如何获得无字典密码的价值？ [英] How to obtain values without key of dictionary?

问题描述

var dictionary: Dictionary<String, AnyObject> = ["title" : "Berlin",
"description" : "Berlin square",
"createdBy": "Mathias",
"coordinates": ["fddfhsg": ["latitude": 56.34, "longitude": 53.44]]]

坐标]

我需要获取纬度和经度值，但我不键入（fddfhsg）字典。此键由Firebase数据库生成。

I need to obtain values latitude and longitude, but I don't key ("fddfhsg") of dictionary. This key is generates by Firebase database.

感谢您的帮助。

推荐答案

p>您可以在不知道此关键字的情况下获取这些值：将坐标转换为正确的字典类型，然后使用可选绑定和值属性。

You can get these values without knowing this key: cast "coordinates" to the right dictionary type then use optional binding and the values property.

示例：

if let dict = dictionary["coordinates"] as? [String:[String:Double]],
        content = dict.values.first,
        latitude = content["latitude"],
        longitude = content["longitude"] {
    print(latitude)
    print(longitude)
}

56.34

53.44

56.34
53.44

---

更新您的意见后：您现在需要做的是适应不同的字典结构。

---

As an update after your comments: all you need to do now is to adapt to different dictionary structures.

对于您的第二本字典，请查看其结构：

For your second dictionary, look how it is structured:

for (key, value) in dictionary2 {
    print(key)
    print(value)
    print("---")
}

您要查找的值不在与以前我们抓到的其他人相同的水平。

The values you're looking for are not at the same level than the other ones we grabbed previously.

调整我已经给出的解决方案：这只是字典中层次结构的问题。在 dictionary1 中，未知密钥位于坐标中，但这个密钥位于根级别。

Adapt the solution I've already given: it's only a matter of hierarchy in the dictionary. In dictionary1 the unknown key was in "coordinates", but this one is at the root level.

这篇关于如何获得无字典密码的价值？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！