class TodoList { class var sharedInstance : TodoList { struct Static { static let instance : TodoList = TodoList() } return Static.instance } }这是Swift1.2之前单例的实现方式,Swift1.2中添加了对static let和static var这样存储类变量的支持,当前Swift单例设置的最佳实践之一是:
class MyManager { private static let sharedInstance = MyManager() class var sharedManager : MyManager { return sharedInstance } }原文链接:/swift/325909.html