Features

• Drop-in image view replacement that loads from remote URLs asynchronously
• Support for image views created in interface builder
• Support for MIME type validation
• Optional delegate protocol for relaying image, errors, etc
• Shows activity indicatior during download
• Fully supports caching via NSURLConnection
• Well-documented code makes for easy extension
• Free!

Usage

The code is well-documented so you should be able to tell what's going on rather quickly. Here's how to implement the control:

1. Add the files under the component's source directory to your project.
2. Import the components header into your header or implementation.
3. Create an instance of JBAsyncImageView using the initializer.
4. That's it!

NSURL *urlToLoad = [NSURL URLWithString:@"http://f.cl.ly/items/3T0V0w0G3D0Q411k1p1n/congrats.png"];
JBAsyncImageView *asyncImageView = [[JBAsyncImageView alloc] initWithURL:urlToLoad];
[self.view addSubview:asyncImageView];

For those using interface builder, the technique is a bit simpler:

1. Create the image view in IB.
2. Set the class to JBAsyncImageView
3. In your view controller:

asyncImageView.imageURL = [NSURL URLWithString:@"http://f.cl.ly/items/3T0V0w0G3D0Q411k1p1n/congrats.png"];

Protocol Implementation

The JBAsyncImageViewDelegate protocol should be implemented to handle errors generated from the control. The following protocol definitions are available:

Called prior to beginning download of the image (optional)
-(void)imageView:(JBAsyncImageView *)sender willLoadImageFromURL:(NSURL *)urlToLoad;

Called when the download fails for various reasons (optional)
-(void)imageView:(JBAsyncImageView *)sender failedLoadingImageFromURL:(NSURL *)url withError:(NSError *)error;

Called once the download completes successfully (optional)
-(void)imageView:(JBAsyncImageView *)sender loadedImage:(UIImage *)imageLoaded fromURL:(NSURL *)url;

Example

A working example is provided in the project's source.

License

MIT/X11 Open Source License

Contributing

1. Fork it!
2. Make your changes in a new branch
3. Submit a pull request