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Sep 19th, 2019
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  1. func getFriends() {
  2. let numberOfParallel: Int = 2
  3. var completionCount: Int = 0
  4.  
  5. // 呼ばれるたびに 1ずつ足していって並列実行数を超えたら何かのメソッドを呼ぶ
  6. completion = []() {
  7. completionCount += 1
  8. if (numberOfParallel >= comletionCount) {
  9. // 突合する処理など
  10. doSomethingAfterFetchFriends()
  11. }
  12. }
  13.  
  14. // メソッドの内部で終了時に、completionコールバックを呼ぶ
  15. getFollows(completion: completion)
  16. getFollowers(completion: completion)
  17. }
  18.  
  19.  
  20. private func getFollows(completion: @escaping () -> Void) {
  21. doAsyncSomething() {
  22. completion()
  23. }
  24. }
  25.  
  26. private func getFollowers(completion: @escaping () -> Void) {
  27. doAsyncSomething() {
  28. completion()
  29. }
  30. }
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