React Native Warning

1 VirtualizedList: missing keys for items, make sure to specify a key property on each item or provide a custom keyExtractor.

export default class ReactDemo extends Component {
  constructor(props){
    super(props);
    this.state = {text:''};
  }
  
    _extraUniqueKey(item ,index){ return "index"+index+item; };
    
    render() {
    return (
        
           {item}}
              renderSectionHeader={({section}) => {section.title}}
              keyExtractor = {this._extraUniqueKey}  
          />
        

      );
  }
}

只需在上面相应位置添加 
 _extraUniqueKey(item ,index){ return "index"+index+item; };
 keyExtractor = {this._extraUniqueKey}
即可

2 VirtualizedSectionList 'section' you supplied is missing the 'key' property.

上图代码里 sections里的item对象都加上'key'字段即可