How to check if UIImage loaded from a URL is valid

Question

Is there a way I can check if there is valid image in the NSData I've loaded into my UIImage object?

The UIImage is loading in from NSData dataWithContentsOfURL:

UIImage *image = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:MyURL]]];

Thanks

did you ever get an answer to this ? It would be helpful to the rest of us. — Dobler, Oct 13 '12 at 00:56
Check answer here: http://stackoverflow.com/questions/11072613/how-to-check-if-a-nsdata-is-valid-for-usage-in-uiimage — cynistersix, Feb 19 '15 at 22:05

score 2 · Answer 1 · edited May 23 '17 at 12:12

2

see here.
Check if NSURL returns 404
using NSURLConnection you can get the statuscode

edited May 23 '17 at 12:12

Community

answered Jan 24 '12 at 05:17

Jason Bugs Adams

score 0 · Answer 2 · answered Aug 03 '10 at 22:31

0

It depends on what you mean by a valid image. If you do

[UIImage imageNamed:]

and the image isn't valid, it will return nil, so you can do:

UIImage *myImage = [UIImage imageNamed:@"yourImageName.png"]

if (myImage != nil) { ... }

answered Aug 03 '10 at 22:31

Zeppomedio

Sorry Mike I haven't made my question quite clear. I am initializing an image with a URLString. In my case sometimes there would be an image on remote site and sometimes not. I have read the data by converting it into string and it says in title '404 Not Found'. I have also tried using NSPredicate to see if return string contains '404 Not Found' in it so I can put in place proper validation but it is not working. I would really appreciate if someone could help me in right direction. Thanks – Leo Aug 04 '10 at 07:23

2 Answers2