AngularJS服务函数在while循环完成后未返回完整的promise

app.service('myService', function($q) {
  this.myFunction = function() {
    var deferred = $q.defer();
    var count = 0;

    var asyncOperation = function() {
      // 模拟异步操作
      setTimeout(function() {
        count++;
        console.log('Async operation ' + count + ' completed.');

        // 更新deferred对象的状态
        deferred.notify(count);

        if (count < 5) {
          // 继续进行下一次异步操作
          asyncOperation();
        } else {
          // 所有异步操作完成，返回最终结果
          deferred.resolve('All async operations completed.');
        }
      }, 1000);
    };

    asyncOperation();

    // 返回promise对象
    return deferred.promise;
  };
});

myService.myFunction().then(function(result) {
  console.log(result);
}, function(error) {
  console.error(error);
}, function(progress) {
  console.log('Progress: ' + progress);
});