Beginning iOS Programming Building and Deploying iOS by Nick Harris

By Nick Harris

IOS 7 replaced everything—get as much as speed!
iOS 7 is a massive shift within the appear and feel of apps—the first significant sea swap because the iPhone was once first brought. For apps to mixture in with the hot UI, every one wishes a whole remodel. starting iOS Programming: construction and Deploying iOS functions starts off on the beginning—including an creation to aim C—and grants the abilities you want to get your apps up and operating. writer Nick Harris has broad adventure constructing for iOS and offers a superb heritage for instructing the construction blocks of app development.
- examine Objective-C and the way it differs from different programming languages
- flip your app notion into an actionable plan
- construct every one function with the aid of standalone chapters
- gather your venture right into a real-world iOS app
Throughout the booklet, youll have the ability to scan with dozens of recipes from real-life situations, developing an app as you research. The books site beneficial properties obtain pattern apps to persist with besides the guideline, and pattern code to demonstrate principles.

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It was working on a legacy system built using C but wanted to add reusability to the code base by using objects and messaging. The concept of object-oriented programming (OOP) had been around for a while. The Smalltalk language developed by Xerox was the most prominent objectoriented language in use at the time. Objective-C got its start by taking some of the concepts and syntax of Smalltalk and adding it to C. This can be seen in the syntax of message passing in Objective-C and Smalltalk. 10 ❘ CHAPTER 2 INTRODUCTION TO OBJECTIVE-C Message passing is another way of saying method calling.

This is not the case with Objective-C. In Objective-C all methods that are declared in the interface are visible to other classes. If a class needs a private method, it just adds the method to the implementation. All code within the implementation can call that method, but it will not be visible to any classes that import the header file. In Objective-C, Most Classes Inherit from NSObject Another key concept of object-oriented languages is the capability of one class to inherit from another. In Java all classes inherit from the Object class.

Figure 2-1 illustrates how this works. Explaining the Basics ❘ 17 0x0008 Points to the Object 0x000F 0x000E 0x000D 0x000C 0x000B 0x000A 0x0009 0x0008 0x0007 0x0006 0x0005 0x0004 0x0003 0x0002 simpleClassInstance 0x0001 SimpleClass Object FIGURE 2-1 In Java and C# you can also declare your own constructors that can take a list of parameters and set the member variables of the object. Listings 2-11 and 2-12 add these constructors to the Java and C# example classes with sample code of how they are called.

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