React Native By Example

ListView with section headers

To set up our ListView to accommodate section headers, we need to make some modifications to the way we've been creating ListViews.

First, when we instantiate a new ListView DataSource, we'll be passing it a second callback, sectionHeaderHasChanged. Like rowHasChanged, this one checks to see whether a section header has changed. In your code, it looks something like this:

 this.state = {    ds: new ListView.DataSource({    rowHasChanged: (r1, r2) => r1 !== r2,    sectionHeaderHasChanged: (s1, s2) => s1 !== s2     }),   } 

Then, instead of calling cloneWithRows, we call the similarly named cloneWithRowsAndSections function:

const dataSource = this.state.ds.cloneWithRowsAndSections(this.state.listOfExpenses); 

Finally, ...