Swift Intro

Transcript

1. SWIFT
2. iOS & Mac
3. Why?
4. Modern Safe Interoperable
5. Modern
6. Modern [ ]
7. Objective-C [someObject doSomething]; Swift someObject.doSomething()
8. Modern Blocks & Closures
9. Objective-C - (void)doSomethingWithCompletion:(void (^)(NSError *))completion; Swift func doSomethingWithCompletion(completion: (NSError) -> (Void))
10. Modern Primitives & Literals
11. Objective-C NSArray *numbers = @[@1, @2, @3]; // NSArray *numbers = [NSArray arrayWithObjects: // [NSNumber numberWithInt:1], // [NSNumber numberWithInt:2], // [NSNumber numberWithInt:3] // ]; Swift let numbers = [1, 2, 3]
12. Modern Custom Operators
13. Custom Operators { /* do some task */ } ~> { /* update some UI */}
14. Safety
15. Safety Static Typing
16. Safety Nil Safety
17. Objective-C SomeObject *someObject = nil; [someObject performCriticalTask]; Swift let someObject: SomeObject = nil someObject.performCriticalTask() // Compiler error
18. Objective-C SomeObject *object = nil; NSArray *objectList = @[object]; // Crash Swift let object: SomeObject? let objectList = [object] // :)
19. Safety Immutability
20. Objective-C NSArray & NSMutableArray Swift let & var
21. Common iOS Tasks Delegation
22. Objective C if ([self.delegate respondsToSelector:@selector(someDelegateMessage:)]) { [self.delegate someDelegateMessage:self]; } Swift delegate?.someDelegateMessage?(self)
23. Interoperability
24. Swift All The Things? Not So Fast
26. Xcode !
28. Tooling
29. Tooling REPL
30. Tooling Playgrounds
31. Playgrounds
32. Further Reference Learn Design AND Code!!! GitHub Swift Book Swift Blog objc.io Airspeed Velocity