如何在Swift中将completionHandler Closure与Return结合使用？

如何在Swift中将completionHandler Closure与Return结合使用？

func getSomething(callback: (Array<AnyObject>) -> ()) {    var dataTask = NSURLSessionDataTask()    dataTask = session.dataTaskWithRequest(request) { (data, response, error) in        if (error == nil) { var callbackArray = Array<MyObject>() let responseDict = NSJSONSerialization.JSonObjectWithData(data, options: .MutableContainers, error: nil) as NSDictionary let response = responseDict.objectForKey("response_key") as NSDictionary let array = response.objectForKey("array_key") as NSArray for item: AnyObject in array {     var arrayItem = MyObject(dict: item as NSDictionary)     callbackArray.append(arrayItem) } callback(callbackArray)        } else { // handle an error        }    }    dataTask.resume()}

然后，您可以执行以下 *** 作：

getSomething() { (response) in    if let responseArray = response as? Array<MyObject> {        self.somethings = responseArray    }}