键盘弹出伴随tableview上移

//MARK: -当键盘出现
- (void)keyboardWillShow:(NSNotification *)notification
{
    CGFloat W = [UIScreen mainScreen].bounds.size.width;
    CGFloat H = [UIScreen mainScreen].bounds.size.height;
    //获取键盘的高度
    NSDictionary *userInfo = [notification userInfo];
    NSValue *value = [userInfo objectForKey:UIKeyboardFrameEndUserInfoKey];
    CGRect keyboardRect = [value CGRectValue];
    _heighh = keyboardRect.size.height;

//    [UIView animateWithDuration:0.25 animations:^{
//        CGFloat toolviewH = H - _heighh - 50 -64 + 2;
//        if (_textHeight>0) {}else{
//            _toolview.frame = CGRectMake(0,toolviewH, W, 50);
//        }
//    }];
    CGFloat toolviewH = H - _heighh - 50 -64 + 2;
    if (_textHeight>0) {}else{
        _toolview.frame = CGRectMake(0,toolviewH, W, 50);
    }
    //2.tableview高度
    self.tableView.contentOffset = CGPointMake(0, self.tableView.contentSize.height -  _heighh +20  );
}

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