Swift - 在两个不同的文件中声明结构

Question

我刚接触 Swift，遇到了一些问题...

我有一个类可以帮助我获取一些结果

class ExpencesOperations {

struct ExpencesByDate {
    var day: String!
    var expence: [PFObject]
}

var expencesByDateArray = [ExpencesByDate]()

   func getExpencesByDate(expences: [PFObject]) ->  [ExpencesByDate] {
   .....  my function
          return expencesByDateArray
   }
}

当我在 TableViewController 中调用它时，我不知道如何重新声明结构 ExpencesDate!

class HomeTableViewController: UITableViewController {

var myCurrency = MyCurrency()
var expencesOperations = ExpencesOperations()
var expencesByDateArray = [ExpencesOperations.ExpencesByDate]() /* Not Working */

func fetchExpences() {
   expencesByDateArray = self.expencesOperations.getExpencesByDate(someInput) /* here i get the error */
}

Answer 1

将结构放在类范围之外，它也应该对其他文件可见。

struct ExpencesByDate {
    var day: String!
    var expence: [PFObject]
}


class ExpencesOperations {

   var expencesByDateArray = [ExpencesByDate]()

   func getExpencesByDate(expences: [PFObject]) ->  [ExpencesByDate] {
   .....  my function
          return expencesByDateArray
   }
}