Check JSON Response nil in swift

Irshad Published at Dev

Irshad

I am using swiftyjson for JSON Parsing.

My problem is when url is not valid or url is returns any error then app crash

here is code

      dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)) { () -> Void in

        let url = "https://www.googleapis.com/youtube/v3/playlistItems?part=snippet&maxResults=25&playlistId=\(self.playId)&key=AIzaSyB6LBckj5oqkbmroNPIhm7zru9vmsZR-w0"

        self.json = JSON(data: (NSData(contentsOfURL: (NSURL(string: url)!)))!, options: NSJSONReadingOptions.MutableContainers, error: nil) // App is crash on this line


 // END
        dispatch_async(dispatch_get_main_queue(), { () -> Void in
            self.tableView.reloadData()
        })

How to check url is valid or url is contain error

ridvankucuk

You should use try-catch something like this to prevent the crash:

    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)) { () -> Void in

        let url = "https://www.googleapis.com/youtube/v3/playlistItems?part=snippet&maxResults=25&playlistId=\(self.playId)&key=AIzaSyB6LBckj5oqkbmroNPIhm7zru9vmsZR-w0"

    if let JSONObject = try NSJSONSerialization.JSONObjectWithData((NSData(contentsOfURL: (NSURL(string: url)!)))?, options: .AllowFragments) as? [[String: AnyObject]],

    }    


 // END
        dispatch_async(dispatch_get_main_queue(), { () -> Void in
            self.tableView.reloadData()
        })

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