SDWebImage/SDWebImageDownloader.m

67 lines
1.8 KiB
Objective-C

/*
* This file is part of the SDWebImage package.
* (c) Olivier Poitrey <rs@dailymotion.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
#import "SDWebImageDownloader.h"
static NSOperationQueue *downloadQueue;
@implementation SDWebImageDownloader
@synthesize url, delegate;
- (void)dealloc
{
[url release];
[super dealloc];
}
+ (id)downloaderWithURL:(NSURL *)url delegate:(id<SDWebImageDownloaderDelegate>)delegate
{
SDWebImageDownloader *downloader = [[[SDWebImageDownloader alloc] init] autorelease];
downloader.url = url;
downloader.delegate = delegate;
if (downloadQueue == nil)
{
downloadQueue = [[NSOperationQueue alloc] init];
downloadQueue.maxConcurrentOperationCount = 8;
}
[downloadQueue addOperation:downloader];
return downloader;
}
+ (void)setMaxConcurrentDownloads:(NSUInteger)max
{
if (downloadQueue == nil)
{
downloadQueue = [[NSOperationQueue alloc] init];
}
downloadQueue.maxConcurrentOperationCount = max;
}
- (void)main
{
NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
// In order to prevent from potential duplicate caching (NSURLCache + SDImageCache) we disable the cache for image requests
NSURLRequest *request = [NSURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadIgnoringLocalCacheData timeoutInterval:5];
UIImage *image = [UIImage imageWithData:[NSURLConnection sendSynchronousRequest:request returningResponse:nil error:NULL]];
if (!self.isCancelled && [delegate respondsToSelector:@selector(imageDownloader:didFinishWithImage:)])
{
[delegate performSelector:@selector(imageDownloader:didFinishWithImage:) withObject:self withObject:image];
}
[pool release];
}
@end