saving swifty json array to user defaults
问题 i have a json data which gives the following information: let data = [ { "QuestionTitle" : "Entomology is the science that studies", "Id" : 205, "Options" : [ { "Option" : "Insects", "Id" : 810 }, { "Option" : "The origin and history of technical and scientific terms", "Id" : 811 }, { "Option" : "The formation of rocks", "Id" : 812 }, { "Option" : "Behavior of human beings", "Id" : 809 } ] }, { "QuestionTitle" : "A train running at the speed of 60 km\/hr crosses a pole in 9 seconds. What is