在tableview页脚中添加按钮

Question

我在一个viewcontroller中有tableview.我有一节.我想在页脚中添加按钮.我写了这段代码,但页脚视图没有显示.

- (UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section{

    UIView *footerView=[[UIView alloc]initWithFrame:CGRectMake(0, 0, 320, 40)];
    UIButton *addcharity=[UIButton buttonWithType:UIButtonTypeCustom];
    [addcharity setTitle:@"Add to other" forState:UIControlStateNormal];
    [addcharity addTarget:self action:@selector(addCharity:) forControlEvents:UIControlEventTouchUpInside];
    addcharity.frame=CGRectMake(0, 0, 40, 30);
    [footerView addSubview:addcharity];
    return footerView;

}

我还在其委托方法中设置了页脚100的高度.

截图:最初我有3个数据.但是当我搜索特定数据并且结果将在tableview中显示时,我有一个数据,所以那时页脚位置发生了变化.我想在最初的地方修剪页脚.

编辑:

作为替代解决方案,可以通过在末尾添加额外的单元来添加按钮.

Answer 1

根据Apple的Docs,您还必须实施该heightForFooterInSection方法,否则您viewForFooterInSection不会做任何事情.

- (CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section
{
      return 100.0f;
}

- (UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section
{
    if(tableView == myListTableview)  //Here you can make decision 
    {
       UIView *footerView=[[UIView alloc]initWithFrame:CGRectMake(0, 0, 320, 40)];
       UIButton *addcharity=[UIButton buttonWithType:UIButtonTypeCustom];
       [addcharity setTitle:@"Add to other" forState:UIControlStateNormal];
       [addcharity addTarget:self action:@selector(addCharity:) forControlEvents:UIControlEventTouchUpInside];
       [addcharity setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];  //Set the color this is may be different for iOS 7
       addcharity.frame=CGRectMake(0, 0, 130, 30); //Set some large width for your title 
       [footerView addSubview:addcharity];
       return footerView;
    }
}

- (void)addCharity:(id)sender
{
      NSLog(@"add to charity");
}