By Erik M. Buck, Donald A. Yacktman
"Next time a few child exhibits up at my door inquiring for a code evaluate, this can be the ebook that i'm going to throw at him."
-Aaron Hillegass, founding father of giant Nerd Ranch, Inc., and writer of Cocoa Programming for Mac OS X
Unlocking the secrets and techniques of Cocoa and Its Object-Oriented Frameworks
Mac and iPhone builders are usually crushed by means of the breadth and class of the Cocoa frameworks. even though Cocoa is certainly large, when you comprehend the object-oriented styles it makes use of, you'll locate it remarkably stylish, constant, and simple.
Cocoa layout Patterns starts off with the mum of all styles: the Model-View-Controller (MVC) trend, that is crucial to all Mac and iPhone improvement. inspired, and sometimes enforced through Apple's instruments, it's very important to have a company clutch of MVC correct from the start.
The book's middle is a catalog of the fundamental layout styles you'll come upon in Cocoa, including
Fundamental styles, equivalent to enumerators, accessors, and two-stage creation
•Patterns that empower, comparable to singleton, delegates, and the responder chain
•Patterns that conceal complexity, together with bundles, type clusters, proxies and forwarding, and controllers
And that's now not them all! Cocoa layout Patterns painstakingly isolates 28 layout styles, observed with real-world examples and pattern code you could follow for your functions at the present time. The booklet wraps up with assurance of middle facts versions, AppKit perspectives, and a bankruptcy on Bindings and Controllers.
Cocoa layout Patterns truly defines the issues each one development solves with a origin in Objective-C and the Cocoa frameworks and will be utilized by any Mac or iPhone developer.
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Extra resources for Cocoa Design Patterns
NSTableView is a prime example of the way controls use cells. You don’t have to subclass NSTableView just to control how information is presented. Instead, configure the standard NSTableView with different embedded cells. Application Kit Support for Controller Subsystems Cocoa’s NSController class and related classes like NSArrayController fulfill the role of “mediator” betweenView objects and Model objects. Mediators control the flow of information and in some cases supply default “placeholder” values.
The Two-Stage Creation pattern must be followed to effectively use Cocoa. Two-Stage Creation simplifies instance initialization when creating subclasses of Cocoa classes and provides methods for the convenient creation and initialization of temporary objects. This chapter describes Cocoa’s Two-Stage Creation and explains how it achieves the following goals: n n n Enable the use of initializers regardless of the way memory is allocated Avoid the need to implement too many initializers when subclassing Simplify the creation and use of temporary instances A little history helps to emphasize the reasons why Cocoa uses Two-Stage Creation.
Users drag the divider bar with the mouse to control how much of each subview is visible. NSScrollView repositions its subviews as users drag scroll bars. The NSControl class plays key roles in the Targets and Actions and the Responder Chain patterns explained in Chapter 17 and Chapter 18, respectively. For example, when a user selects a date via an NSDatePicker object, an action message is sent to the date picker’s target. If no specific target exists, the object that eventually receives the message is determined by the Responder Chain.