ios swift parse: How to handle error codes

Question

While on a signup process, the user can cause several errors like Username already taken, invalid email address etc...

Parse returns within the error object all needed infos see http://parse.com/docs/dotnet/api/html/T_Parse_ParseException_ErrorCode.htm

What I can't find out is how to use them eg how to access them in order to write a switch to catch all possibilities:

                user.signUpInBackgroundWithBlock {
                    (succeeded: Bool!, error: NSError!) -> Void in
                    if error == nil {
                        // Hooray! Let them use the app now.
                        self.updateLabel("Erfolgreich registriert")
                    } else {
                        println(error.userInfo)
                    }
                }

What can I do to switch through the possible error code numbers? Please advice Thanks!

Christian · Accepted Answer · 2016-01-29 15:16:50Z

8

An NSError also has a property called code. That code contains the error-code you need. So you can make a switch-statement with that code:

user.signUpInBackgroundWithBlock {
    (succeeded: Bool!, error: NSError!) -> Void in
    if error == nil {
        // Hooray! Let them use the app now.
        self.updateLabel("Erfolgreich registriert")
    } else {
        println(error.userInfo)
        var errorCode = error.code

        switch errorCode {
        case 100:
            println("ConnectionFailed")
            break
        case 101:
            println("ObjectNotFound")
            break
        default:
            break
        }
    }
}

edited Jan 29, 2016 at 15:16

answered Feb 19, 2015 at 13:07

Christian

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2 Comments

Takeshi Kaga Over a year ago

Is there any way to use the constants? I really don't like hard-coding values...

mbo42 Over a year ago

@TakeshiKaga Yes you can, for instance: case NSURLErrorCannotConnectToHost:

Jeremy Piednoel · Accepted Answer · 2017-04-27 13:03:10Z

2

Hi i would do something like

if let error = error,let code = PFErrorCode(rawValue: error._code) {
    switch code {
    case .errorConnectionFailed:
        print("errorConnectionFailed")
    case .errorObjectNotFound:
        print("errorObjectNotFound")
    default:
        break
    }
}

You have the whole errors list there : https://github.com/parse-community/Parse-SDK-iOS-OSX/blob/master/Parse/PFConstants.h#L128

answered Apr 27, 2017 at 13:03

Jeremy Piednoel

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Comments

Simankov · Accepted Answer · 2015-11-14 14:37:45Z

0

You can also use PFErrorCode:

user.signUpInBackgroundWithBlock {
    (succeeded: Bool!, error: NSError!) -> Void in
    if error == nil {
        // Hooray! Let them use the app now.
        self.updateLabel("Erfolgreich registriert")
    } else {
        println(error.userInfo)
        var errorCode = error!.code

        switch errorCode {
           case PFErrorCode.ErrorConnectionFailed.rawValue:
              println("ConnectionFailed")
           case PFErrorCode.ErrorObjectNotFound.rawValue:
              println("ObjectNotFound")
           default:
              break
        }
    }
}

edited Nov 14, 2015 at 14:37

answered Nov 14, 2015 at 13:43

Simankov

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