Arrays in Swift support the += operator to add the contents of one Array to another. Is there an easy way to do that for a dictionary? eg: var dict1 = [“a” : “foo”] var dict2 = [“b” : “bar”] var combinedDict = … (some way of combining dict1 & dict2 without looping) 28 Answers … Read more
The background text in the status bar is still black. How do I change the color to white? // io8, swift, Xcode 6.0.1 override func viewDidLoad() { super.viewDidLoad() self.navigationController?.navigationBar.barTintColor = UIColor.blackColor() self.navigationController?.navigationBar.titleTextAttributes = [NSForegroundColorAttributeName: UIColor.orangeColor()] } 18 Answers 18
How do you import CommonCrypto in a Swift framework for iOS? I understand how to use CommonCrypto in a Swift app: You add #import <CommonCrypto/CommonCrypto.h> to the bridging header. However, Swift frameworks don’t support bridging headers. The documentation says: You can import external frameworks that have a pure Objective-C codebase, a pure Swift codebase, or … Read more
I’d like to map a function on all keys in the dictionary. I was hoping something like the following would work, but filter cannot be applied to dictionary directly. What’s the cleanest way of achieving this? In this example, I’m trying to increment each value by 1. However this is incidental for the example – … Read more
I want to do something in Swift that I’m used to doing in multiple other languages: throw a runtime exception with a custom message. For example (in Java): throw new RuntimeException(“A custom message here”) I understand that I can throw enum types that conform to the ErrorType protocol, but I don’t want to have to … Read more
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. We don’t allow questions seeking recommendations for books, tools, software libraries, and more. You can edit the question so it can be answered with facts and citations. Closed 9 months ago. The community reviewed whether to reopen this question 9 … Read more
I want to leave a bit of space at the beginning of a UITextField, just like here: Add lefthand margin to UITextField But I don’t know how to do that with Swift. 23 Answers 23
It’s possible to add extensions to existing Swift object types using extensions, as described in the language specification. As a result, it’s possible to create extensions such as: extension String { var utf8data:NSData { return self.dataUsingEncoding(NSUTF8StringEncoding, allowLossyConversion: false)! } } However, what’s the best naming practice for Swift source files containing such extensions? In the … Read more
I haven’t read too much into Swift but one thing I noticed is that there are no exceptions. So how do they do error handling in Swift? Has anyone found anything related to error-handling? 13 Answers 13
In Swift 2.0, Apple introduced a new way to handle errors (do-try-catch). And few days ago in Beta 6 an even newer keyword was introduced (try?). Also, knew that I can use try!. What’s the difference between the 3 keywords, and when to use each? 1 Answer 1
