Jun 17, 2015 · Swift needs a convention for saying what the name of a function is, including not only the function name itself (before the parentheses) but also the external names of the …

What is the purpose of writing comments in Swift as: // MARK: This is a comment When you can also do: // This is a comment What does the // MARK achieve?

Sep 20, 2014 · Back in Swift 1.x, print did not add newline characters at the end of the printed string, whereas println did. But nowadays, print always adds the newline character at the end …

Jun 4, 2014 · How to concatenate string in Swift? In Objective-C we do like NSString *string = @"Swift"; NSString *resultStr = [string stringByAppendingString:@" is a new Programming …

One of the Swift Core Team members (I don't remember who that was exactly) said that Swift only has "optional protocol requirements" because it is needed for Obj-C interop. Also, the …

The Swift Docs on Control Flow explain the idea behind that: Using a guard statement for requirements improves the readability of your code, compared to doing the same check with …

Jul 3, 2014 · I like the Swift 3 solution, but it does not work for me in Swift 4: "Cannot use mutating member on immutable value: 'urlQueryAllowed' is a get-only property".

(And in really old Swift versions, could append single elements, not just other collections of the same element type.) There's also insert(_:at:) for inserting at any index. If, say, you'd like a …

Swift has its own Date type. No need to use NSDate. Creating a Date and Time in Swift In Swift, dates and times are stored in a 64-bit floating point number measuring the number of seconds …

i am trying to do an application which can make a timer run in background. here's my code: let taskManager = Timer.scheduledTimer(timeInterval: 10, target: self, selector: #selector(self.