Learning Swift: Building Apps for OS X and iOS

By Paris Buttfield-Addison

Get hands-on adventure with Apple’s fast programming language by means of construction genuine operating apps. With this sensible advisor, expert programmers with very little wisdom of Apple improvement will tips on how to code with quick 2 via constructing 3 entire, tightly associated types of the Notes software for the OS X, iOS, and watchOS platforms.

In the method, you’ll examine Swift’s basics, together with its syntax and contours, besides the fundamentals of the Cocoa, CocoaTouch, and WatchKit frameworks. This ebook teaches you ways to take advantage of universal layout styles for rapid, how one can constitution an software for Apple’s structures, and the way to post operating apps to the App Store.

Divided into 4 special components, this publication includes:

  • Swift 2 basics: study Swift’s beneficial properties for object-oriented improvement, in addition to numerous developer tools
  • OS X app development: manage your app, paintings with its files, and construct out its features
  • iOS app development: Use multimedia, contacts, situation, notifications, and iCloud documents to construct a completely featured iOS Notes app
  • Advanced app extensions: help Apple Watch and how to debug, video display, and try out all 3 of your fast apps

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DocumentViewController { // If it is a URL we will be able to open... if enable url = sender as? NSURL { // give you the url to the view controller documentVC. documentURL = url } else { // it is whatever else, oh no! fatalError("ShowDocument segue used to be known as with an " + "invalid sender of sort \(sender. dynamicType)") } } } The prepareForSegue strategy is termed every time the view controller is set to teach one other view controller, through a segue. It gets as its parameters the segue itself, represented through a UIStoryboardSegue item, in addition to no matter what item used to be liable for triggering the segue. relating to the ShowDocument segue, the sender is an NSURL, simply because we handed that during because the sender parameter to the performSegueWithIdentifier strategy in didSelectItemAtIndexPath. To get the view controller that we’re approximately to transition to, we ask the segue for its destinationViewController estate and ask speedy to aim to provide it to us as a DocumentViewController. subsequent, we double-check the kind of the sender and ensure that it’s an NSURL. ultimately, we supply the view controller the URL. Now’s a good time to construct and run the app. you want to now have the capacity to faucet on rfile thumbnails and segue to the modifying monitor, and get a “back” button to come to the rfile checklist, that is supplied immediately via the navigation controller. Edits should be made, notwithstanding they can’t be kept but. yet, nonetheless! There’s a few stable growth occurring right here. eventually, we additionally are looking to open files that we’ve simply created. We’ll do that by way of making a approach known as openDocumentWithPath, so that it will obtain a String that incorporates a course. it's going to arrange an NSURL, after which name performSegueWithIdentifier, passing the URL because the sender. be aware We’ll be utilizing this system from a number of varied locations later during this publication, so we’re placing it in a style. enforce the openDocumentWithPath technique, which takes a direction and makes an attempt to open it: func openDocumentWithPath(path : String) { // construct a dossier URL from this direction allow url = NSURL(fileURLWithPath: course) // Open this record self. performSegueWithIdentifier("ShowDocument", sender: url) } subsequent, whilst a rfile is created, we’ll wish the app to instantly open it for modifying. upload the calls to openDocumentWithPath to the createDocument process: func createDocument() { // Create a distinct identify for this new rfile // by way of including a random quantity enable documentName = "Document \(arc4random()). notice" // determine the place we'll shop it briefly permit documentDestinationURL = DocumentListViewController . localDocumentsDirectoryURL . URLByAppendingPathComponent(documentName) // Create the record and take a look at to put it aside in the neighborhood enable newDocument = Document(fileURL:documentDestinationURL) newDocument. saveToURL(documentDestinationURL, forSaveOperation: . ForCreating) { (success) -> Void in if (DocumentListViewController. iCloudAvailable) { // If we have now the power to take advantage of iCloud... // If we effectively created it, try to // movement it to iCloud if luck == real, enable ubiquitousDestinationURL = DocumentListViewController.

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