Block based method with completion and fail

#pragma mark - NetworkHelper.h

- (void)getHotspotNameWithCompletion:(void (^)(void))completionBlock  andFail:(void (^)(void))failBlock;

#pragma mark - NetworkHelper.m

- (void)getHotspotNameWithCompletion:(void (^)(void))completionBlock andFail:(void (^)(void))failBlock
{
    
    dispatch_async(queue, ^{
    
    localIPAddress = [self localWiFiIPAddress];
    
#if TARGET_IPHONE_SIMULATOR
    
    hotSpotName = @"SIMULATOR";
    
#else // TARGET_IPHONE_SIMULATOR
    CFArrayRef interfaces = CNCopySupportedInterfaces();
    CFIndex count = CFArrayGetCount(interfaces);
    
    for (int i = 0; i < count; i++) {
        CFStringRef interface = CFArrayGetValueAtIndex(interfaces, i);
        CFDictionaryRef netinfo = CNCopyCurrentNetworkInfo(interface);
        if (netinfo && CFDictionaryContainsKey(netinfo, kCNNetworkInfoKeySSID)) {
            hotSpotName = (__bridge NSString *)CFDictionaryGetValue(netinfo, kCNNetworkInfoKeySSID);
            
        }
        if (netinfo)
            CFRelease(netinfo);
    }
    CFRelease(interfaces);
        
//Delay for TEST
    BOOL stop = NO;
    while (!stop) {
        [NSThread sleepForTimeInterval:1];
        
        stop = YES;
    }
//
#endif
        dispatch_async(dispatch_get_main_queue(), ^{
            
            if(hotSpotName && localIPAddress){
                completionBlock();
            }else{
                failBlock();
            }
            
		});
        
    });
}


#pragma mark - Call
    [[NetworkHelper shared] getHotspotNameWithCompletion:^{
        [self.hotSpotNameLabel setText:[[NetworkHelper shared] hotSpotName]];
        [self.localIPLabel setText:[[NetworkHelper shared] localIPAddress]];
    } andFail:^{
        [self.hotSpotNameLabel setText:@"Check Wi-Fi"];
        [self.localIPLabel setText:@"..."];
    }];