ios - swift/parse getObjectInBackgroundWithId 查询不起作用

Question

我尝试使用 PFObject 的 getObjectInBackgroundWithId 方法，但它抛出此错误:

"Cannot invoke 'getObjectInBackgroundWithId' with an argument list of type (string, block: (PFObject!,NSError?) -> Void"

我编写了以下代码:

var result = PFQuery(className: "posts")
    result.getObjectInBackgroundWithId("kk", block: {
        (object: PFObject, error: NSError?) -> Void in
        object["pLikes"] = object["pLikes"] + 1

        object.save()
    })

有什么帮助吗？

Answer 1

您必须使用getObjectInBackgroundWithId 与

let query = PFQuery(className: "posts")
query.getObjectInBackgroundWithId("kk") { (objects, error) -> Void in

}

或者

let query = PFQuery(className: "posts")
query.getObjectInBackgroundWithId("kk") { (objects:PFObject?, error:NSError?) -> Void in

}

更改对象

let query = PFQuery(className: "posts")
query.getObjectInBackgroundWithId("kk") { (objects, error) -> Void in
    let testObj = objects?.first as! PFObject
    testObj.setObject(26, forKey: "pLikes")
    testObj.saveInBackgroundWithBlock { (succeeded, error) -> Void in
        if succeeded {
            println("Object Uploaded")
        } else {
            println("Error: \(error) \(error!.userInfo!)")
        }
    }
}