Question

I’ve been trying to set the background image of a rect button as a .png file I have on my web server. I’ve declared the button in the view controller .h and added this under .m viewdidload:

[mybutton setImage: [UIImage imageNamed: @"http://www.myserver.com/index_files/stacks_image_14.png"] forState: UIControlStateHighlighted];

but nothing shows in the button. I’ve been reading on NSSURL to see about calling in images before I try to assign them to objects, but I’m a little stuck at the moment.

Thanks for any help!

EDIT: New Code I’ve tried:

 NSURL *myurl2 = [NSURL URLWithString:@"http://www.myserver.com/bigoaks.png"];
    NSURLRequest *request2 = [NSURLRequest requestWithURL:myurl2
                                             cachePolicy:NSURLRequestReloadIgnoringLocalCacheData
                                         timeoutInterval:10.0];

    NSURLConnection *connection2= [[NSURLConnection alloc] initWithRequest:request2 
                                                                 delegate:self];
    NSString *mystring2 = [NSString stringWithContentsOfURL:myurl2 encoding:NSUTF8StringEncoding error:&error]; 
    [mybutton setImage : mystring2];

Still seem to get “No visible @interface for UIButton declares the selector ‘setImage:’

Thanks again for all the assistance!

EDIT 2:

Got it! Thanks for all of the help guys– here’s the final code to help any others:

NSURL *myurl2 = [NSURL URLWithString:@"http://www.myserver.com/bigoaks.png"];
UIImage *image = [UIImage imageWithData: [NSData dataWithContentsOfURL:myurl2]];
[mybutton setImage:image forState:UIControlStateNormal];

Using this tutorial: http://mobiledevelopertips.com/cocoa/download-and-create-an-image-from-a-url.html

Answer 1

NSURL *url = [NSURL URLWithString:@"http://www.myserver.com/image.png"];
NSData *data = [NSData dataWithContentsOfURL:url];
UIImage *image = [UIImage imageWithData:data];
[mybutton setImage:image];

Hope this is what you were looking for 🙂