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从parse.com检索信息时无法调用非函数类型[PFObject]的值

pfobject parse-platform swift

0

Enrique · 技术社区 · 7 年前

func queryDownload (user : PFUser) {

    let objects: [PFObject]
    let query = PFQuery(className: "Gluc")
    query.whereKey("user", equalTo: user)
    do {
        objects = try query.findObjects() as [PFObject]

    } catch {
        print("ERROR")

    }
    let returnedObjects = objects {
        let elements = self.returnedObjects.count
        for i in 0...elements-1 {
            self.dataArray.append(MyData(gluc: Int(self.returnedObjects[i]["meassure"] as! String)!, fec: self.returnedObjects[i]["fec"] as! Date, alimento: self.returnedObjects[i]["alim"] as! Int, comentarios: self.returnedObjects[i]["notes"] as! String))

        }
    }

    self.dataArrayOrdered = self.dataArray.sorted(by: { $0.fec.compare($1.fec) == .orderedAscending})

    print(self.dataArrayOrdered)
}

但我不能运行它,因为在这行中:

let returnedObjects = objects {

它表示“无法调用非函数类型[PFObject]的值”

1 回复 | 直到 7 年前

1

0

vadian 7 年前

let returnedObjects = objects { ... }

是语法错误,您可能想 可选绑定

if let returnedObjects = objects { ... }

但是 objects 是非可选的,不可能进行可选绑定。

只需将值赋给变量并删除大括号

do {
    let objects = try query.findObjects() as [PFObject]
    let returnedObjects = objects
    let elements = self.returnedObjects.count
    for i in 0...elements-1 {
        self.dataArray.append(MyData(gluc: Int(self.returnedObjects[i]["meassure"] as! String)!, fec: self.returnedObjects[i]["fec"] as! Date, alimento: self.returnedObjects[i]["alim"] as! Int, comentarios: self.returnedObjects[i]["notes"] as! String))
    }
    self.dataArrayOrdered = self.dataArray.sorted(by: { $0.fec.compare($1.fec) == .orderedAscending})
    print(self.dataArrayOrdered)
} catch {
    print("ERROR", error)
}

好的中的代码 do "ERROR"

map 作用

do {
    let objects = try query.findObjects() as [PFObject]
    self.dataArray = objects.map { MyData(gluc: Int($0["meassure"] as! String)!, fec: $0["fec"] as! Date, alimento: $0["alim"] as! Int, comentarios: $0["notes"] as! String) }
    self.dataArrayOrdered = self.dataArray.sorted(by: { $0.fec.compare($1.fec) == .orderedAscending})
    print(self.dataArrayOrdered)
} catch {
    print("ERROR", error)
}