iPad에서 UIModalPresentationFormSheet 사용시 키보드 내리기

아이패드 작업시 그림1과 같은 모달창에서 키보드를 입력해야 하는 경우가 있습니다.
일반적으로 키보드 작업을 하고 취소오케이를 누르면 키보드도 같이 내려가야 합니다.

iOS Simulator Screen shot 2013. 2. 3. 오전 2.09.01



어라! 하지만 그림2와 같이 키보드가 내려가지 않았습니다.
어떻게 된 것일까요? 저도 삽질 끝에 알아낸 결과라 기록으로 남겨둡니다.

iOS Simulator Screen shot 2013. 2. 3. 오전 2.10.55


Stackoverflow 에서 검색을 해보았더니 의견이 분분하더군요!
심지어는 애플의 버그라고 하시는 분들도 계셨습니다.
하지만 알고 보니 UIViewController 내에 disablesAutomaticKeyboardDismissal 이라는 메소드의 기본 설정값이 YES 여서 발생하는 문제였습니다.
모달로 열리는 창에 disablesAutomaticKeyboardDismissal 메소드를 오버라이드 하시면 문제는 해결됩니다.

예를 들면, 다음과 같이 모달을 호출한다고 가정합니다.

보시다시피 formsheet의 형태로 모달을 호출하게 되며 키보드를 띄우게 될 경우 어김없이 사라지지 않는 문제가 발생하게 됩니다.
해결방법은 모달로 띄우는 컨트롤러 소스안에 다음과 같이 넣어주세요.

이렇게 키보드를 자동으로 사라지기 비활성화하기에서 return을 NO로 해주면 활성화한다는 말이 되기때문에 모든 것이 정상적으로 작동할 것 입니다.
만약, UINavigationController에 얹어서 모달을 띄우시는 경우 UINavigationController의 SubClass로 하나 생성하셔서 그 안에 위와 같이 넣어주시고 호출하시면 됩니다.



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