Programming

Cocoa in a Nutshell: A Desktop Quick Reference by Michael Beam, James Duncan Davidson

By Michael Beam, James Duncan Davidson

Cocoa® is greater than only a selection of sessions, and is unquestionably greater than an easy framework. Cocoa is an entire API set, category library, framework, and improvement atmosphere for construction functions and instruments to run on Mac OS® X. With over 240 periods, Cocoa is split into crucial frameworks: origin and alertness package. particularly else, Cocoa is a toolkit for developing Mac OS X program interfaces, and it presents entry to all the regular Aqua® interface parts comparable to menus, toolbars, home windows, buttons, to call a few.Cocoa in a Nutshell starts with an entire evaluation of Cocoa's item periods. It presents builders who should be skilled with different software toolkits the grounding they'll have to commence constructing Cocoa functions. universal programming initiatives are defined, and lots of chapters concentrate on the bigger styles within the frameworks so builders can comprehend the bigger relationships among the periods in Cocoa, that is necessary to utilizing the framework effectively.Cocoa in a Nutshell is split into components, with the 1st half offering a sequence of assessment chapters that describe particular good points of the Cocoa frameworks. info you'll locate partly I includes:
An assessment of the Objective-C language
Coverage of the root and alertness package frameworks
Overviews of Cocoa's drawing and textual content dealing with classes
Network companies equivalent to hosts, Rendezvous URL providers, sockets, and dossier handling
Distributed notifications and dispensed items for interapplication communication
Extending Cocoa functions with different frameworks, together with the AddressBook, DiscRecording, and Messaging frameworks
The moment 1/2 the booklet is a close speedy connection with Cocoa's beginning and alertness package (AppKit) periods. A supplement to Apple's documentation, Cocoa in a Nutshell is the single connection with the periods, features, forms, constants, protocols, and techniques that make up Cocoa's origin and alertness package frameworks, in line with the Jaguar liberate (Mac OS X 10.2). Peer-reviewed and licensed through Apple's engineers to be a part of the Apple Developer Connection (ADC) sequence, Cocoa in a Nutshell is the booklet builders will wish shut handy as they paintings. It's the machine quickly reference they could preserve by way of their part to appear whatever up quick with no leaving their work.Cocoa in a Nutshell is the ebook builders will wish shut to hand as they paintings. It's the computer speedy reference they could continue via their aspect to seem anything up quick with no leaving their paintings.

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Example 2-10. A sampling of NSMutableArray methods // Create a mutable array from an immutable array NSMutableArray *ma = [NSMutableArray arrayWithArray:a]; // Create an empty mutable array NSMutableArray *ma = [NSMutableArray array]; // Exercise mutability [ma [ma [ma [ma addObject:@"World"]; insertObject:@"Hello" atIndex:0]; removeObjectAtIndex:0]; removeLastObject]; // // // // ma ma ma ma is is is is {World} {Hello, World} {World} {} Sets NSSet declares an interface to unordered collections of unique objects.

20 | Chapter 2: Foundation This is the Title of the Book, eMatter Edition Copyright © 2008 O’Reilly & Associates, Inc. All rights reserved. To initialize an NSString from Unicode characters, first assemble a C array of the Unicode character codes, which are of the type unichar. Example 2-2 shows how to use hexadecimal character codes to specify the Unicode characters for the string “αβγδε”: Example 2-2. Working with Unicode strings and NSString objects Foundation // Create the unichar string "αβγδε" unichar uc[5] = {0x03b1, 0x03b2, 0x03b3, 0x03b4, 0x03b5}; // Initialize an NSString with a Unicode string NSString *uStr = [NSString stringWithCharacters:&uc length:5]; // Copy the Unicode characters into a buffer unichar uc2[5] = [uStr characterAtIndex:0]; The entire Unicode character set catalog is available at http://www.

This additional flexibility is provided at the expense of decreased efficiency. Example 2-4 illustrates several commonly used methods in NSMutableString. Example 2-4. "]; Comparing strings NSString provides several methods for comparing strings and testing equality. NSObject declares the method isEqual: to test general object equality. This method works with NSString objects, but the NSString method isEqualToString: more efficiently tests the equality of two objects known to be strings. Using it returns YES if the ids of the two strings are equal (which implies that the variables point to the same object) or if the result of a lexical comparison between the strings is NSOrderedSame.

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