You can store the task in a variable so you can access it later:
NSURLSessionDataTask* task = [self GET:path parameters:nil success:^(NSURLSessionDataTask *task, id responseObject) {
completionBlock(responseObject);
} failure:^(NSURLSessionDataTask *task, NSError *error) {
errorBlock(error);
}];
Then simply cancel it with [task cancel]
.
Another way would be to save the task ID of the task and later ask the URL session for its tasks and identify the task you wish to cancel:
// save task ID
_savedTaskID = task.taskIdentifier;
// cancel specific task
for (NSURLSessionDataTask* task in [self dataTasks]) {
if (task.taskIdentifier == _savedTaskID) {
[task cancel];
}
}