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I would say that new apps are being written in Swift, while the old ones will stay with Obj-C. It's too complex to mix Obj-c and Swift, so why go through the tr

• melling 11y ago
  It's trivial to add Swift to an Objective C project. Create a bridging file then either create a new Swift class or extend an existing Objective C class. extension MyViewController { func myFirstSwiftFunc() -> Bool { return true } }
  • charlesdm 11y ago
    Mixing both adds complexity to the codebase, though. Might as well stick to Objective-C for legacy projects and Swift for new projects.
    • melling 11y ago
      I think you're overstating the complexity. The real problem is once you see how visually noisy Objective C is compared to Swift, you'll get the urge to translate your ObjC code. NSString *s = @"Swift is the future"; UIViewController *vc = [[UIViewController alloc] init]; NSArray *names = @[@"John", @"Paul", @"George", @"Ringo"]; vs let s = "Swift is the future" let vc = UIViewController() let names = ["John", "Paul", "George", "Ringo"]
      • xyzzy4 11y ago
        But the "noise" also reduces ambiguity. For example, you can search the code and see s is a NSString in Objective C. You can't do this in Swift.
        • maxdesiatov 11y ago
          You can just alt-click on the variable in Xcode and see the inferred variable type instantly, no matter what the type is or where the variable is declared. No need to search. You can't do this in Objective-C.
        • melling 11y ago
          Can't say that I see the value in that but you do have the option of adding types the old fashion way. let s = "Swift is the future" let s:String = "Swift is the future" It's just a matter of making a coding convention.
        • supster 11y ago
          Well you can see that s is a string because of the assignment, and if you want you can also add type annotations like let s: String = "Swift is the future"
• tosseraccount 11y ago
  Why is it "too complex" ? The article mentions that the one "app" apple does use Swift in is a mix of Objc and swift
  • qubex 11y ago
    (Calculator in the standard iOS distribution and some classes of the WWDC app.)