By Danny Goodman
Why trouble with the SDK if you happen to can easily construct internet apps for Apple's iOS units? net apps cannot entry an iPhone's song library, digital camera, or iOS approach software program for maps, audio, and extra. Nor are you able to promote internet apps within the App shop. that allows you to take complete benefit of the iPhone and iPad, iOS four SDK is your device -- and this can be your publication. comprises complete assurance of iOS SDK 4.2.
- Learn the excellence among internet app and iOS local app programming
- Create a workbench app to check code snippets through the studying method
- Get a structural view of an iOS app, and evaluate the method of establishing gadgets in Objective-C as opposed to JavaScipt
- Discover how your code launches iOS apps and makes them user-ready
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Connections Inspector for the Run My Code button The event you’re interested in is known as Touch Up Inside, meaning the event fires when a user releases his or her finger from anywhere inside the boundaries of the button. Click in the empty circle to the right of Touch Up Inside and drag the mouse to the File’s Owner item in the document window, as shown in Figure 3-17. The File’s Owner represents the WorkbenchViewController, where the source code for the method lives. As you drag, a blue line follows the cursor, and the intended destination highlights as shown.
Drag the bottom divider upward to reveal more of the editor Figure 2-10. Select a source code file to view its contents in the editor 20 | Chapter 2: Welcome to the iOS SDK Sample source code files supplied by Apple almost always begin with a lengthy comment (in green text according to the default text-color scheme). After a brief description of the file comes a lot of legal and licensing text. The actual code comes afterward. Feel free to scroll down the editor to get a taste of what iOS SDK app source code in Objective-C looks like.
Xcodeproj file is the master hub for everything associated with the app and is the file you open whenever you want to work on an app. Figure 2-8 shows the Xcode project window for TheElements sample project. Figure 2-8. TheElements project window in Xcode While the project window may look intimidating at first, you won’t be dealing with most of what you see here on a daily basis. Your focus will primarily be on items listed in the lefthand Groups & Files section and mostly on items in the top group (above the Targets group).