解決方案：
var el=$(this);
$scope.$apply(function () {
$scope.currentChallenge.comments.push({
"user": $scope.currentUser,
"message": el.val()
});
});

解決方案： var el=$(this); $scope.$apply(function () { $scope.currentChallenge.comments.push({ "user": $scope.currentUser, "message": el.val() }); });