iOS 开发键盘弹出，tableview上升

-(void)viewWillAppear:(BOOL)animated
{
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWilHide:) name:UIKeyboardWillHideNotification object:nil];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
    
}
-(void)viewWillDisappear:(BOOL)animated
{
    [[NSNotificationCenter defaultCenter] removeObserver:self];

}

-(void)keyboardWilHide:(NSNotification *)note
{
    self.tableview.contentInset = UIEdgeInsetsZero;
}
-(void)keyboardWillShow:(NSNotification *)note
{
    CGRect keyBoardRect = [note.userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];
    self.tableview.contentInset = UIEdgeInsetsMake(0, 0, keyBoardRect.size.height, 0);
    
}