Here's a quick review of our Swift code with a comparison to the Objective-C equivalent.
Here's a sample code in Objective-C:
const int MAX_ENEMIES = 10; //constant
float playerPower = 1.3; //variable
//Array of NSStrings
NSArray * stageNames = @[@"Downtown Tokyo", @"Heaven Valley", @" Nether"];
//Set of various NSObjects
NSSet *items = [NSSet setWithObjects: Weapons, Armor,
HealingItems,"A", nil];
//Dictionary with an Int:String key:value
NSDictionary *inventory = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithInt:1], @"Buster Sword",
[NSNumber numberWithInt:43], @"Potion",
[NSNumber numberWithInt:22], @"Strength",
nil];Here's the equivalent code in Swift:
let MAX_ENEMIES = 10 //constant
var playerPower = 1.3 //variable
//Array of Strings
let stageNames : [String] = ["Downtown Tokyo","Heaven Valley","Nether"]
//Set of various NSObjects
var items = Set([Weapons, Armor, HealingItems,"A"])
//Dictionary with an Int:String key:value
var playerInventory: [Int : String] = [1 : "Buster Sword", 43 : "Potion", 22: "StrengthBooster"]In the preceding code, we used some examples of variables, constants, arrays, sets, and dictionaries. First, we see their Objective-C syntax and then the equivalent declarations using Swift's syntax. From this example, we can see how compact Swift is compared with Objective-C.
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