// 获取键盘管理器

YYKeyboardManager *manager = [YYKeyboardManager defaultManager];

// 获取键盘的 view 和 window

UIView *view = manager.keyboardView;

UIWindow *window = manager.keyboardWindow;

// 获取键盘当前状态
BOOL visible = manager.keyboardVisible;
CGRect frame = manager.keyboardFrame;

frame = [manager convertRect:frame toView:self.view];

// 监听键盘动画

[manager addObserver:self];

- (void)keyboardChangedWithTransition:(YYKeyboardTransition)transition {
CGRect fromFrame = [manager convertRect:transition.fromFrame toView:self.view];
CGRect toFrame =  [manager convertRect:transition.toFrame toView:self.view];
BOOL fromVisible = transition.fromVisible;
BOOL toVisible = transition.toVisible;
NSTimeInterval animationDuration = transition.animationDuration;

    UIViewAnimationCurve curve = transition.animationCurve;

}