Swift - shaps80/Stack中CoreData的一种类型安全、线程安全的方法

Stack Wouldn't it be great to have a type-safe CoreData Stack? Reading let stack = Stack.defaultStack() let query = Query<Person>().sort(byKey: "name", direction: .Ascending).filter("name == %@", name) let results = try! stack.fetch(query) print(results.first?.name) Writing let stack = Stack.defaultStack() stack.write({ (transaction) -> Void in let person = try transaction.fetchOrInsert("name",