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Application Development with Swift by Hossam Ghareeb

By Hossam Ghareeb

Develop hugely effective and beautiful iOS purposes through the use of the quick language

About This Book
• advance a sequence of purposes with rapid utilizing the improvement kits and new/updated APIs
• Use the hot positive factors of iOS eight so as to add new style for your applications
• A hands-on advisor with distinctive code snippets to assist you in constructing strong rapid applications

Who This booklet Is For
If you're an iOS developer with adventure in Objective-C, and need to improve functions with speedy, then this publication is perfect for you. Familiarity with the basics of speedy is an additional virtue yet no longer a necessity.

What you'll Learn
• Use playgrounds in Xcode to make the writing of fast code effective and easy
• Get conversant in the complicated beneficial properties of quick and make entire use of them on your code
• upload a brand new approach for authentication on your app utilizing contact ID
• improve health-related apps utilizing HealthKit
• Take your apps to the following point of functionality and potential utilizing Met
• increase purposes for wearables utilizing WatchKit
• Use Notification middle to simply entry your entire notifications
• Make your clients units extra trendy by utilizing Apple's integrated quickly variety keyboard, rather than the local one

In Detail
After years of utilizing Objective-C for constructing apps for iOS/Mac OS, Apple now deals a brand new, inventive, effortless, and cutting edge programming language for software improvement, known as fast. quick makes iOS program improvement a breeze by means of delivering pace, defense and tool on your software improvement procedure. quick is straightforward to benefit and has extraordinary positive aspects corresponding to being open resource, debugging,interactive playgrounds, mistakes dealing with version, and so forth. quick has simplified its reminiscence administration with automated Reference Counting (ARC) and it really is appropriate with Objective-C.

This e-book has been created to supply you with the data and abilities you should utilize the recent programming language quick. The publication begins with an advent to fast and code constitution. Following this, you'll use playgrounds to get to grips with the language very quickly. Then the booklet takes you thru the complex positive aspects provided via rapid and the way to exploit them together with your previous Objective-C code or initiatives. you'll then learn how to use fast in actual initiatives via protecting APIs comparable to HealthKit, steel, WatchKit, and contact identity in every one bankruptcy. The book's effortless to keep on with constitution guarantees you get the simplest begin to constructing purposes with Swift.

Style and approach
The publication achieves its finish aim by way of dividing its content material into components. half 1 will take the readers, who're new to fast, via its structure and fundamentals. half 2 of the ebook will conceal content material on software improvement with Swift.

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Additional info for Application Development with Swift

Sample text

So, if you want to override –a, you use prefix, and for i++, use postfix. y + 1) } [ 32 ] Chapter 2 let p1 = CGPoint(x: 1, y: 4) let p11 = -p1 //{x -1 y -4} let p22 = p1++ //{x 2 y 5} As we can see in the examples, we override the two operators, - and ++. The two functions take only one parameter, as they are unary operators. Other types of operators that I want to mention are compound operators, such as += and -=. In these types of operators, we create a function that takes two parameters, lhs and rhs, and then we mark the lhs parameter with the inout keyword to indicate that this parameter will be modified directly and that there is no need to return anything in this function.

Then, we used center and size to get the origin point. We then used the built-in initializer that accepts x, y, width, and height. Adding methods In extensions, you can add instance methods and type methods to any existing type. You can call these new methods easily anywhere in your code. Let's see an awesome example in extending the Int type to contain a method that executes a piece of code repeatedly with integer value times. repeatTask{ println("Hello Swift") } In the previous code, we added a new method called repeatTask that accepts closure with the format () -> (), which means that it takes no parameters and returns nothing.

So, take care when you define relations between classes and understand when to use strong, weak, or unowned. Using Objective-C and Swift in a single project As an iOS developer, before Apple released Swift, you may feel worried about your old code in Objective-C and wonder if you can use them together. The answer is yes, you can use Swift and Objective-C together in a single project, and everything will be fine, irrespective of whether the project was originally in Swift or Objective-C. This compatibility is very important in making the language easy to use and has been welcomed by all developers.

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