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POWhy won't this loop exit
 

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  1. POWhy won't this loop exit
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    <p>My assumption is that the <code>operation</code>s are running asynchronously on a separate thread, but the loop never exits, so something is not as I assumed.</p> <pre><code>/** Checks if we can communicate with the APIs @result YES if the network is available and all of the registered APIs are responsive */ - (BOOL)apisAvailable { // Check network reachability if (!_connectionAvailable) { return NO; } // Check API server response NSMutableSet *activeOperations = [[NSMutableSet alloc] init]; __block NSInteger successfulRequests = 0; __block NSInteger failedRequests = 0; for (AFHTTPClient *httpClient in _httpClients) { // Send heart beat request NSMutableURLRequest *request = [httpClient requestWithMethod:@"GET" path:@"" parameters:nil]; AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request]; [operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) { // Server returned good response successfulRequests += 1; } failure:^(AFHTTPRequestOperation *operation, NSError *error) { // Server returned bad response failedRequests += 1; }]; [operation start]; [activeOperations addObject:operation]; } // Wait for heart beat requests to finish while (_httpClients.count &gt; (successfulRequests + failedRequests)) { // Wait for each operation to finish, one at a time //usleep(150); [NSThread sleepForTimeInterval:0.150]; } // Check final results if (failedRequests &gt; 0) { return NO; } return YES; } </code></pre>
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    1. COanswered my question, but I'll wait for more feedback before I answer it.
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