Question

我正在通过for循环查询进入名为“users”的数组的parse中的一些值。一旦值在数组中，我想在数组索引中提取单个值和部分。但是，我在做这件事时遇到了麻烦。这是我的代码：

  var query = PFQuery(className:"UserData")
    query.findObjectsInBackgroundWithBlock{
        (objects: [AnyObject]!, error: NSError!) -> Void in

        self.users.removeAll(keepCapacity: true)

        for object in objectss {

            var topUsers:PFObject = object as PFObject

            self.users.append("\(object)")


        }

        println(self.users[2])

我得到的输出是：

 <UserData: 0x7fa5a848f570, objectId: RlvK3GhfqE, localId: (null)> {
 hot = 59;
 imageNumber = 1;
 not = 17;
 totalVotes = 104;
 }
 <UserData: 0x7fa5a85cfdc0, objectId: 30WlVtgurP, localId: (null)> {
 hot = 13;
 imageNumber = 2;
 not = 24;
 totalVotes = 37;
 }
 <UserData: 0x7fa5a85d02f0, objectId: 5D6ARjk3xS, localId: (null)> {
 hot = 7;
 imageNumber = 3;
 not = 23;
 totalVotes = 31;
 }
 <UserData: 0x7fa5a85d02f0, objectId: 5D6ARjk3xS, localId: (null)> {
 hot = 7;
 imageNumber = 3;
 not = 23;
 totalVotes = 31;
 }

我如何提取：“热”及其自身的数值？或“不”或“totalVotes”？

提前多多感谢！

Answer 1

获取属性，但引用它的名称。你应该检查数组长度和空值，但一般来说：

self.users[2]["hot"]

此外，在您的find块中，您应该能够直接设置users数组，而无需遍历所有对象。

self.users = objects

从Parse查询的Xcode上的数组中提取单个值

1 个答案: