By Gary Bennett, Brad Lees, Mitch Fisher
You could have an exceptional notion for an app, yet the place do you start? Objective-C is the common language of iPhone, iPad, and Mac apps, and Objective-C for Absolute novices, moment version begins you at the route to studying this language and its newest release.
Using a hands-on strategy, you'll tips on how to imagine in programming phrases, tips to use Objective-C to build application good judgment, and the way to synthesize all of it into operating apps. Gary Bennett, an skilled app developer and coach, will consultant you in your trip to turning into a winning app developer.
If you're trying to take step one in the direction of App shop good fortune, Objective-C for Absolute newcomers is where to begin.
Read or Download Objective-C for Absolute Beginners: iPhone, iPad, and Mac Programming Made Easy (2nd Edition) PDF
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Additional resources for Objective-C for Absolute Beginners: iPhone, iPad, and Mac Programming Made Easy (2nd Edition)
See Figure 2–21. When we write Objective-C code, everything is important—even semicolons, capitalization, and parentheses. The collection of rules that enable our compiler to compile our code to an executable app is called syntax. NSLog is a function that will print out the contents of its parameters in the console. CHAPTER 2: Programming Basics Figure 2–21. Our app with a syntax error caught by our Objective-C compiler. Now, let’s fix our app by adding the semicolon at the end of line 18. Building and running the app will enable us to see the output to the debug console.
Figure 2–4. The Edit Scene button in the World window is outlined with a box and is one of the most important controls. This button will launch Alice’s Scene Editor and enable us to add objects to our Alice World. CHAPTER 2: Programming Basics Take a minute to familiarize yourself with the Scene Editor shown in Figure 2–5. The Scene Editor enables us to: Add objects to our world from the gallery. Add objects to our world from the Internet. Position the objects in our world. Adjust the camera for viewing our world.
Object Tree The Object Tree (see Figure 2–6) enables us to view all of the objects in our Alice world. Additionally, if the object has subparts, you can view these subparts by clicking the plus sign, or collapse the subparts by clicking the minus sign. CHAPTER 2: Programming Basics Figure 2–6. The Object Tree Many of the Alice worlds come with several built-in objects that we will need for our apps. The world in Figure 2–6 comes with the Camera, Light, and Ground objects. Editor Area The Editor Area, the largest area of the Alice interface, is where we write our code.