试图访问一个SWIFT分析查询数组的下标 [英] trying to access the subscript of a Parse query array in SWIFT

问题描述

我有困难访问标在对象的数组已经从分析数据库中查询点零。 code：

I am having difficulty accessing the subscript at point zero of an array of objects that has been queried from Parses database. Code:

 var query = PFUser.query()
    query.whereKey("location", nearGeoPoint: geopoint, withinMiles: self.distance)
    query.whereKey("objectId", notContainedIn: self.matches)
    query.whereKey("objectId", notEqualTo: self.user.objectId)
    query.limit = 500
    var objects = query.findObjects()
    if objects != nil {
      for object in objects {

            var closestUsers = object as PFUser
            var closestUser = closestUsers[0] //COMPILER ERROR: Type 'String!' does not conform to protocol 'IntegerLiteralConvertible'
    }

如图中code我得到一个编译器错误，指出：'串'类型不符合协议IntegerLiteralConvertible'`我不能工作了，为什么它不工作？

As shown in the code I am getting a compiler error stating: Type 'String!' does not conform to protocol 'IntegerLiteralConvertible'` I can't work out why It is not working?

先谢谢了。

推荐答案

我觉得很难理解你code的意思做，但在猜测...

I find it hard to understand what your code is meant to do, but at a guess...

尝试：

var query = PFUser.query()
query.whereKey("location", nearGeoPoint: geopoint, withinMiles: self.distance)
query.whereKey("objectId", notContainedIn: self.matches)
query.whereKey("objectId", notEqualTo: self.user.objectId)
query.limit = 500
var users = query.findObjects() as [PFUser]
var closestUser = users.firstObject

在您的code

var objects = query.findObjects() // Get response
if objects != nil { // Check if it is nil
  for object in objects { // Iterate over the objects

        var closestUsers = object as PFUser // Get the current user object (I presume here you want an array of users?)
        var closestUser = closestUsers[0] // Get the first user?
}

的 VAR closestUsers =对象PFUser 并没有得到用户的阵列，而是当前的用户对象。

The var closestUsers = object as PFUser doesn't get the array of users but instead the current user object.

我presume你想从数组的第一个用户对象。在这种情况下，你可以抓住从原数组的第一个对象，而无需遍历它。

I presume you want the first user object from the array. In which case you can just grab the first object from the original array without iterating over it.

VAR用户=（query.findObjects（）作为？[PFUser]）？firstObject

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