Download Objective-C for Absolute Beginners: iPhone, iPad and Mac by Gary Bennett, Brad Lees, Mitchell Fisher PDF

By Gary Bennett, Brad Lees, Mitchell Fisher

You have an exceptional concept for an app, yet how do you deliver it to fruition? Objective-C is the common language of iPhone, iPad, and Mac apps, and this publication starts off you at the route to learning this language and its most modern liberate, and likewise addresses easy methods to combine speedy with Objective-C.

Using a hands-on strategy, you are going to tips on how to imagine in programming phrases, the best way to use Objective-C to build application common sense, and the way to synthesize all of it into operating apps. Gary Bennett, an skilled app developer and coach, will advisor you in your trip to turning into a winning app developer. in case you are trying to take step one in the direction of App shop good fortune, Objective-C for Absolute newcomers, 3rd variation is where to start.

What you'll Learn:

  • The basics of computing device programming: how one can comprehend variables, layout facts constructions, and paintings with dossier systems
  • The common sense of object-oriented programming: tips on how to use sessions, gadgets, and Methods
  • Who This ebook Is For:

    Everyone! This ebook is for an individual who desires to discover ways to strengthen apps for the iPhone, iPad, Mac, or Watch utilizing the Objective-C programming language. No prior programming event is necessary!

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Extra resources for Objective-C for Absolute Beginners: iPhone, iPad and Mac Programming Made Easy

Sample text

It was about as powerful as your handheld calculator. Today, computers use transistors to store and manipulate data. The power of a computer processor depends on how many transistors are placed on its chip or CPU. Like the vacuum tube, transistors have an off or on state. When the transistor is off, its value is 0. If the transistor is on, its value is 1. At the time of this writing, the A9 processor powers the iPhone 6s, 6s Plus, and SE, and it has a dual-core ARM processor with approximately 4 billion transistors, up from 149 million transistors on the A4 processor that was in iPhone 4 and the first iPad.

Click the right Alien, drag the Alien|say tile to the Editor area, select Custom TextString, and then type That’s one small step for man. . One giant leap for mankind. Your app should look like Figure 2-14. CHAPTER 2 ■ PROGRAMMING BASICS Figure 2-14. Your Editor area should have these methods within the listed parameters 18. Let’s run your first program by clicking the Run button. If you have completed everything correctly, your app should look like Figure 2-15 when it runs. If not, you have some debugging to do.

In this case, it terminated normally. You can see this with the message Program ended with exit code: 0, which means your app didn’t crash. See Figure 2-22. 30 CHAPTER 2 ■ PROGRAMMING BASICS Figure 2-22. The app executing in the Debugger Console Let’s modify the application to do what we did with the Aliens: 1. m file. 2. Change lines 14 and 15 to look like Figure 2-23. Figure 2-23. The app with a syntax error caught by the Objective-C compiler 31 CHAPTER 2 ■ PROGRAMMING BASICS 3. You are going to intentionally misplace a semicolon at the end of line 8.

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