This method is currently applicable only to URLs for file system If this method returns NO, the optional error is populated. Resource property is not available for the specified resource and noĮrrors occurred when determining the resource property was notĪvailable. This method returns YES and value is populated with nil, it means the Value varies by resource property (see resource key definitions). The backing store, adds the resource value to the URL object's cache,Īnd returns the resource value to the caller. Not, then this method synchronously obtains the resource value from If so, it returns the cached resource value to the caller. Method first checks if the URL object already caches the resource Returns the resource value identified by a given resource key. If you are using CFURL API, you must useĬFURLClearResourcePropert圜ache to clear cached resource values.
The client has complete control over the cache
The CFURL functions do not automatically clear any resource valuesĬached by the URL. (except those added as temporary properties) are invalidated the next When the NSURL methods which get, set, or use cached resource valuesĪre used from the main thread, resource values cached by the URL The behavior of resource value caching is slightly different between
#Daemon sync change login full#
Not mentioned anywhere in the main docs, but if you dive into NSURL.h, you find the following oddly phrased gem, which is worth reading in full to let the implications sink in: If you use NSURL's getResourceValue:forKey:error: method, which I guess you are because you mentioned using NSURLUbiquitousItemIsUploadedKey, you can see files apparently not uploading because NSURL caches the resource value under very particular circumstances. I know this is an old one, but I have been suffering this issue for a long time and have only just discovered why, so on the off chance someone else comes across this thread, here it is.
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