let us: Go! 2020 fall https://let-us-go-2020-fall.vercel.app/ https://youtu.be/73IVJfFHDzI?t=12057

1. 송치원 (곰튀김)
iamchiwon.github.io
코드 삼분지계
Realism Programmer
三分之計

2. Code Splitting
Architecture

3. Benefit
1.중복코드 발생
2.코드를 찾기 어려움
3.수정을 빠트리고 적용할 위험
1.코드의 재사용성 증가
2.협업에 용이
3.수정코드를 빠르게 찾아 적용

4. Benefit
1.중복코드 발생
2.코드를 찾기 어려움
3.수정을 빠트리고 적용할 위험
1.코드의 재사용성 증가
2.협업에 용이
3.수정코드를 빠르게 찾아 적용
유지관리
불리
유지관리
유리

5. M V X
Model
Controller
ViewPresenter
ViewModel
역할

6. M V X
Model
Controller
ViewPresenter
ViewModel
역할
아키텍쳐 == 코드의 배치

7. Pure Platform
Dependency

8. Pure Platform
Dependency

9. Pure Platform
삼분지계
Protocol
Inversion
※ let us: Go! 2020 Summer - Inversion

10. Platform
Protocol
Pure
class ViewController: UIViewController, PlatformInterface {
var logic: BusinessLogic
@IBOutlet label: UILabel
@IBOutlet button: UIButton
@objc func onButtonSelected(sender: Any) {
logic.getCurrentTime()
}
func updateTime(time: String) {
label.text = time
}
}
protocol PlatformInterface {
func updateTime(time: String)
}
class BusinessLogic {
var platform: PlatformInterface
func getCurrentTime() {
let time = "(Date())"
platform.updateTime(time: time)
}
}
UIKit

11. Protocol
Pure
class ConsoleApplication: PlatformInterface {
var logic: BusinessLogic
func getTime() {
logic.getCurrentTime()
}
func updateTime(time: String) {
print(time)
}
}
protocol PlatformInterface {
func updateTime(time: String)
}
class BusinessLogic {
var platform: PlatformInterface
func getCurrentTime() {
let time = "(Date())"
platform.updateTime(time: time)
}
}
Platform
Console

12. Protocol
Pure
class Repository: PlatformInterface {
func fetchData(_ callback: @escaping (Data) -> Void) {
URLSession.shared.dataTask(with: URL() ) { (data, _, _) in
callback(data!)
}
}
}
protocol PlatformInterface {
func fetchData(_ callback: @escaping (Data) -> Void)
}
class BusinessLogic {
var platform: PlatformInterface
func handleData() {
platform.fetchData() { data in
// ... handle data
}
}
}
Platform
URLSession

13. Protocol
Pure
class Repository: PlatformInterface {
func fetchData(_ callback: @escaping (Data) -> Void) {
let data = UserDefaults.standard.data(forKey: "DATA")
callback(data!)
}
}
protocol PlatformInterface {
func fetchData(_ callback: @escaping (Data) -> Void)
}
class BusinessLogic {
var platform: PlatformInterface
func handleData() {
platform.fetchData() { data in
// ... handle data
}
}
}
Platform
UserDefaults

14. Protocol
Pure
class NetworkImpl: Network {
func GET(url: URL, callback: @escaping (Data) -> Void) {
URLSession.shared.dataTask(with: url) { (data, _, _) in
callback(data!)
}
}
}
protocol Network {
func GET(url: URL, callback: @escaping (Data) -> Void)
}
class BusinessLogic {
var platform: Network?
func fetchData(urlString: String) {
platform?.GET(url: URL(string: urlString)!) { data in
// ... handle data
}
}
}
Platform
URLSession

15. Protocol
Pure
class NetworkImpl: Network {
func GET(url: URL, callback: @escaping (Data) -> Void) {
AF.request(url).response { response in
callback(response.data)
}
}
}
protocol Network {
func GET(url: URL, callback: @escaping (Data) -> Void)
}
class BusinessLogic {
var platform: Network?
func fetchData(urlString: String) {
platform?.GET(url: URL(string: urlString)!) { data in
// ... handle data
}
}
}
Platform
Alamofire

16. Protocol
Pure
Platform
Alamofire
Platform
Protocol
Pure
UIKit
Protocol
Pure
Platform
Console
Protocol
Pure
Platform
URLSession
Protocol
Pure
Platform
UserDefaults
Protocol
Pure
Platform
CoreData
Protocol
Pure
Platform
Realm
Protocol
Pure
Platform
Mock

17. Platform
Interface
Logic
삼분지계

18. Platform
Interface
Logic
삼분지계
Model
View
ViewModel
Interface

19. Summary
1. 아키텍쳐는 코드의 배치다.
2. 코드 삼분지계
•코드는 외부 의존도가 있느냐를 기준으로 나눈다.
•그 사이에는 프로토콜을 두어 역전시킨다.
•Pure, Interface, Platform
3. MVx 에서 M과 x 는 Pure하게 작성하자

20. END