iOS7 Series –Custom Transitions There is a hierarchy of actors you need to visualize here. It goes a little something like: A TransitioningDelegate An AnimatedTransitioning A ContextTransitioning The VC you start out with and that will call the transition will adopt the first protocol, the TransitioningDelegate Protocol. The purpose of doing so is to obtain the authority to manage the entire transition process. You will then create a Transitioning class which we can call the Transition Manager. This class will adopt the AnimatedTransitioning protocol. The purpose of this protocol is to animate the transition. The Transition Manager class receives all the necessary information from the Transitioning Context (a protocol adopted… Read More
Continue ReadingCreating a Menu in SpriteKit
Cocos2d has a easy to use CCMenu object to which you add CCMenuItems. In SpriteKit however, you are back to UIKit objects. This doesn’t not mean its more complicated, its just different :-). You will need to create a UIControl such as a button or you can use SpriteKit’s SKNode to create the visual object onscreen: SKLabelNode* someNode = [SKLabelNode labelNodeWithFontNamed:@”Chalkduster”]; [someNode setText:@”Play Game”]; [someNode setPosition:CGPointMake(CGRectGetMidX(self.frame)+5,CGRectGetMidY(self.frame)-40)]; [self addChild: someNode]; Now you simply connect the object action to some event like so: for (UITouch *touch in touches) { CGPoint location = [touch locationInNode:self]; if ([someNode containsPoint:location]) { SKTransition* present = [SKTransition revealWithDirection:SKTransitionDirectionDown duration:1]; GameScene* gameScene = [[GameScene alloc] initWithSize:CGSizeMake(1024, 768)]; [self.scene.view… Read More
Continue ReadingCreating a simple UICollectionView in iOS
Steps 1) Create Master-Detail Application & Replace the MasterViewController First we want to create a Master-Detail Application just because it sets up a Master-Detail relationship even though thats the first thing we are going to break :). So go ahead and create a new project in XCode4 based on a Master-Detail Application type. Use ARC, Storyboards and CoreData because we will use CoreData to store information. Your storyboard should look like this: Now select the Master scene until its highlighted in blue and delete it with the Delete key. We simply replace it by dragging in a UICollectionViewController onto the storyboard in its place. This places a UICollectionViewController scene with… Read More
Continue ReadingiOS7 – UIKit Dynamics
iOS7 Series – UIKit Dynamics Incorporating UIKitDynamics into your app is pretty simple! The great thing about it is that you really get the most bang for your buck because the end result has a really big WOW Factor which is certain to impress your users. Let’s take a quick conceptual drive around UIKitDynamics. First we adopt the protocol into the ViewController which will implement UIKitDynamics, why? Well because the objects which will be animated in the end will have to send back a lot of signals like “Hey, I collided with a boundary” or “hey I just hit somebody else and I was going this fast, in this… Read More
Continue ReadingiOS Smarties :)
Everyone loves Smarties! And much the same way Smarties Candies make you smarter… today we are talking about Code Snippets that make you….er Smarter! More than a source of cut/paste Objective C source code, this is meant to be a quick reference. As such, some of these will be incomplete and I will be filling them up as I go along. 1) UIAlertView UIAlertView *internetAlert = [[UIAlertView alloc] initWithTitle:@”No hay farmacias” message:@”Favor cambie sus parámetros” delegate:self cancelButtonTitle:@”Cancelar” otherButtonTitles:@”Ok”, nil]; [internetAlert show]; 2) NSNotification //1. Register as observer of notifications in viewDidLoad [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(receiveTestNotification:) name:@”TestNotification” object:nil]; //2. NSNotifCtr CLEANUP in viewDidUnload [[NSNotificationCenter defaultCenter] removeObserver:self]; //4. Post notif to NSNotif in… Read More
Continue ReadingiOS7 Sprite Kit for Game Design for iPhone & iPad
iOS 7 Series – Sprite Kit Welcome to iOS7 and to start off, I want to kick things off with SpriteKit. Although it deals with video games, many companies are using iOS apps as a marketing tactic to engage their users in an effort to promote their products. SpriteKit is the most prominent feature in iOS7 so we’re going to take a quick tour. Go ahead and create a New Project in XCode5 and select the SpriteKit template (the bottom right icon): Click next and fill in your project data. Once you are in the main XCode window notice we have the following files in the Project Navigator: 1) AppDelegate… Read More
Continue ReadingStatic Libraries in iOS – Video Tutorial
Libraries is another one of those rather obscure topics for newbie programmers, kinda like Blocks and Delegates/Protocols. Think of libraries as just that, a resource you can use which doesn’t belong to you. A loaner 🙂 NOTE: If you need a nice tutorial on Blocks or Delegates, check out: Video Tutorial: Objective-C Blocks Video Tutorial: Objective-C Protocols and Delegates Ok back to our tutorial! Well a library is a piece of code that you can use (by importing it into your projects) but its not yours, so you can’t really do what you want to that piece of code, except use its functionality. In this tutorial we will create our… Read More
Continue ReadingBlocks & Completion Handlers
Think of blocks as c functions: (return type)functionName(input1, input2) { input1 + input2 } and you call it like this: return type = functionName (1,2) Blocks are similar: NSInteger (^mathOperation)(NSInteger x, NSInteger y) = ^NSInteger(NSInteger x,NSInteger y){ return x + y; }; You call it like this: NSInteger sum = mathOperation(1,2); Now imagine how cool it is to, instead of just passing a value to a method (like saying: here is a value, evaluate it), you can pass a whole method to it (like saying: here is something else to do!). Or better yet, here do this but only when you finish doing that! Like, load the users posts or tweets after you finish authenticating him!… Read More
Continue ReadingCreating Reactive Cocoa Xcode project
Earlier I posted an article on using RAC. It was a plain vanilla example of using RAC. While I AM working on a second post with more useful examples, I wanted to go over how to ADD RAC to a project. First, you must have ruby installed. This means, go to Terminal and type in: which ruby This is what I get: …../.rvm/rubies/ruby-2.1.0/bin/ruby Important to note here that if you don’t have that rvm bit, you might still have ruby. RVM stands for Ruby Version Manager and for what little I know about ruby, its one of the managers available for ruby but there are others. If… Read More
Continue ReadingReactive Cocoa in 3 simple steps!
If you made it through installing ReactiveCocoa, via Cocoapods, which required you to have ruby, update it and install Cocoapods and CLT, then you’re already ahead! So here is RAC. RAC is used when you need to be notified of something important in your app; completed download, some long asynchronous task like data fetching, parsing or image processing is complete or to update UI such as a completed form produces an active Submit button or an incomplete field yields a red warning sign to the user. How does RAC work? You basically create signals for events you are interested in (like the ones mentioned above) and then you tie those… Read More
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