Swift:解析服务器检索数据范围 10...20

Question

我想按范围从数据库中检索数据，即我想检索例如第 5 个和第 20 个对象之间的数据，如何做:

我正在寻找一个如下所示的函数:

let query = PFQuery(className: "Post")
    query.order(byDescending: "createdAt")
    query.range(range: 5..<20) //I want this, how to do??
    query.limit = 5

Answer 1

您可以结合使用 limit 和 skip 来实现这一点:

https://docs.parseplatform.org/ios/guide/#query-constraints

let query = PFQuery(className: "Post")
query.order(byDescending: "createdAt")
query.skip = 5
query.limit = 20 - 5 // 15 objects