I can tell how to do this in objective-c from here, but how can I convert that to swift?
I have a UITableView with custom TableViewCells that has a UIButton called "expandButton". I am trying to figure out how to change the height of that particular cell when the expandButton for that cell is clicked.
Also, when it is clicked again, it should change back to original size. I am not familiar with ObjectiveC so please help me with this in Swift. Thanks a bunch in advance!
Here is what I have so far:
//Declaration of variables as suggested
var shouldCellBeExpanded:Bool = false
var indexOfExpendedCell:NSInteger = -1
Now inside the ViewController. Note: TableViewCell is the name of my custom cell.
//Inside the ViewController
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
if let cell:TableViewCell = TableViewCell() {
cell.stopWatch = stopWatchBlocks[indexPath.row]
cell.expandButton.tag = indexPath.row
//Adding action to the expand button
cell.expandButton.addTarget(self, action: "expandButtonAction1:", forControlEvents: UIControlEvents.TouchUpInside)
return cell
}
}
Now, the button action method:
func expandButtonAction1(button:UIButton) {
button.selected = !button.selected
if button.selected {
indexOfExpendedCell = button.tag
shouldCellBeExpanded = true
self.TableView.beginUpdates()
self.TableView.reloadRowsAtIndexPaths([NSIndexPath(forItem: indexOfExpendedCell, inSection: 0)], withRowAnimation: .Automatic)
self.TableView.endUpdates()
button.setTitle("x", forState: UIControlState.Selected)
}
else if !button.selected {
indexOfExpendedCell = button.tag
shouldCellBeExpanded = false
self.TableView.beginUpdates()
self.TableView.reloadRowsAtIndexPaths([NSIndexPath(forItem: indexOfExpendedCell, inSection: 0)], withRowAnimation: .Automatic)
self.TableView.endUpdates()
button.setTitle("+", forState: UIControlState.Normal)
}
}
And Finally the HeightForRowAtIndexPath
func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
if shouldCellBeExpanded && indexPath.row == indexOfExpendedCell {
return 166.0
}
else { return 91.0 }
}
I think I am missing something because the cell does expand when clicked once, but it does not 'shrink' back to 91 ever!
What am I doing wrong here?
To change the height of tableView cell in ios dynamically, i.e resizing the cell according to the content available, we'll need to make use of automatic dimension property.
yes it is possible, I added the UITableVIew within the UITableView cell .. :) no need to add tableview cell in xib file - just subclass the UITableviewCell and use the code below, a cell will be created programatically.
indexPath(for:)Returns an index path that represents the row and section of a specified table-view cell.
Try not to use the selected tag as a toggle for a cell state such as this. Once a cell is selected, tapping it again will not deselect. Instead, you can just use the shouldCellBeExpanded flag:
func expandButtonAction1(button:UIButton) {
shouldCellBeExpanded = !shouldCellBeExpanded
indexOfExpendedCell = button.tag
if shouldCellBeExpanded {
self.TableView.beginUpdates()
self.TableView.endUpdates()
button.setTitle("x", forState: UIControlState.Normal)
}
else {
self.TableView.beginUpdates()
self.TableView.endUpdates()
button.setTitle("+", forState: UIControlState.Normal)
}
}
Also, from my experience the reloadRowsAtIndexPath method is unnecessary. Using the beginUpdates() and endUpdates() alone should do the trick unless you need custom animation.
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