键盘上移

- (void)keyboardFrameChange:(NSNotification *)info{
    
   
 1.获取键盘最后的y值
    NSDictionary *keyBoardDict =   info.userInfo;
    CGRect keyBoardFrame = [keyBoardDict[UIKeyboardFrameEndUserInfoKey]CGRectValue];
//    2.设置view的移动的范围
    CGFloat viewH = self.view.frame.size.height;
    CGFloat keyBoardTy = keyBoardFrame.origin.y - viewH;
    CGFloat duration = [keyBoardDict[UIKeyboardAnimationDurationUserInfoKey]doubleValue];
    [UIView animateWithDuration:duration animations:^{
         self.view.transform = CGAffineTransformMakeTranslation(0, keyBoardTy);
    }];
   
    
}