CODEWITHSUNDEEP
iosafnetworking
Jonathan
Jonathan

Reputation: 2738

Cannot use Success and Failure block with UIImageView+AFNetworking.h

I am trying to add a Success and Error block to check when the image is loaded so that I can use NSCache to dynamically resize the image. But when I try

[scribbleImage setImageWithURL: [NSURL URLWithString:scribble[@"scribble_image"]] placeholderImage:[UIImage imageNamed:@"Default.png"] success:^(UIImage *image) {
NSLog(@"done");
} failure:^(NSError *error) {
NSLog(@"error %@",error);
}];

Xcode gives me an error, saying No visible @interface for 'UIImageView' declares the selector 'setImageWithURL:placeholderImage:success:failure:'

I am not sure why.

PS. I am importing UIImageView+AFNetworking.h and things work just fine without a success and failure block

Upvotes: 0

Views: 2697

Answers (1)

rckoenes
rckoenes

Reputation: 69469

This is because the there is no method setImageWithURL:placeholderImage:success:failure: there is just setImageWithURLRequest:placeholderImage:success:failure:

NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:scribble[@"scribble_image"]]];

[scribbleImage setImageWithURLRequest:request placeholderImage:[UIImage imageNamed:@"Default.png"] success:^(NSURLRequest *request, NSHTTPURLResponse *response, UIImage *image) {
    NSLog(@"Done");
} failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error) {
    NSLog(@"Failed with error: %@", error);
}];

If you look at what setImageWithURL:placeholderImage: does :

- (void)setImageWithURL:(NSURL *)url
       placeholderImage:(UIImage *)placeholderImage
{
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
    [request setHTTPShouldHandleCookies:NO];
    [request addValue:@"image/*" forHTTPHeaderField:@"Accept"];

    [self setImageWithURLRequest:request placeholderImage:placeholderImage success:nil failure:nil];
}

You see that this is the method is used to fetch the internally as well.

Upvotes: 2

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