UIButton in UITableView cell like "Delete Event"
iphone, uibutton, uitableview
Solution
The way you have it now each time a cell is shown you're allocating a button, setting its value, and adding it to the cell's contentView. When the cell gets reused (via `dequeueReusableCellWithIdentifier`) you'll be creating another new button, adding it to the cell (on top of the old one) etc. The fact that it's gone through `addSubview` but no explicit release means each button's retain count will never go to zero so they'll all stick around. After a while of scrolling up and down the cell will end up with hundreds of button subviews which probably isn't what you want.
A few tips:
Never allocate stuff inside a `cellForRowAtIndexPath` call unless it's done when `dequeueReusableCellWithIdentifier` is returning nil and you're initializing the cell. All other subsequent times you'll be handed back the cached cell that you will have already set up so all you have to do is change the labels or icons. You're going to want to move all that button allocation stuff up inside the `if` conditional right after the cell allocation code.
The button needs to have a position and also a target set for it so it'll do something when tapped. If every cell is going to have this button a neat trick is to have them all point to the same target method but set the button's `tag` value to the `indexPath.row` of the cell (outside the cell allocation block since it varies for each cell). The common tap handler for the button would use the tag value of the sender to look up the underlying data in the dataSource list.
Call `release` on the button after you've done an `addSubview`. That way the retain count will fall to zero and the object will actually get released when the parent is released.
Instead of adding the button via `addSubview`, you can return it as the `accessoryView` for the cell so you don't have to worry about positioning it (unless you're already using the accessoryView for something else -- like disclosure buttons).
Problem
I'd like to add a button to a table cell. The "Delete Event" in the calendar app inspired me... (a similar case is "Share Contact" in contacts) As of now there's ``` - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { //..yadayadayada cell = [tableView dequeueReusableCellWithIdentifier:@"buttonCell"]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:@"buttonCell"] autorelease]; } UIButton *button = [UIButton buttonWithType:UIButtonTypeInfoDark]; [button setBackgroundColor:[UIColor redColor]]; button.titleLabel.text = @"Foo Bar"; [cell.contentView addSubview:button]; ``` which produces a button, indeed. It doesn't look yet how it's supposed to (it's obvious I've never dealt with buttons in iPhone, yet), but is this at least the right approach?