swift - Implement Alamofire into DDD structure -

qustion

i have following structure

class uitableviewcontroller (presentation) -> class contents(domain) -> class api(infrastructure)

contents class gets raw data via api class , forms contents , passes uitableviewcontroller.

i use alamofire networking in api class.

i’ve looked through stackoverflow , found examples uitableviewcontroller directly accesses api class. direct access presentation layer infrastructure layer should not do. how return value alamofire

how achieve implementing alamofire ddd structure?

i want achieve this

uitableviewcontroller

class mytableviewcontroller: uitableviewcontroller {  var contents: contents?  override func viewdidload() {     super.viewdidload()      let priority = dispatch_queue_priority_default     dispatch_async(dispatch_get_global_queue(priority, 0)) {         // task         self.contents = contents.get("mycontents")         self.tableview.reloaddata()      } } } 

contents

class contents: nsobject {  static func get(contentsname: string) -> contents {     let data = myapi.getrequest("https://xxxx.com/mycontents")      // form contents     let contents = contentsfactory(data)      return contents } } 

api

class myapi: nsobject {  static getrequest(url) -> nsdata {     // , return data using alamofire } } 

you need deal request being run in background, whereas instance of contents returned immediately. in completion handler alamofire request, need call contents instance, call viewcontroller.

therefore contents class needs have completion closure passed on get function, along lines of:

static func get(contentsname: string, completion: (() -> void)?) -> contents { 

this closure have passed down api (or through other techniques), can called when alamofire request completes. also, rather have class method background work, better handled in contents instance create.

then call using:

self.contents = contents.get("mycontents", completion({     dispatch_async(dispatch_get_global_queue(priority, 0)) {         self.tableview.reloaddata()     } }