This is a NSURLCache subclass for handeling all web requests that use NSURLRequest. (This includes UIWebView)
The EVURLCache is meant for handeling the following caching strategy:
- The app has to be functional even if there is no internet connection right after the app has been downloaden from the app store. This means that the required content is included in the app.
- You do want to be a able to download new/updated content if it's available.
Include the EVURLCache.m and .h and the Reachability .m and .h files in your project Add the following import to your AppDelegate.m : #import "EVURLCache.h" Add the following line to the AppDelegate didFinishLaunchingWithOptions : [EVURLCache activate];
Since all files will be cached, you do not have to handle incoming data yourself. You can do a NSURLRequest and then in the connectionDidFinishLoading you can use the file from the cache. You can get the full path of that file by calling: [EVURLCache storagePathForRequest:theRequest]
Put all the files that you want to be available from the start in the folder /PreCache The easiest way to add this to your project is to select 'add files' and then select the folder and select 'create folder reference for any added folders'
If you are not sure what files you would need to include in the PreCache folder, then just run your app with the EVURLCache enabled in the simulator and execute all the functions that needs to be functional without an internet connection. Then browse to the files (see ~/Library/Application Support/iPhone Simulator/ ...) The downloaded files will be in the Documents/Cache folder. You can copy these files to the PreCache folder
This cache should work with all download libraries that use a NSURLRequest for downloading from the web (Like AFNetworking). It also works for every request in a UIWebview.
Downloaded files will be completely in memory before they are written to disk. Because of this large files will not be cached. The maximum file size can be influenced by setting the MAX_FILE_SIZE in the EVURLCache.h
Ideas for people who might want to hack on this:
- Use the default caching for requests that come from an other domain. See the TODO in the EVURLCache.m
- Adding a sample app.
- anything else?
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Copyright (c) 2013 EVICT B.V.
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