ios - Filter searchText to tableView -

right using following

let data = ["new york, ny", "los angeles, ca" . . .]  var filtereddata: [string]!  filtereddata = data 

but want use firebase, identical structure, using this

var data = [categories]() 

(this categories)

struct categories {  let key:string! let content:string! let itemref:firdatabasereference?  init (content:string, key:string = "") {     self.key = key     self.content = content     self.itemref = nil }  init (snapshot:firdatasnapshot) {     key = snapshot.key     itemref = snapshot.ref      if let categoriescontent = snapshot.value!["content"] as? string {         content = categoriescontent     } else {         content = ""     } } 

}

so when search these lines supposed filter out aren't correct

func searchbar(searchbar: uisearchbar, textdidchange searchtext: string) {      // unhide tableview, changed method     tableview.hidden = false      filtereddata = searchtext.isempty ? data : data.filter({(datastring: string) -> bool in         // if dataitem matches searchtext, return true include         return datastring.rangeofstring(searchtext) != nil     })      tableview.reloaddata() } 

but since filter({(datastring: string) takes strings not work

question : there other way replace string firebase struct?

thanks lot!

this tutorial clear in uisearchresultsupdating , filtering section.