在字典中访问字典 [英] Access a dictionary in dictionary

问题描述

我有一个包含另一个字典的字典：

I have a dictionary which contains another dictionary:

var channelDict = Dictionary<String, AnyObject>()
channelDict["image"] = Dictionary<String, AnyObject>()

现在我要添加值得注意的是，我尝试过以下操作，但没有任何工作：

Now I want to add value to the child dictionary, I tried the following but nothing worked:

channelDict["image"]["key"] = "value"

var:Dictionary<String, AnyObject> dict = channelDict["image"]
dict["key"] = "value"

if var dict = channelDict["image"] {
       dict["Key"] = "value"
}

推荐答案

您可以添加一个字典到image键：

This way you can add a dictionary to the "image" key:

channelDict["image"] = ["key": "value"]

UPDATED

如果要向内部dict添加值并保留现有值，则应创建一个临时变量：

And if you want to add values to the inner dict and keep the existing values, you should create a temporary variable like this:

var innerDict = channelDict["image"] as [String: AnyObject]

innerDict["dsa"] = "dsa"

channelDict["image"] = innerDict

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