Read e-book online Objective-C Quick Syntax Reference PDF

By Matthew Campbell

ISBN-10: 1430264888

ISBN-13: 9781430264880

The Objective-C quickly Syntax Reference is a condensed code and syntax connection with the preferred Objective-C programming language, that is the middle language in the back of the APIs present in the Apple iOS and Mac OS SDKs. It offers the basic Objective-C syntax in a well-organized structure that may be used as a convenient reference.

You won’t locate any technical jargon, bloated samples, drawn out heritage classes, or witty tales during this publication. What you'll find is a language reference that's concise, to the purpose and hugely available. The e-book is jam-packed with precious details and is a must have for any Objective-C programmer.

In the Objective-C quickly Syntax Reference, you are going to find:
* A concise connection with the Objective-C language syntax.
* brief, basic, and concentrated code examples.
* A good laid out desk of contents and a complete index permitting effortless evaluation.

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Extra resources for Objective-C Quick Syntax Reference

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The first thing that you will notice is that you need to have a counter variable on hand to use in a while loop. You can’t just put the counter variable right in the body of the loop like you did before. So you need a separate line of code before the while loop to declare and assign the counter variable. int i = 0; 37 CHAPTER 11 N WHILE LOOPS Then you have the while loop itself that is started with the while keyword. In the parentheses after the while keyword is the ending condition, (i < 10). This means that the loop will go on as long as the value of i is less than 10.

What makes this a good tool is that you can share the code for the methods that are common among a type of class. Overriding Methods Another thing you can do is override a method from your superclass. Overriding a method means that you are going to write your own version of a method with the exact same signature (the collection of parameter descriptors). The code in your method will be different so this means that objects from the inherited class will behave differently even though they get the same message sent to them as the superclass.

BOOL isTrue = 1 == 2; if(isTrue){ NSLog(@"isTrue = NSLog(@"That was } else{ NSLog(@"isTrue = NSLog(@"That was } %@", isTrue ? "); %@", isTrue ? "); In the code above, you are assigning the result of an expression to the Boolean variable isTrue and then testing this later on with an if statement. Here is what you will see in the console log if you test this code for yourself: isTrue = NO That was not a true statement. 44 CHAPTER 15 Switch Statements Switch Statements Defined Switch statements are used to execute code based on the value of an integer.

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Objective-C Quick Syntax Reference by Matthew Campbell


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