我正在尝试做的是创建一个协议扩展,以从枚举中获取原始值的数组。例如说我有以下内容:
enum TestType: String, EnumIteratable {
case unitTest = "Unit Test"
case uiTest = "UI Test"
}
class EnumIterator: NSObject {
class func iterateEnum<T: Hashable>(_: T.Type) -> AnyGenerator<T> {
var i = 0
return anyGenerator {
let next = withUnsafePointer(&i) { UnsafePointer<T>($0).memory }
return next.hashValue == i++ ? next : nil
}
}
class func getValues<T: Hashable>(_: T.Type) -> [T] {
let iterator = self.iterateEnum(T)
var returnArray = [T]()
for val in iterator {
returnArray.append(val)
}
return returnArray
}
}
如何实现协议EnumIteratable,以便可以调用TestType.getRawValues()并使其返回所有原始枚举值的字符串数组?
谢谢!
您可以添加一个静态属性以返回所有枚举值。例如:
enum RelationshipStatus: String {
case Single = "Single"
case Married = "Married"
case ItsComplicated = "It's complicated"
static let all: [RelationshipStatus] = [.Single, .Married, .ItsComplicated]
}
for status in RelationshipStatus.all {
print(status.rawValue)
}
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