swift4 – 如何将带有对象的数组保存到UserDefaults

My Object符合新的 Swift 4 Codeable协议.如何在UserDefaults中保存这些对象的数组？

struct MyObject: Codeable {
    var name: String
    var something: [String]
}

myObjectsArray = [MyObject]() // filled with objects
UserDefaults.standard.set(myObjectsArray,forKey: "user_filters")

错误

Terminating app due to uncaught exception
‘NSinvalidargumentexception’,reason: ‘Attempt to insert non-property
list object

解决方法

哇,我得到了它的工作：

这是使用可编辑对象保存数组的Swift 4语法：

我的解决方案是将其编码为JSON对象并保存：

static var getAllObjects: [MyObject] {
      let defaultObject = MyObject(name: "My Object Name")
      if let objects = UserDefaults.standard.value(forKey: "user_objects") as? Data {
         let decoder = JSONDecoder()
         if let objectsDecoded = try? decoder.decode(Array.self,from: objects) as [MyObject] {
            return objectsDecoded
         } else {
            return [defaultObject]
         }
      } else {
         return [defaultObject]
      }
   }

 static func saveAllObjects(allObjects: [MyObject]) {
      let encoder = JSONEncoder()
      if let encoded = try? encoder.encode(allObjects){
         UserDefaults.standard.set(encoded,forKey: "user_objects")
      }
 }