IOS project /ios/Podfile

 # Uncomment the next line to define a global platform for your project
platform :ios, '8.0'
target 'demo' do
  # Uncomment the next line if you're using Swift or would like to use dynamic frameworks
  # use_frameworks!
  # Pods for Driver
  use_frameworks!
  pod 'MJRefresh'
end

post_install do |installer|
  installer.pods_project.targets.each do |target|
    target.build_configurations.each do |config|
      config.build_settings['SWIFT_VERSION'] = '4.0'
    end
  end
end

pod 'MJRefresh' Execute a command pod install 4. Run your project .xcworkspace (Cmd+R)<

Android

1. Open up android/app/src/main/java/[...]/MainActivity.java

• Add import com.janiokq.Nlist.RNNlistPackage; to the imports at the top of the file
• Add new RNNlistPackage() to the list returned by the getPackages() method

2. Append the following lines to android/settings.gradle:

   include ':react-native-nlist'
   project(':react-native-nlist').projectDir = new File(rootProject.projectDir, 	'../node_modules/react-native-nlist/android')

3. Insert the following lines inside the dependencies block in android/app/build.gradle:

     compile project(':react-native-nlist')

Attribute description

onScroll

{ x:x, y:y, nx:nx, ny:ny, }

android only nx,ny android is The last rolling start difference The negative number is upward. The positive number is downward.

reactModuleForCell

ios  Template name     AppRegistry.registerComponent   generate
  
AppRegistry.registerComponent('Itemlist', () => Itemlist);

renderItem

android  Template name     A class name or function name.   

springback

android specific scroll rebound effect similar to IOS

canRefresh

Whether to use drop-down refresh

canLoadmore

Whether to use pull-up refresh

refreshState

Refresh state control

loadinState

Load state control

onRefresh

Refresh event

onLoadmore

Load event

dataSource

data source Array Object You must have the height attribute.

reference

Access to reference Component methods

method

scrollToPosition

```
      /**
        * @param index items
        */
        scrollToPosition(index: number);

```

Usage

list Use

import RNNlist from 'react-native-nlist';

// TODO: What to do with the module?
RNNlist;
 <RNNlist

        reference={(r)=>{
                  this.RNNlist = r;
        }}

        onScroll={(e)=>{

                  //  e.nativeEvent.contentOffset
                  // {
                  //   x:x,
                  //   y:y,
                  //   nx:nx,
                  //   ny:ny,
                  // }

                  //   android only
                  //   nx,ny  android is   The last rolling start difference       The negative number is upward.      The positive number is downward. 

        }}


        // only  android    
        // onScrollto={(e)=>{    abandoned
        //     // o and 1    
        //     // 1  Scroll to the head
        //     // 0  Scroll to the bottom
        //     //e
        //     alert(JSON.stringify(e))
        // }}

        inserttheway={0}
        //ios  Rendering template
        reactModuleForCell="Itemlist"
        //android  Rendering template
        renderItem={Itemlist}
        //Rendering initialization of Android
        Initializeprops={{}}

        //Android rolling rebound effect
        springback={true}
        //Android template quantity
        // rowHeight={40}
        
        style={{
          flex:1,
          // width:width,
          // height:height
        }}

        canRefresh={true}
        canLoadmore={true}

        refreshState={this.state.refreshState}
        loadinState={this.state.loadinState}
        dataSource={this.state.dataSource}

        onRefresh={()=>{
          setTimeout(()=>{
            this.getdata();
          },1000)
        }}
        onLoadmore={()=>{
          setTimeout(()=>{
            this.adddata();
          },1000)
        }}
    />

Template registration

class Itemlist extends  Component{
  constructor(props){
    super(props)
  }
  render() {
    let data  =  this.props;
    if(Platform.OS=='ios'){
        data =this.props.data;
    }

    return (
      <View style={{flex:1,}} >
            <View style={{
                width:width,
                height:data.height,
              }} >

              <Text>{data.index}</Text>

              <Image 
              // source={{
              //   uri:'http://img3.imgtn.bdimg.com/it/u=3360690558,3623061169&fm=11&gp=0.jpg'
              // }}
              source={{uri: 'https://ss3.bdstatic.com/70cFv8Sh_Q1YnxGkpoWK1HF6hhy/it/u=3360690558,3623061169&fm=111&gp=0.jpg'}}
              style={{
                width:width,
                height:data.height-30,
              }}
              resizeMode='stretch'
              />

              </View>
      </View>
    )
  }
}

AppRegistry.registerComponent('Itemlist', () => Itemlist);