How to handle error 'NSInvalidArgumentException', reason: 'data parameter is nil' when no internet connection?

Question

i am doing a asynchronous request, and I'm wondering if there is no internet on the iPhone how would i handle it instead of the app just crashing.

Error: 'NSInvalidArgumentException', reason: 'data parameter is nil'

Do null check in response and use Reachability class for checking internet connection. — Daljeet, Feb 22 '16 at 09:27
if(dataParemeters isKindOfclass NSNull){}else{do your things here} — Daljeet, Feb 22 '16 at 09:47
@Daljeet surely a simple test for `nil` is what is required, not NSNull. — Paulw11, Feb 22 '16 at 09:48
@Paulw11 as there is no code i'm just referring that need to do null check. — Daljeet, Feb 22 '16 at 09:56
http://stackoverflow.com/questions/21311760/fhstwitterengine-nsinvalidargumentexception-data-parameter-is-nil — Daljeet, Feb 22 '16 at 10:01

score 0 · Answer 1 · answered Feb 22 '16 at 10:00

0

I would suggest you to check your internet connection before making request to server for data. You can user Reachability class to ensure the same.

answered Feb 22 '16 at 10:00

Devang Tandel

i heard if i use Reachability Apple would reject my ios app? – farhan Feb 22 '16 at 20:14

Vinay Jain · Answer 2 · 2016-02-22T13:03:42.073

You can handle it by performing various pre-cautious things as follows:

Check for the internet connection, in case making a call to server. But it will not save you in all conditions, as there might be an issues on the server side due to server errors or coding errors.
You can check for NULL at places where you can expect NULL data and handle it.
I am giving you my sample MACRO, i am using frequently to avoid crashes due to NULL values.

#define VALIDATE_NULL(str) ([str length] > 0) ? str : @""

You can use this macro freely anywhere on NSString values. Enjoy. :)

2 Answers2