1.

- (void)dealloc{    [[NSNotificationCenter defaultCenter] removeObserver:self];}- (void)registerNotification {    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(showKeyboard:) name:UIKeyboardWillShowNotification object:nil];    [[NSNotificationCenter defaultCenter] addObserver:self  selector:@selector(hideKeyboard:) name:UIKeyboardWillHideNotification object:nil];}#pragma mark - keyboard- (void)showKeyboard:(NSNotification *)noti {    NSDictionary *info=[noti userInfo];        NSTimeInterval duration = [info[UIKeyboardAnimationDurationUserInfoKey] doubleValue];    UIViewAnimationOptions options = [info[UIKeyboardAnimationCurveUserInfoKey] unsignedIntegerValue] << 16;        CGRect keyboardRect = [info[UIKeyboardFrameEndUserInfoKey] CGRectValue];    CGFloat keyboardHeight = MIN(CGRectGetWidth(keyboardRect), CGRectGetHeight(keyboardRect));        [UIView animateWithDuration:duration delay:0 options:options animations:^{        CGFloat compareH = self.tableView.contentSize.height -(self.view.height - 45 - 64 - keyboardHeight);        if (compareH >  0) {            if (compareH < keyboardHeight) {                self.tableView.transform = CGAffineTransformMakeTranslation(0, -compareH);            } else {                self.tableView.transform = CGAffineTransformMakeTranslation(0, -keyboardHeight);            }        }                self.bottomView.transform = CGAffineTransformMakeTranslation(0, -keyboardHeight);            } completion:nil];}- (void)hideKeyboard:(NSNotification *)noti {        NSDictionary *info=[noti userInfo];        NSTimeInterval duration = [info[UIKeyboardAnimationDurationUserInfoKey] doubleValue];    UIViewAnimationOptions options = [info[UIKeyboardAnimationCurveUserInfoKey] unsignedIntegerValue] << 16;        [UIView animateWithDuration:duration delay:0 options:options animations:^{                self.tableView.transform = CGAffineTransformIdentity;        self.bottomView.transform = CGAffineTransformIdentity;            } completion:nil];    }