NSScreencast Episode #102 Refactoring View Controllers

Refactoring View Controllers - NSScreencast

Twitterのフォロワーを一覧するアプリのリファクタリング

• #import <Social/Social.h>
• viewDidLoad has small lines of code eventually
• refactoring
  • extract to new class
  • extract with new method (completion block etc.)
• Add TwitterAccountStore class
  • requestAccessToAccountsWithType
  • (void (^)(ACAccount account, NSError error))completion
  • TwitterAccountStore.h
    • NS_ENUM(NSInteger, TwitterAccountStoreErrorCodes) {
      • TwitterAccountStoreNoAccountsError = 0,
      • TwitterAccountStoreAccessDeniedError
• Add TwitterAPIClient class
  • extract url (followersURL)
  • extract params (followerParams)
  • (BOOL)successfulStatusCode:(NSInteger)statusCode {
    • return statusCode >= 200 && statusCode < 300;
  • dispatch_async(dispatch_get_main_queue(), ^{
    • completion(followerData[@"users"], nil);
    • completion(nil, jsonError);