startInstanceのLambdaを起動させるobjective-cのコード

amimotoviewcontroller.m

- (IBAction)startInstance:(id)sender {
    LAContext *myContext = [[LAContext alloc] init];
    NSError *error = nil;

    // 端末が指紋認証を使えるかどうか判定
    if([myContext canEvaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics error:&error]) {
        NSString *myLocalizedReasonString = @"指紋認証せんかい！";
        [self.activityIndicator startAnimating];
        // 指紋認証画面を表示
        [myContext evaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics
                  localizedReason:myLocalizedReasonString
                            reply:^(BOOL success, NSError *error) {

                                if(success) {

                                    // 指紋認証成功
                                    NSString *functionName = @"start-instance";

                                    NSLog(@"Function Name: %@", functionName);

                                    NSError *jsonError = nil;
                                    NSString *jsonInput = [NSString stringWithFormat:@"{\"instance_id\":\"%@\"}", self.instanceId];
                                    NSData *jsonData = [jsonInput dataUsingEncoding:NSUTF8StringEncoding];
                                    NSDictionary *parameters = [NSJSONSerialization JSONObjectWithData:jsonData
                                                                                               options:NSJSONReadingAllowFragments
                                                                                                 error:&jsonError];
                                    NSLog(@"Json Input: %@", jsonInput);

                                    [[AWSCloudLogic sharedInstance] invokeFunction:functionName withParameters:parameters
                                                               withCompletionBlock:^(id result, NSError *error) {
                                                                   dispatch_async(dispatch_get_main_queue(), ^{
                                                                       [self.activityIndicator stopAnimating];
                                                                       if (error != nil) {

                                                                           UIAlertView *alert =
                                                                           [[UIAlertView alloc] initWithTitle:@"Error" message:[error localizedDescription] delegate:nil cancelButtonTitle:@"DISMISS" otherButtonTitles:nil];
                                                                           [alert show];
                                                                       } else {
                                                                           self.instanceStatusLabel.text = @"インスタンスステータス：running";
                                                                           self.instanceStatus = @"running";
                                                                       }
                                                                   });
                                                               }];
                                } else {
                                    [self.activityIndicator stopAnimating];
                                }
                            }];
    } else {
        // 指紋認証を使えない端末の処理
        // 指紋認証を使える端末だが、ユーザーが指紋認証機能をオフにしているケースの処理

    }
}