react-native 一些基本语法

1. 循环

    {this.state.jobs.map((job, i) => (                                                                                     
   ))}

2. 页面滑动到底部做的操作

    <ScrollView onMomentumScrollEnd={this.contentViewScroll}> 
   contentViewScroll(e: Object){
       let offsetY = e.nativeEvent.contentOffset.y; //滑动距离
       let contentSizeHeight = e.nativeEvent.contentSize.height; //scrollView contentSize高度
       let originScrollHeight = e.nativeEvent.layoutMeasurement.height; //scrollView高度
       if (offsetY + originScrollHeight >= contentSizeHeight){
         console.log("到底部了")
       }
     }