Download E-books MacRuby: The Definitive Guide: Ruby and Cocoa on OS X PDF

By Matt Aimonetti

Want to construct local Mac OS X purposes with a graceful, developer-friendly replacement to Objective-C? MacRuby is a perfect selection. This in-depth advisor exhibits you the way Apple’s implementation of Ruby supplies entry to the entire positive aspects to be had to Objective-C programmers. You’ll get transparent, specified causes of MacRuby, together with quickly programming recommendations equivalent to prototyping.

Perfect for programmers at any point, this e-book is choked with code samples and entire undertaking examples. if you happen to use Ruby, you could faucet your talents to exploit Interface Builder, Cocoa libraries, the Objective-C runtime, and extra. If you’re a Cocoa developer, you’ll the right way to enhance your productiveness with MacRuby.

  • Get in control on MacRuby fundamentals, together with periods and methods
  • Learn the right way to use MacRuby with Apple’s Xcode developer suite
  • Delve into the primitive item sessions and knowledge forms in starting place Kit
  • Build event-driven consumer interfaces with the AppKit framework
  • Handle relational item patience with the middle info framework
  • Use complex MacRuby recommendations, together with concurrency and sandboxing
  • Get examples for functions utilizing Twitter and a situation net service
  • Embed MacRuby into latest Objective-C applications

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Each one do |dev_name| Thread. new(dev_name){|name| places "Hello, #{name}! \n"} finish each one thread has entry to its personal neighborhood variable referred to as identify. MacRuby has been particularly designed with concurrency in brain. not like the most Ruby interpreter, threads are done in parallel and a number of threads can simultaneously name into MacRuby with out blocking off. Operations/Operation Queues facing threads could be very bulky and hard. fortunately, Cocoa encapsulates threads by way of grouping paintings that you really want to accomplish asynchronously into what are known as operations. Operations can be utilized all alone or queued up and prioritized to run asynchronously. Scheduling | sixty one Operations are mentioned extra intensive in “Concurrency” on web page one hundred forty, yet let’s examine how one can create a queue and upload operations to it. to do that, we are going to use the NSOperationQueue category and NSOperation. as the NSOperation category is an summary category, we are going to have to create a subclass to outline our customized operation and upload it to a queue: framework 'Foundation' category MyOperation < NSOperation attr_reader :name def initWithName(name) init @name = identify self finish def major places "#{name} get to paintings! " finish finish operation_matt = MyOperation. alloc. initWithName('Matt') queue = NSOperationQueue. alloc. init queue. addOperation(operation_matt) # run the most loop for two seconds NSRunLoop. currentRunLoop. runUntilDate(NSDate. dateWithTimeIntervalSinceNow(2. 0)) To create a sound NSOperation subclass, we have to create a customized initiator (in this example, we used initWithName) and outline a major procedure that may be completed while the operation is brought on. while making a customized initiator, don’t put out of your mind to come back self. Notifications so much purposes set off loads of occasions within the runtime, starting from a consumer clicking on a UI aspect to an I/O operation. Cocoa’s starting place offers a programming structure to be able to ship and obtain notifications and to sign up for happening occasions. The notification structure is split into 3 components: the notifications themselves, the notification facilities, and the notification observers. whilst an occasion occurs, a notification is created and despatched to a notification heart, which then declares the sixty two | bankruptcy 4: Foundation notification to the entire observers that registered for the development. Notifications can be held in a notification queue sooner than being broadcast. NSNotification gadgets encapsulate information regarding occasions. The items don’t recognize a lot approximately whatever other than the development that sends them. Notification facilities if you would like to control notifications in precisely one strategy, use the NSNotificationCenter classification. differently, you'll have to depend on NSDistributedNotificationCenter. As defined prior, notification facilities obtain notifications published by means of occasions and dispatch them to registered observers. Observers are additional to notification facilities, and notifications may be manually published to a middle or instantly caused via sessions triggering notifications. The default notification heart could be accessed utilizing the NSNotificationCenter.

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