Update Prefetch Docs
Updated prefetchUrls: and prefetchUrls:progress:completed: documentation to mention that any already running prefetch operations are canceled if the operation is called.
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@ -78,7 +78,8 @@ typedef void(^SDWebImagePrefetcherCompletionBlock)(NSUInteger noOfFinishedUrls,
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/**
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* Assign list of URLs to let SDWebImagePrefetcher to queue the prefetching,
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* currently one image is downloaded at a time,
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* and skips images for failed downloads and proceed to the next image in the list
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* and skips images for failed downloads and proceed to the next image in the list.
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* Any previously-running prefetch operations are canceled.
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*
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* @param urls list of URLs to prefetch
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*/
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@ -87,7 +88,8 @@ typedef void(^SDWebImagePrefetcherCompletionBlock)(NSUInteger noOfFinishedUrls,
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/**
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* Assign list of URLs to let SDWebImagePrefetcher to queue the prefetching,
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* currently one image is downloaded at a time,
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* and skips images for failed downloads and proceed to the next image in the list
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* and skips images for failed downloads and proceed to the next image in the list.
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* Any previously-running prefetch operations are canceled.
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*
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* @param urls list of URLs to prefetch
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* @param progressBlock block to be called when progress updates;
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