Swift is an innovative, new programming language for Cocoa and Cocoa Touch, and it has made writing the codes not only interactive but also a fun filled activity. Swift comes with concise yet expressive syntax that makes the apps run lightning-fast. Swift code works side-by-side with Objective C to create iOS and Mac OS X applications.
While the popularity and acceptance of dynamic and user-friendly programming languages, like Python and Ruby, has grown immensely, Swift is estimated to be another step in that direction. Swift is designed primarily for safety and improving the memory corruption bugs caused by multi-threaded coding. Those already using it has a pleasant experience with the user friendliness of this programming language.
Similarities with Objective C
- Similar numeric types (Int, UInt, Float, Double)
- Most C operations are carried over to Swift including some new operators as well
- Curly braces for group statements
- Variables are assigned with an equal sign and compared using two consecutive equal signs
- New identity operator provided to check the data element reference
- Square brackets used with arrays
- Control statements ‘for’, ‘while’, ‘if’, ‘switch’ are similar and they do have extended functionality as well
Modern Programming Language
Swift was born with the latest research developments combined with decades of experience by Apple platform. Named parameters from Objective-C are expressed in a clean syntax that makes APIs in Swift even easier to read and maintain. Inferred types make code cleaner and less prone to mistakes, while modules eliminate headers and provide namespaces. Memory is managed automatically, and you don’t even need to type semi-colons.
Features that make the code expressive
- Structs that support methods, extensions, protocols.
- Closures unified with function pointers
- Fast and concise iteration over a range or collection
- Functional programming patterns
- Tuples and multiple return values
Writing Swift code got incredibly simple and fun with the help of interactive playground. All you need to do is type a line of code and the result would appear immediately. If the code runs over time, through a loop, one can watch its progress in the timeline assistant. The timeline displays variables in a graph and draws each step when composing a view to play an animated SpriteKit scene. Once the code is perfected, it has to be moved into the project. With playground you can:
- Experiment with new APIs to hone your Swift coding skills
- Design a new algorithm, watching its results every step of the way
- Create new tests, verifying they work before promoting into your test suite
The debugging console in Xcode includes an interactive version of the Swift language built right in. Use Swift syntax to evaluate and interact with your running app, or write new code to see how it works in a script-like environment.
With Swift, the entire classes of unsafe codes is just eliminated. Variables are always initialized before use, arrays and integers are checked for overflow, and memory is managed automatically and Syntax is tuned to make it easy to define your intent. The safe patterns are especially designed for Cocoa and Cocoa Touch APIs.
Fast and Powerful
Swift, the name itself says it’s fast. Using the high-performance LLVM compiler, Swift code is transformed into optimized native code, tuned to get the best out of modern Mac, iPhone, and iPad hardware. The syntax and standard library have also been tuned to make the most obvious way to write your code also perform the best.
Swift has the best features from C and Objective C language that includes low level primitives such as types, flow control, and operators. It also provides object-oriented features such as classes, protocols, and generics, giving Cocoa and Cocoa Touch developers the kind of performance and power they require.