选择随机图像，然后使用angularjs从unsplash api中选择

Question

我遇到使用angularjs从Unsplash API获取随机图像的问题。我尝试使用我找到的以下代码示例，但它不起作用：

$scope.images = function() {
$http({
  method: "GET",
  header: {
    'Content-Type': "application/json",
  },
  url: "https://unsplash.it/list",
}).then(function(res) {
    var totalFound = res.data;

    var photos = [];

    for (var i = 0; i < totalFound; i++) {
      var full = res.data[i].authors;
      var regular = res.data[i].filename;
      var thumb = res.data[i].posturl;

      photos.push({
        full: full,
        regular: regular,
        thumb: thumb
      });
    }

    $scope.photos = photos;
    console.log(totalFound);

  },
  function(res) {
    console.log('error', res);
  });
 }

$scope.images();

如果我尝试console.log（photos.tumb），我会得到未定义的