使用Swift进行解析 - 用户查询

Question

Im trying to query my Parse User database in order to create a friend request between two users. The user inputs a user name that they want to add as a friend. However, when I try to query the database, I get a "EXC_BAD_ACCESS" error on the line where I am adding the condition. Not sure why Im getting this error, as its my understanding it has to do with trying to access memory already freed. Anything that you can do to help would be very appreciated!

    var friendship = PFObject(className: "Friends")
    var findUser:PFQuery = PFUser.query()

    findUser.whereKey("username",equalTo:username2) //program crashes here for some reason

    findUser.getFirstObjectInBackgroundWithBlock {

        (user2, error: NSError!) -> Void in
        if user2 == nil {
            println("Failure")
        } else {
            println("Successfully retrieved the object.")
            friendship["user1"] = PFUser.currentUser().objectId
            friendship["user2"] = user2.objectId
            friendship["pending"] = true
            friendship.save()
        }
    }

Answer 1

Set a breakpoint in the compiler and navigate the steps until you hit the crash so you can understand exactly at which point it crashes a troubleshoot further from there with the better understanding.

Also once it has crashed use LLDB print out po ivar to check if any of your ivars got instantiated and which ones are empty or execute dubious functions with exp func .

Answer 2

So... It works today. Not sure what happened. Co-Developer and I reorganized frameworks and everything works fine now. Thank you for your help everyone. I appreciate the responses :)