angular $index獲取ng-repeat的上一條數據

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

$scope.func = function(thisIndex,preIndex){
  var thisIndexDataName = $scope.dataList[thisIndex].dataName;//當前這條數據對應dataName
  var preIndexDataName = $scope.dataList[preIndex].dataName;//上一條數據里對應的dataName
}