swift - 启动空的 Swift 字典数组

Question

我目前有这个:

var locations = [
    ["location": "New York", "temp": "2 °C", "wind": "3 m/s"]
]

然后我使用 locations.append() 添加内容。效果很好!

但是，我不希望有默认条目。所以我尝试了

var locations = [] // Not working.
var locations = [] as NSArray
var locations = [] as NSMutableArray
var locations = [] as NSDictionary
var locations = [] as NSMutableDictionary
var locations = [:] as ... everything
var locations = [APIData]

感觉我已经尝试了所有方法，但无论我尝试什么，我仍然会遇到无数错误。在这个阶段，我什至对我的默认位置能正常工作感到惊讶。

我该如何解决这个问题？如何让位置空着开始？

Answer 1

如果我们假设您尝试使用键 String 和值 String 初始化一个字典数组，您应该:

var locations: [[String: String]] = []

那么你可以这样做:

locations.append(["location": "New York", "temp": "2 °C", "wind": "3 m/s"])