ios - 类型 '[AnyHashable : Any]?' 没有下标成员 - 使用 Moltin API

Question

我正在做一个 2015 年的教程，对 swift 非常陌生，我从 self.objects< 得到类型 [AnyHashable : Any]? has no subscript members 错误 行。

Moltin.sharedInstance().product.listing(withParameters: nil, success: { (responseDictionary)-> Void in
      //Assign Products array to object property
      self.objects = responseDictionary["result"] as! [AnyObject]

  }) { (responseDictionary, error) in
      print("Something went wrong!")
  }
}

Answer 1

重构您的代码以将响应正确地转换为字典。

Moltin.sharedInstance().product.listing(withParameters: nil, success: { (response) -> Void in
    //Assign Products array to object property

    guard let responseDictionary = response as? [String: AnyObject] else {
        return
    }

    self.objects = responseDictionary["result"] as! [AnyObject]
    print(self.objects)
    //Tell the table view to reload it's data
    self.tableView.reloadData()
}) { (responseDictionary, error) in
    print("Something went wrong!")
}

此后我尝试运行您的代码，它工作正常。 API 没有返回您期望的结果。让我们来看看...

let pagination = responseDictionary["pagination"]!
let results = responseDictionary["result"] as! [AnyObject]

print(pagination.count) // 8
print(results.count) // 0

如您所见，pagination 键下有 8 个值，而 results 键下有 0 个值。这意味着解析逻辑是正确的。如果有错误，它是在 API 端。API 不返回任何结果，这就是表格为空的原因。

祝你好运，但我希望这对你有所帮助!