The Swift Programming Language with iOS App
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This document summarizes a presentation on IOS 8 features and Swift development. It discusses new features in IOS 8 like battery usage indicator, interactive notifications, and healthkit. It then covers the basics of Swift syntax, how it differs from Objective-C, and sample code examples to illustrate arrays, dictionaries, functions and more. It concludes by noting some pros and cons of Swift and provides reference links for further reading.
![ Objective C
[NSString stringWithFormat:]
Swift
(expression)
Let var1 = 2
Let var2 = 3
Println( “Multiplication is : (var1 * var2)”)](https://image.slidesharecdn.com/theswiftprogramminglanguagewithiosapp-140806053422-phpapp01/85/The-Swift-Programming-Language-with-iOS-App-9-320.jpg)
![1. let someArray:String[] = [“A”, “B”, “C”]
2. let someArray = [“A”, “B”, “C”]
3. var someArray:String[] = [“A”, “B”, “C”]
4. SomeArray += “D”
5. SomeArray += [“D”, “E”]
6. print(“First Element :(someArray[0]) ”)](https://image.slidesharecdn.com/theswiftprogramminglanguagewithiosapp-140806053422-phpapp01/85/The-Swift-Programming-Language-with-iOS-App-10-320.jpg)
![1. let dict:Dictionary<String, String> = [“A”:”1”,
“B”:”2”]
2. var dict:Dictionary<String, String> = [“A”:”1”,
“B”:”2”]
3. var dict = [“A”:”1”, “B”:”2”]
1. dict[“C”] = “3”
2. Dict += [“D”:”4”, “E”:”5”]](https://image.slidesharecdn.com/theswiftprogramminglanguagewithiosapp-140806053422-phpapp01/85/The-Swift-Programming-Language-with-iOS-App-11-320.jpg)
The Swift Programming Language with iOS App
- 1. IOS 8 Features and Swift Development Presenter: Vivek Chaudhary, Mindfire Solutions Date: 08/05/2013
- 2. IOS 8 Features Swift Development Syntax and Basics Objective C to Swift Sample Code Pros and Cons
- 3. Battery usage indicator Interactive Notifications Credit Card Scanning New keyboard Continuity Family Sharing
- 4. Message UI and new widgets Lock screen app suggestions Healthkit Improved search results
- 5. Some syntax from Java Script Smartly detects data types itself Objective C API + Additional No semicolon Body Braces compulsory for If-else
- 6. Single file in place of two files (.h and .m) Declaration and implementation in the same file Reduces the project size Number of files reduces to half
- 7. 1. let someConstant : String = “constant” 2. var someVar : String = “variable” Swift is smart enough to detect data types Var someVar = “variable” Var var1 = 1 Var var2 = 1.0
- 8. NSString and String both are available 1. Let string = “Hello” 2. Let anotherString = string + “Mindfire” 1. For char in str 2. { 3. // Code Here 4. }
- 9. Objective C [NSString stringWithFormat:] Swift (expression) Let var1 = 2 Let var2 = 3 Println( “Multiplication is : (var1 * var2)”)
- 10. 1. let someArray:String[] = [“A”, “B”, “C”] 2. let someArray = [“A”, “B”, “C”] 3. var someArray:String[] = [“A”, “B”, “C”] 4. SomeArray += “D” 5. SomeArray += [“D”, “E”] 6. print(“First Element :(someArray[0]) ”)
- 11. 1. let dict:Dictionary<String, String> = [“A”:”1”, “B”:”2”] 2. var dict:Dictionary<String, String> = [“A”:”1”, “B”:”2”] 3. var dict = [“A”:”1”, “B”:”2”] 1. dict[“C”] = “3” 2. Dict += [“D”:”4”, “E”:”5”]
- 12. + and – are sliced off. func functionName(var1:String, var2:String)- >String Functions can return more than one parameters too. These are returned in the form of tuples.
- 13. Function Definition func functionName(var1:String, var2:String)- >(String, Int) Function Calling Var result : (res1:String, res2:Int) = self.functionName(var1:”Hello”, var2:”Mobile”) Print(“result is (result.res1)”;
- 14. Type id changes to AnyObject Downcast is done automatically by swift. “as” keyword is used to typecast Var textField: UITextField = array.firstObject() as UITextField
- 15. One has to manually change his Objective C code to Swift - changes to func + changes to class func #define changes to let #pragma changes to // MARK :
- 16. init is not used in swift. InitWith and with is also not used. Complex macros should be converted into functions Let myColor = UIColor(red:0.5, green:0.5,blue:0.5, alpha:1.0);
- 17. PLAYGROUNDS
- 20. Presenter: Debasish Mohanty, Mindfire Solutions Thank you