How to use React native ListView to add top pull-down refresh and bottom click refresh

This time I will show you how to use React native ListView to increase the top pull-down refresh and bottom click to refresh, and how to use React native ListView to increase the top pull-down refresh and bottom click to refresh. What are the precautions?, here is the actual combat Let’s take a look at the case.

1. Click refresh at the bottom

1.1 First add a button

render() {
  if(!this.state.data){
   return(
     <text>Loading... </text>
   )
  }else{
   return(
     <listview></listview>
      }
      dataSource={this.state.data}
      renderRow={(rowData)=>this.renderRow(rowData)}
      renderFooter={this.renderFooter.bind(this)}
     >
      
 
   );
  }
 }
 
renderFooter(){
   return (
   <view>
      <button></button>
    </view>
   )
 }

Add a renderFooter method to ListView to draw the bottom element. Display a button inside.

Button processing logic:

addMoreOnFoot(){
 // alert('addMoreOnFoot')
 // console.log('addMoreOnFoot')
 const url = 'http://127.0.0.1/getFootContent?lastid=' + this.state.footLastId + '&count=20&isTop=0'
 fetch(url)
 .then((response)=>response.json())
 .then((jsondata)=>{
   if (jsondata.data && jsondata.data.length > 0){
   const rowData = this.state.jsondata.concat(jsondata.data);
   this.setState({
    footLastId:jsondata.data[jsondata.data.length - 1]['id'],
    jsondata:rowData,
    data:new ListView.DataSource({rowHasChanged:(r1, r2) => r1 != r2}).cloneWithRows(rowData),
   })
   }
 })
 .catch((error)=>{
  alert(error);
 });
}

After clicking, network processing is performed, and the last id is also passed to the server, and the server returns the 20 records after this id. Then resetState.

2. Head pull-down refresh

Add RefeshControl in ListView

render() {
  if(!this.state.data){
   return(
     <text>Loading... </text>
   )
  }else{
   return(
 
     <listview></listview>
      }
      dataSource={this.state.data}
      renderRow={(rowData)=>this.renderRow(rowData)}
      renderFooter={this.renderFooter.bind(this)}
     >
      
 
   );
  }
 }

Load the latest header data and add it to this.State

reloadWordData(){
  // alert(this.state.topLastId)
  const url = 'http://127.0.0.1/getFootContent?lastid=' + this.state.topLastId + '&count=20&isTop=1'
  fetch(url)
  .then((response)=>response.json())
  .then((jsondata)=>{
    if (jsondata.data && jsondata.data.length > 0){
    const rowData = jsondata.data.concat(this.state.jsondata);
    this.setState({
     topLastId:jsondata.data[0]['id'],
     jsondata:rowData,
     data:new ListView.DataSource({rowHasChanged:(r1, r2) => r1 != r2}).cloneWithRows(rowData),
    })
    }
  })
  .catch((error)=>{
   alert(error);
  });
 }

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

Recommended reading:

How to use vue.extend to implement the alert modal box pop-up component

How to use vue components Implement pop-up box click to show and hide

The above is the detailed content of How to use React native ListView to add top pull-down refresh and bottom click refresh. For more information, please follow other related articles on the PHP Chinese website!