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iossdwebimage

How to use options property with SDWebImagePrefetch?

This might be simple question to some, but I'm having trouble figuring out how to apply options property for SDWebImagePrefetcher

Thus far I set it up to fetch some urls with completion block

SDWebImagePrefetcher.shared.prefetchURLs(
        urls as [URL],
        progress: nil,
        completed: { finished, skipped in
          print("Finished")
        }
      )

I think options are set up like this? But I am not sure what needs to come instead of /* ? */ in order to enable one of the options SDWebImageCacheMemoryOnly

SDWebImagePrefetcher.shared.options = /* ? */
Solution

  • options is of type SDWebImageOptions, which is declared using the NS_OPTIONS macro. This means you can combine options using the bitwise or operator in Objective-C:

    SDWebImagePrefetcher.shared.options = SDWebImageRetryFailed | SDWebImageLowPriority; // etc

    Or like this in Swift:

    SDWebImagePrefetcher.shared.options = [.retryFailed, .lowPriority] // etc

    All the options can be found here: https://sdwebimage.github.io/Enums/SDWebImageOptions.html