如何强制按钮停留在tableView单元格的底部？

Question

I add a button as a subview to my tableviewcells. Works fine. But I can't seem to figure out, how to force it to always be at the bottom of the cell. (On top of the separator line if you will). The cell height varies, so a fixed position is not smart. But I have no clue how to add it with a dynamic position. Here's the code for adding the button:

UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button addTarget:self
    action:@selector(buttonPressed:)
    forControlEvents:UIControlEventTouchDown];
    [button setTitle:@"+1" forState:UIControlStateNormal];
    button.frame = CGRectMake(0.0f, 70.0f, 160.0f, 15.0f);
    [cell addSubview:button];

Answer 1

您可以随时检查单元格的高度，并按下这样的按钮框架。

button.frame=CGRectMake(0,cellHeight-15,160,15);

Answer 2

Set the autoresizing mask when adding the button. I think the setting you want is:

button.autoresizingMask = UIViewAutoResizingFlexibleTopMargin;

Do this after adding the button to the cell.