不能为'String: AnyObject '类型的值加上'String'的索引

I'm trying to get some data from a JSON content(in my data.swift file) and assign it to "comments". Anyone know whats going wrong here and how I can fix it? Seems like a syntax issue that I'm having trouble with.

我试图从JSON内容(在我的数据中)获取一些数据。并将其分配给“评论”。有人知道这里出了什么问题吗?似乎是我遇到的语法问题。

The error I am getting:

我的错误是:

import UIKit

class CommentsTableViewController: UITableViewController {

var story = [String:AnyObject]()
var comments = [String:AnyObject]()

override func viewDidLoad() {
    super.viewDidLoad()

    comments = story["comments"]

    tableView.estimatedRowHeight = 140
    tableView.rowHeight = UITableViewAutomaticDimension
}

It's not liking the comments = story["comments"] part.

它不喜欢评论=故事[评论]部分。

2 个解决方案

#1

There is an error in your code, but the error message you're seeing is incorrect and misleading due to a Swift compiler bug. The actual error message should read: AnyObject is not convertible to [String:AnyObject].

您的代码中有一个错误，但是由于Swift编译错误，您看到的错误消息是错误的，并且具有误导性。实际的错误消息应该是:AnyObject不能转换为[String:AnyObject]。

self.story["comments"] returns an AnyObject. To assign that value to self.comments you must first typecast AnyObject to the Dictionary type [String:AnyObject].

自我。("评论")返回一个AnyObject故事。要将该值赋值给self.comments，您必须首先将AnyObject类型转换为Dictionary类型[String:AnyObject]。

For example:

例如:

self.comments = self.story["comments"] as! [String:AnyObject]

#2

According to your own declaration, story is a [String:AnyObject]. That means that story["comments"] is an AnyObject. But comments is a [String:AnyObject], not an AnyObject. You can't assign an AnyObject where a [String:AnyObject] is expected.

根据您自己的声明，story是一个[String:AnyObject]。这意味着故事(“评论”)是一个任何对象。但是注释是一个[String:AnyObject]，而不是AnyObject。您不能在期望使用[String:AnyObject]的地方分配AnyObject。