Mike Clark http://en.oreilly.com/rails2010/public/schedule/detail/14136 This is going to be mostly an iPhone application development session, not Rails. Demo app is performs CRUD operations on a Rails 3 site from an iPhone app http://github.com/clarkware/iphone-rails-tutorial Basic Railsy JSON controller methods Standard iPhone callback methods: applicationWillTerminate, didFinishLaunchingWithOptions in .h file - create instance variables in the @interface and add: @property(nonatomic, retain) NSMutableArray *goals; in .m use: @synthesize goals (initializes instance variable), also release in dealloc() viewDidLoad - called when the view is loaded reference “goals” with “self.goals” to access variable through property “Do not fear the square brackets” cellForRowAtIndexPath - don’t delete what’s there (that’s what makes scrolling through large list fast), just add your own logic to the end of the method, before “return cell”; commitEditingStyle - delete from our array - allows deletion in app. Restart app to get data back (since it’s in memory) StringWithContentsOfURL - fetch URL synchronously (blocks main UI thread) json-framework is a strict JSON parser and generator return NSDictionary or NSArray of NSDictionaries refreshButton - “action:@selector(refresh)” – is like using “send” in ruby. target:self” means that self.refresh will be called on click networkActivityIndicatorVisible - network spinner NSURLRequest, NSURLConnection, sendSynchronousRequest Shift - Apple - R brings up debug console in Xcode After break - Asynchronous Networking, Authentication, Error handling …. Async Networking - done with the Delegate pattern - http://en.wikipedia.org/wiki/Delegation_pattern Use an OperationQueue to background work - NSOperationQueue, NSInvocationOperation - don’t use NSThread Always update the UI on the main thread - performSelectorMainThread HTTPRiot is a simple REST library that makes it easy to interact with RESTful resources (inspired by httparty) - responses converted to NSDictionary and NSArray objects. http://allseeing-i.com/ASIHTTPRequest/ - flexible, low-level library with tons of features - File uploads, post form-encoded data, basic authentication, progress indictors, etc. Not REST specific, doesn’t handle json/xml by default, but very useful for low-level stuff ObjectiveResource is an Objective-C port of ActiveResource - Automatically serializes/deserializes objects (to/from JSON or XML) - Assumes Rails RESTful conventions - adds methods to NSObject didFinishLaunchWithOptions - only gets called once - when app starts up ObjectiveResource needs the following to give json a default root object: ActiveRecord::Base.include_root_in_json = true