Thank you for your response. I have submitted my feedback as follows: FB17957774 (UITextFieldDelegate where the markedTextRange value is always nil when entering Korean text) Best regards,

Thank you for your response. However, I believe it doesn’t fully address the specific issue I was asking about.

Unfortunately, the problem has not been solved. I confirmed that it is a phenomenon that only occurs in this project, and fortunately, it is a learning project, so it does not hurt me much. I wrote the feedback. Thank you for your reply

Thank you for the explanation.

Using Double, Both methods were able to the same results. Thank you