Mac Programming for Absolute Beginners by Wallace Wang

By Wallace Wang

Are looking to how to software in your Mac? unsure the place to start? Best-selling writer Wallace Wang will clarify the way to start with Cocoa, Objective-C, and Xcode. even if you're an skilled home windows coder relocating to the Mac, otherwise you are thoroughly new to programming, you will see how the elemental layout of a Mac OS X application works, how Objective-C differs from different languages you will have used, and the way to exploit the Xcode improvement surroundings. most significantly, you will the way to use parts of the Cocoa framework to create home windows, shop info, and reply to clients on your personal Mac courses. for you to how you can enhance apps with Cocoa, Objective-C, and Xcode, this ebook is a brilliant first step.

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There are also multiple programming forums where you can post questions and get a response fairly quickly, depending on the nature of your question. Unfortunately, you can’t always rely on the Internet to help you find the answers to your problems. Sometimes people won’t know the answer. Other times you can’t afford to wait a day or two until someone responds. In these situations, you need to know how to find help on your own right away. When you might know what you want to do but have no idea how to do it, that’s when you need to turn to Xcode’s help system.

The Interface Builder windows appear. xib window. A heads-up display window appears, as shown in Figure 3–7. Figure 3–7. Right-clicking an icon displays a window. 2. Move the mouse pointer over the little circle that appears to the right of the message (under the Outlets heading) at the top of the window. Drag the mouse over the Label object on the user interface, and release the mouse button, as shown in Figure 3–8. Figure 3–8. Dragging from the Outlet circle to the user interface connects the message variable to the Label object.

Connecting your method to your user interface push button tells Xcode to run the connected method whenever the user clicks that particular push button. 37 38 CHAPTER 3: The Basic Steps to Creating a Mac Program Writing Objective-C Code The goal is to make the push button change the currently displayed text in the label. To do this, you need to write two types of Objective-C code called Actions and Outlets. An Action responds to something from the user interface, such as the user clicking a push button.

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