Bit field larger than 64 shifts in Swift?
来源： https://stackoverflow.com/questions/38297160/bit-field-larger-than-64-shifts-in-swift
optionsettype
OptionSetType and enums
问题 I have an enum named ProgrammingLanguage : enum ProgrammingLanguage { case Swift, Haskell, Scala } Now I have a class named Programmer with the following property: let favouriteLanguages: ProgrammingLanguage = .Swift Seeing how a programmer could have several favourite languages, I'd thought it'd be nice to write something like this: let favouriteLanguages: ProgrammingLanguage = [.Swift, .Haskell] After a bit of research, I realized that I need to conform to OptionSetType , but in doing so, I
How to display OptionSet values in human-readable form?
问题 Swift has the OptionSet type, which basically adds set operations to C-Style bit flags. Apple is using them pretty extensively in their frameworks. Examples include the options parameter in animate(withDuration:delay:options:animations:completion:) . On the plus side, it lets you use clean code like: options: [.allowAnimatedContent, .curveEaseIn] However, there is a downside as well. If I want to display the specified values of an OptionSet , there doesn't seem to be a clean way to do it: let
How to display OptionSet values in human-readable form?
Swift has the OptionSet type, which basically adds set operations to C-Style bit flags. Apple is using them pretty extensively in their frameworks. Examples include the options parameter in animate(withDuration:delay:options:animations:completion:) . On the plus side, it lets you use clean code like: options: [.allowAnimatedContent, .curveEaseIn] However, there is a downside as well. If I want to display the specified values of an OptionSet , there doesn't seem to be a clean way to do it: let options: UIViewAnimationOptions = [.allowAnimatedContent, .curveEaseIn] print("options = " + String
OptionSetType and enums
I have an enum named ProgrammingLanguage : enum ProgrammingLanguage { case Swift, Haskell, Scala } Now I have a class named Programmer with the following property: let favouriteLanguages: ProgrammingLanguage = .Swift Seeing how a programmer could have several favourite languages, I'd thought it'd be nice to write something like this: let favouriteLanguages: ProgrammingLanguage = [.Swift, .Haskell] After a bit of research, I realized that I need to conform to OptionSetType , but in doing so, I've raise the following 3 errors: ProgrammingLanguage does not conform to SetAlgebraType OptionSetType
Whats the Swift animate WithDuration syntax?
问题 I'm porting an older app over to Xcode 7 beta and I'm getting an error on my animations: Cannot invoke 'animateWithDuration' with an argument list of type '(Double, delay: Double, options: nil, animations: () -> _, completion: nil)' Here's the code: UIView.animateWithDuration(0.5, delay: 0.3, options: nil, animations: { self.username.center.x += self.view.bounds.width }, completion: nil) This works in Xcode 6 so I'm assuming this is an update in Swift. So my question is: What's the Swift 3