Question

I am creating a validate method for my application, hover I am having problems with the return value;

Incompatible block pointer type sending char …

-(BOOL)validateEmail{

    if (self.ownUser.emailUser != self.emailField) {
        [UserAPIClient validateEmail:self.emailField sucess:^(BOOL sucess, NSError *error) {
            if (sucess) {
                return YES;
            }else{
                NSLog(@"Can´t change e mail, already one is created in the database");
                return NO;
            }
        }];

    }else{
         return YES;
    }
}

Can anybody help me solve this?

Thanks in advance…

EDIT

I completily missed the right solution, just adopt my UserApiClient to return a BOOL

-(BOOL)validateEmail{

if (self.ownUser.emailUser != self.emailField) {

    return [UserAPIClient validateEmail:self.emailField];
}else{
    return YES;
}

}

EDIT 2
Know, i just realized, that i need the result of this method to make some changes after.
How can i change this method to an sync´s Method?

    [[MYApiClient sharedInstance] getPath:@"validateEmail" parameters:params
                                    success:^(AFHTTPRequestOperation *operation, id JSON) {

                                        NSLog(@"SUCESS %@", JSON);
                                    }
                                    failure:^(AFHTTPRequestOperation *operation, NSError *error) {

                                        NSLog(@"Error  %@", error);

                                    }];

Answer 1

If you want to use the value of sucess outside of the block, you have to copy it to a __block variable:

-(BOOL)validateEmail {

    if (self.ownUser.emailUser != self.emailField) {
        __block BOOL returnValue;

        [User validateEmail:self.emailField sucess:^(BOOL sucess, NSError *error) {
            if (sucess) {
                returnValue = YES;
            }else{
                NSLog(@"Can´t change e mail, already one is created in the database");
                returnValue = NO;
            }
        }];

        return returnValue;

    } else {
         return YES;
    }
}

The block itself (as I guess from the prototype) does not return a value.

Note that this will work only if [User validateEmail:sucess:] works synchronously, so that returnValue is defined when the function call returns.