Swift 2 refresh table view contents

Question

I have written a "refresh" method which should show new items in the table view but it doesn't seem to be reloading the cells properly.

func refresh(sender:AnyObject) {
    page = 1
    self.data_request()
}


func data_request(){
    let user_id = Data[0].valueForKey("user_id") as? String!

    let url:NSURL = NSURL(string: "http://..../perspective/\(user_id!)/page/"+"\(page)" )!

    let session = NSURLSession.sharedSession()
    self.page = self.page + 1


    let request = NSMutableURLRequest(URL: url)
    request.HTTPMethod = "GET"
    request.cachePolicy = NSURLRequestCachePolicy.ReloadIgnoringCacheData


    let task = session.dataTaskWithRequest(request) {
        (let data, let response, let error) in

        guard let _:NSData = data, let _:NSURLResponse = response  where error == nil else {
            print("error")
            return
        }

        var json: AnyObject?

        do {
            json = try NSJSONSerialization.JSONObjectWithData(data!, options: [])
        } 
        catch {
            return
        }

        guard let data_array = json as? NSArray else {
            return
        }

        for i in 0..<data_array.count
        {
            if let add = data_array[i] as? NSDictionary
            {   
                self.obj.append(Obj(data:add))
            }
        }

        dispatch_async(dispatch_get_main_queue(), { () -> Void in   
            self.tableView.reloadData()
        })
     }
    task.resume()  
}

It doesn't update the cells.

And it sticks like that, without loading the data

What dod you mean doesn't work? If `refresh()` called? Then `data_request()`? — Larme, Apr 25 '16 at 12:21
Why are u reloading table view in dispatch_async? Have u tried without it? — Jigar Tarsariya, Apr 25 '16 at 12:26
@tmac99 so what is your question? I think the best option would be to delete this question and think about what you actually want to ask. Include all information you know in the question. Take a look here http://stackoverflow.com/help/how-to-ask — Fogmeister, Apr 25 '16 at 12:40

score 0 · Accepted Answer · answered Apr 25 '16 at 12:35

0

Apply below code for reloading table view, i hope this will help u.

dispatch_sync(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0), { () -> Void in

      self.tableView.reloadData()                      
})

OR

dispatch_sync(dispatch_get_main_queue(), { () -> Void in   

      self.tableView.reloadData()
})

answered Apr 25 '16 at 12:35

Jigar Tarsariya

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I have already that in my data_request() ? – tmac99 Apr 25 '16 at 12:37
@tmac99 I think there is async method rather than sync. right? But have you tried this sync method? – Jigar Tarsariya Apr 25 '16 at 12:39
it sticks on the "pull to refresh" – tmac99 Apr 25 '16 at 12:43
ok then, are u getting data in table view initially? without using pull to refresh? – Jigar Tarsariya Apr 25 '16 at 12:44
yes I am getting the data without pull to refresh – tmac99 Apr 25 '16 at 12:45
OK, What happened if you are simply reloading table view without using async method? – Jigar Tarsariya Apr 25 '16 at 12:46
it sticks on the "pull to refresh" and doesn't load the new data – tmac99 Apr 25 '16 at 12:49
1

@tmac99 then you should have to check tableview delegate method by using break points and also check data_request() with break points. Traverse line by line then only u will get actual issue. – Jigar Tarsariya Apr 25 '16 at 12:56

Swift 2 refresh table view contents

1 Answers1