ios - 当另一个单元格按钮被选中时，将之前的单元格按钮图像设置为默认状态

Question

我想在选择另一个 Cell Button 时将先前选择的 Cell Button 图像更改为默认状态。

默认状态 sender.selected = false 当 Button 未被选中时

按下按钮后 sender.selected = true

func collectionView(collectionView: UICollectionView,
                    cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {

    let cell = collectionView.dequeueReusableCellWithReuseIdentifier(
                   reuseIdentifier, forIndexPath: indexPath) as! RadioCollectionViewCell

    cell.btnPlay.addTarget(self,
        action: Selector("audioControlButtonAction:"),
        forControlEvents: UIControlEvents.TouchUpInside)
    cell.btnPlay.tag = indexPath.row
    return cell
}        

func audioControlButtonAction(sender: UIButton) {

    if sender.selected == false {
        sender.selected = true 
    } else {
        sender.selected = false
    }
}

谁能告诉我我该怎么做？谢谢

Answer 1

var selectIndex:Int = -1

func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell 
{
    let cell = collectionView.dequeueReusableCellWithReuseIdentifier(reuseIdentifier, forIndexPath: indexPath) as! RadioCollectionViewCell

    cell.btnPlay.addTarget(self, action: Selector("audioControlButtonAction:"), forControlEvents: UIControlEvents.TouchUpInside)
    cell.btnPlay.tag = indexPath.row+1

    return cell
}

func audioControlButtonAction(sender: UIButton) 
{
    if selectIndex != -1 && selectIndex != sender.tag
    {
        let bt:UIButton = self.view.viewWithTag(selectIndex) as! UIButton
        if bt.selected == true
        {
            bt.selected = false
        }
    }

    if sender.selected == false
    {
        sender.selected = true
        selectIndex = sender.tag
    }
    else
    {
        sender.selected = false
        selectIndex = -1
    }
 }