回答編集履歴
1
UIAlertController の宣言を追加
test
CHANGED
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@@ -12,6 +12,8 @@
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```
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+
let alert = UIAlertController(title: "正解!", message: "おめでとう", preferredStyle: .alert)
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+
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let okAction = UIAlertAction(title: "OK", style: .default, handler: { (action) in
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alert.dismiss(animated: true, completion: nil)
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