How to hide your navigation bar when the keyboard shows: hidesBarsWhenKeyboardAppears
About 1 min
How to hide your navigation bar when the keyboard shows: hidesBarsWhenKeyboardAppears 관련
UIKit - free Swift example code
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How to hide your navigation bar when the keyboard shows: hidesBarsWhenKeyboardAppears | UIKit - free Swift example code
How to hide your navigation bar when the keyboard shows: hidesBarsWhenKeyboardAppears
Available from iOS 8.0