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Introduction to dispatch_group
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| func asyncFunctionA(){ | |
| let urlRequest: NSURLRequest = ... | |
| let task = self.session?.dataTaskWithRequest(urlRequest, completionHandler: { | |
| (data:NSData?, response:NSURLResponse?, error:NSError?) in | |
| self.taskAComplete = true | |
| self.checkResults() | |
| }) | |
| } | |
| func asyncFunctionB(){ | |
| let urlRequest: NSURLRequest = ... | |
| let task = self.session?.dataTaskWithRequest(urlRequest, completionHandler: { | |
| (data:NSData?, response:NSURLResponse?, error:NSError?) in | |
| self.taskBComplete = true | |
| self.checkResults() | |
| }) | |
| } | |
| func checkResults(){ | |
| // Why does this function have to be called twice?! | |
| if taskAComplete && taskBComplete { | |
| //Handle Result | |
| } | |
| } |
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