angular$index获取ng-repeat的上一条数据

<div ng-repeat="item in dataList" ng-click="func($index,$index-1)"></div>

$scope.func = function(thisIndex,preIndex){
  var thisIndexDataName = $scope.dataList[thisIndex].dataName;//当前这条数据对应dataName
  var preIndexDataName = $scope.dataList[preIndex].dataName;//上一条数据里对应的dataName
}