Download Beginning iOS Programming: Building and Deploying iOS by Nick Harris PDF

By Nick Harris

ISBN-10: 1118841476

ISBN-13: 9781118841471

IOS 7 is a huge shift within the appear and feel of apps—the first significant sea switch because the iPhone used to be first brought. For apps to combination in with the hot UI, every one wishes a whole redecorate. starting iOS Programming: construction and Deploying iOS purposes begins on the beginning—including an advent to target C—and delivers the talents you must get your apps up and working. writer Nick Harris has broad event constructing for iOS and offers a fantastic history for educating the construction blocks of app improvement. in the course of the publication, possible test with dozens of recipes from real-life situations, developing an app as you examine. The book's site good points obtain pattern apps to keep on with in addition to the guideline, and pattern code to demonstrate rules.

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You can then refer to this new data type by the name you assigned it anywhere in your code. Listing 2-2 shows a simple yet silly example of typedef that creates a new data type called myInt, which is the same as the primitive int data type that can then be used the same as int throughout the code. Listing 2-2: typedef Example in Objective-C // Objective C typedef int myInt; myInt variableOne = 5; myInt variableTwo = 10; myInt variableThree = variableOne + variableTwo; // variableThree == 15; A typical use of typedef in Objective-C is naming a declared enumerated type.

This is referred to as draining the pool. Listing 2-19 shows how you would implement this. Listing 2-19: Using Autorelease in Objective-C - (void)simpleMethod { SimpleClass *simpleClassInstance = [[SimpleClass alloc] init]; [simpleClassInstance autorelease]; simpleClassInstance->firstInt = 5; simpleClassInstance->secondInt = 5; [simpleClass sum]; } Using alloc generally means that the code creating the object is its owner, which is why it gets a retain count of one. There are other times in your code where an object was created elsewhere but the code using needs to take ownership.

In OOP languages an object can send a message to or call a method of another object. All object-oriented languages include this. Listing 2-1 shows how message passing is done in Smalltalk, Objective-C, Java, and C#. aMessage(aParameter, bParameter); Objective-C got its foothold in mainstream programming when it was licensed by NeXT in the late 1980s. NeXT was a computer company founded by Steve Jobs after he was forced from Apple. It manufactured workstations for universities and big businesses.

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Beginning iOS Programming: Building and Deploying iOS Applications by Nick Harris

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