解析本地数据存储区：Swift中的Unpin对象似乎已被破坏

Question

I want to unpin a list of objects, which I had successfully locally stored earlier, and replace it with a new one. The code below should do that trick, but the locally pinned objects simply don't get updated. I tried everything including PFObject.unpin, nothing removes the old pinned objects except a complete reset of the simulator

func updateCountryList(server:Int, local:Int) {
    let query = VEPCountry.queryAll()
    query.findObjectsInBackgroundWithBlock {
        (objects: [AnyObject]!, error: NSError!) -> Void in
        if error != nil {
            // throw error
        } else {
            if local != 0 {
                VEPState.unpinAllObjectsWithName(String("countryListVersion\(local)"))
            }
            VEPState.pinAll(objects, withName: String("countryListVersion\(server)"))
            defaults.setObject(server, forKey: "localCountryListVersion")
        }
    }
}

Appreciate help or pointer to known issues around unpinning in Swift

Answer 1

I wonder if your unpin has't really finished, it's going off to the database after all.

Can you try:

query
  .findObjectsInBackground()
  .continueWithSuccessBlock({ (task: BFTask!) -> AnyObject! in
    // ...
    return VEPState.unpinAllObjectsWithNameInBackground("name"))
  })
  .continueWithSuccessBlock({ (task: BFTask!) -> AnyObject! in
    // ...
    return VEPState.pinAllInBackground(objects, withName: "name"))
  })

I may have the syntax a little off and the background method names not quite right. Also I'm using promises/tasks which is not a bad habit to get into.