在Swift中,要从Firestore检索数组,请使用:
In Swift, to retrieve an array from Firestore I use:
currentDocument.getDocument { (document, error) in if let document = document, document.exists { let people = document.data()!["people"] print(people!) } else { print("Document does not exist") } }我收到的数据看起来像这样
And I receive data that looks like this
( { name = "Bob"; age = 24; } )但是,如果我要单独检索名称,通常我会执行print(document.data()!["people"][0]["name"]).
However, if I were to retrieve the name alone, normally I'd do print(document.data()!["people"][0]["name"]).
但是我得到的响应是Value of type 'Any' has no subscripts
如何访问people数组中该对象内的名称键?
How do I access the name key inside that object inside the people array?
推荐答案document.data()!["people"]返回的值是Any类型,您无法访问Any上的[0].
The value returned by document.data()!["people"] is of type Any and you can't access [0] on Any.
您首先需要将结果转换为数组,然后获取第一项.虽然我不是Swift专家,但应该是这样的:
You'll first need to cast the result to an array, and then get the first item. While I'm not a Swift expert, it should be something like this:
let people = document.data()!["people"]! as [Any] print(people[0])更多推荐
如何在Swift中从Firestore获取对象数组?
发布评论