#Foursquare API 2.0 For iOS and MacOS

###Features

• In-App Authentication
• Asynchronous requests with blocks
• Build-in image uploader for photos.
  • You can use CFAsyncImageView for downloading images.
• Made with native framworks:
  • NSJSONSerialization for JSON parsing
  • NSURLConnection for requests

###How To

1. Create Your application here https://foursquare.com/developers/register

2. Setup Foursquare to use your credentials

    - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
   
        [Foursquare2 setupFoursquareWithKey:YOUR_KEY
                                     secret:YOUR_SECRET
                                callbackURL:YOUR_CALLBACK_URL];
    }
   

3. You need to make sure you set up the URL scheme in your info.plist properly

CFBundleURLTypes -> CFBundleURLName -> CFBundleURLSchemes -> {app_id}

###Usefull tips

1. How to get sw and ne from MKMapView?

    CGPoint swPoint = CGPointMake(mapView.bounds.origin.x, mapView.bounds.origin.y+ mapView.bounds.size.height);
    CGPoint nePoint = CGPointMake((mapView.bounds.origin.x + mapView.bounds.size.width), (mapView.bounds.origin.y));
   
    //Then transform those point into lat,lng values
    CLLocationCoordinate2D swCoord;
    swCoord = [mapView convertPoint:swPoint toCoordinateFromView:mapView];
   
    CLLocationCoordinate2D neCoord;
    neCoord = [mapView convertPoint:nePoint toCoordinateFromView:mapView];
   

###Screnshots

##My other usefull libs CFAsyncImageView - is simple subclass of UIImageView for async downloading image. Very simple and powerfull. No extra code. I use native NSCache class for in-memory image caching.

I got blue pin here.