iOS for Android Developers (with Swift)
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The document is a guide for Android developers transitioning to iOS using Swift, covering essential concepts and differences between the two platforms. It highlights Swift's modern features, project structure, app architecture, and coding practices, comparing them with Java and Android. The author aims to help developers understand the basics of iOS development to meet client demands and improve earning potential.
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3. As a rule of thumb, use structs when encapsulating simple data or when copies should have independent state, while classes should be used for shared, mutable state or complex frameworks.
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iOS for Android Developers (with Swift)
- 1. iOS for Android Developers with Swift David Truxall, Ph.D. http://bit.ly/androidToIos
- 3. You ● Know Java ● Know Android ● Don’t know Swift ● Don’t know iOS ● Need a Mac
- 4. Goal Learn basic iOS concepts for someone familiar with Android (using Swift)
- 5. Why? ● Do I hate Android now? ● Neither platform is “the winner” ● Clients want both platforms ● You can make more money ● Swift is the new hotness in mobile ● Objective-C
- 6. Agenda 1. Brief language intro 2. Project/Tool Structure 3. App Architecture 4. Coding Demo
- 7. Swift ● Object-oriented AND Functional ● C family ● Cleaner, simpler, safer than Objective-C ● Modern features
- 8. Compare - (NSString*) concatenateString:(NSString*)stringA withString:(NSString*)stringB { NSString *finalString = [NSString stringWithFormat:@"%@%@", stringA, stringB]; return finalString; } func concatenateString(stringA: String, stringB: String) ->String { let result = stringA + stringB return result }
- 9. Swift Features ● Closures ● Tuples and multiple return values ● Generics ● Structs that support methods ● Functional programming patterns
- 10. Java/Android Swift/iOS import com.package.name; import frameworkname int counter; var counter :Int static final int LEVELS = 8; let levels = 8 private private public public - internal (*) protected - Language
- 11. Java/Android Swift/iOS class Foo extends Bar {} class Foo : Bar interface Baz{} protocol Baz class Foo implements Baz{} class Bar : Baz {} Foo(); init() void doWork(String arg){} func doWork(arg: String) -> Void Foo item = new Foo(); var item : Foo = Foo() item.doWork(arg); item.doWork(arg) Objects
- 12. Optionals ? - Has a value or no value at all (nil) ! - Implicitly Unwrapped Optional
- 13. Swift OO class VideoMode { var resolution : Resolution = Resolution() var interlaced = false let frameRate = 60.0 var name: String? func setUpMode(modeName: String) -> Void {<do stuff>} }
- 14. Swift Functional func addTwoInts(a: Int, b: Int) -> Int { return a + b } var addFunction: (Int, Int) -> Int = addTwoInts func printMath(mathFunction: (Int, Int) -> Int, a: Int, b: Int) { println("Result: (mathFunction(a, b))") } printMath(addTwoInts, 3, 5)
- 15. Xcode ● Free ● It’s an IDE ● Click not double-click ● Virtual file organization
- 16. Demo
- 17. Application Architecture Model - View - Controller UI Organization and Plumbing
- 18. Model - View -Controller Controller ModelView Update User Action Update Notify
- 20. iOS Model - View -Controller ViewController Custom ClassesUIView Update via IBOutlet Respond to IBAction Update Notify
- 21. UI Organization Android iOS Layout XML XIB (NIB) - Storyboard - IBOutlet - IBAction Intent ~ Segue
- 22. Lifecycle Events Android iOS onCreate (onCreateView) viewDidLoad onStart viewWillAppear onResume viewDidAppear onPause viewWillDisappear onStop viewDidDisappear
- 23. UI Elements Android iOS TextView UILabel EditText (single line) UITextField EditText (multi-line) UITextView Button UIButton RadioGroup SegmentedControl CheckBox, ToggleButton UISwitch
- 24. Delegation ● Class has a property that is a protocol ● Second class implements the protocol ● Second class assigned to the variable in the first class
- 26. Yet Another Shameless Plug @davetrux blog.davidtruxall.com http://bit.ly/androidToIos
- 27. Resources Apple's Swift iBook Swift Developer Center Migrating to Swift from Android Book Empty Application template http://bit.ly/androidToIos