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POiOS MKNetworkOperation - how to retry the last operation?
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copied!<p>I am trying to implement a refresh-function. I have multiple types of operations populating my tableview, and I simply want to re-run the last operation.</p> <p>I have this property:</p> <pre><code> @property (nonatomic, strong) GetRouteOperation* refreshOperation; </code></pre> <p>Where the RouteOperation inherits from MKNetworkOperation, and it is a superclass of different types of RouteOperations, for example "Get routes in radius", "Get routes by cities", etc.</p> <p>Im initializing the operation like this:</p> <pre><code>GetRoutesWithinDistanceOperation *operation = [[GetRoutesWithinDistanceOperation alloc] initOperation]; [self refreshRoutesWithOperation:operation]; </code></pre> <p>Im running the operation like this:</p> <pre><code>- (void)refreshRoutesWithOperation:(GetRouteOperation *)operation { self.refreshOperation = [operation copyForRetry]; [operation getRoutesCompletionHandler:^(NSArray *routes) { self.routes = routes; [self.tableView reloadData]; } errorHandler:^(NSError *error) { } notModifiedHandler:^{ }]; } </code></pre> <p>and it works the first time I fetch my data.</p> <p>When I try to refresh the table like this:</p> <pre><code> [self refreshRoutesWithOperation:self.refreshOperation]; </code></pre> <p>I get an exception in this method for the MKNetworkOperation-class:</p> <pre><code>-(void) addCompletionHandler:(MKNKResponseBlock)response errorHandler:(MKNKResponseErrorBlock)error { if(response) [self.responseBlocks addObject:[response copy]]; if(error) [self.errorBlocksType2 addObject:[error copy]]; } </code></pre> <p>this is the exception:</p> <pre><code>2013-08-30 14:00:32.211 AppName[3500:a0b] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSArrayI addObject:]: unrecognized selector sent to instance 0x9960540' </code></pre> <p>Why?! Why can't I simply run the copied operation like the first time.</p> <p>EDIT:</p> <p>It seems as if the actual copyForRetry doesn't work for me. Or I am using it in a wrong way.</p> <p>Even if I try to use the copied object directly after copying it, It crashes. This does not work; I get the same exception:</p> <pre><code>self.refreshOperation = [operation copyForRetry]; [self.refreshOperation getRoutesCompletionHandler:^(NSArray *routes) { ... } </code></pre> <p>Anyone got a good solution for this? How to store the last operation for refreshing purposes?</p> <p>Edit2: I try to use the NSObject method copy aswell, but still get the same problem. I guess there's something I'm missing with the copy-methods.</p> <p>However I do not need to use this approach for a solution, I just need a smooth solution. Any ideas?</p>

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