By Craig Hockenberry
Creating iPhone Apps with Cocoa contact: The Mini lacking handbook walks you thru constructing your first iPhone App and introduces you on your programming environments and instruments: Cocoa contact, Interface Builder, Xcode, and the Objective-C programming language. in case you are a Java or C developer, this booklet is your quick song to App improvement.
This e-book is customized from components of iPhone App improvement: The lacking Manual.
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Additional info for Creating iPhone Apps with Cocoa Touch: The Mini Missing Manual
In the first example, you were communicating with a window object. The second example interacts with a label object. ” Objective-C is what computer scientists call an object-oriented language. You’re going to be doing object-oriented programming as you develop your iPhone application. Tip: If you’re new to object-oriented programming, take a moment to read the Wikipedia page on this topic. org/wiki/Object-oriented_programming. Creating iPhone Apps with Cocoa Touch: The Mini Missing Manual 37 Objects are chunks of memory that contain code and data for your application.
If you see a message about incompatible pointer types, make sure you’re using @”string” instead of a standard C “string”. The “without a cast” warnings are usually an indicator that you’ve used a primitive type instead of an object (or vice versa). If you ignore these warnings, you’ll still be able to run your app, but it will crash as soon as these incompatible types are sent in a message. Note that this is just a class definition, so there’s no mention of where or how your string data is stored.
Time to change the background color of the window by clicking the Background color picker. Then click a nice color for the light in the color wheel (Figure 1-14). A soothing shade of yellow, for example. Creating iPhone Apps with Cocoa Touch: The Mini Missing Manual 30 B A C D Figure 1-14:â•‡ Changing your application window’s background color involves clicking a color wheel. xib document (A), you view the attributes (B), which include a background color. Clicking in the well (C) brings up a color wheel (D) where you can select a new color with your mouse.
Creating iPhone Apps with Cocoa Touch: The Mini Missing Manual by Craig Hockenberry