Question

我正在创建一个使用3个按钮网格的应用程序。我使用了UICollectionViewController并向UICollectionViewCell添加了按钮还为每个按钮单击事件添加目标下面的代码

override func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
        let cell : CollectionViewCell = collectionView.dequeueReusableCellWithReuseIdentifier(reuseIdentifier, forIndexPath: indexPath) as! CollectionViewCell
        if indexPath.row == 0 {
             cell.btn.addTarget(self, action: "first", forControlEvents: UIControlEvents.TouchUpInside)
             cell.btn.setTitle("1st", forState: .Normal)
        }else if indexPath.row == 1 {
            cell.btn.addTarget(self, action: "second", forControlEvents: UIControlEvents.TouchUpInside)
            cell.btn.setTitle("2nd", forState: .Normal)
        }else if indexPath.row == 2 {            
            cell.btn.addTarget(self, action: "third", forControlEvents: UIControlEvents.TouchUpInside)
            cell.btn.setTitle("3rd", forState: .Normal)
        }
}

每当点击按钮时，视图控制器都会导航到另一个视图控制器代码

var destinationViewController : UIViewController!
func third(){
   destinationViewController = storyboard?.instantiateViewControllerWithIdentifier("AddInventory") as! UIViewController
   navigationController?.pushViewController(destinationViewController, animated: true)
}

但是点击任何按钮导航到同一个视图控制器因为我使用段视图控制器，对于特定索引，将显示不同的视图，所以我必须检查从集合视图中选择了哪个按钮我用标签检查

cell.btn.tag = indexPath.row

但它不起作用我无法访问标记

简而言之，我的问题是如何在推送到另一个视图控制器时检查单击哪个按钮（来自collectionview） Thanx提前

Answer 1

也许这会对你有所帮助：

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

    cell.btn.tag = indexPath.row
    cell.btn.addTarget(self, action: "buttonClicked", forControlEvents: UIControlEvents.TouchUpInside)
}

func buttonClicked(sender: UIButton?) {
    let tag = sender.tag

    let destinationViewController = storyboard?.instantiateViewControllerWithIdentifier("AddInventory") as! DestinationViewController
    destinationViewController.fromTag = tag
    navigationController?.pushViewController(destinationViewController, animated: true)
}

Answer 2

尝试为destinationViewController编写属性。例如showIndex

然后你可以修改你的第三个功能：

func third(){
   destinationViewController = storyboard?.instantiateViewControllerWithIdentifier("AddInventory") as! UIViewController
   destinationViewController.showIndex = 3;
   navigationController?.pushViewController(destinationViewController, animated: true)
}

不清楚我是否清楚地理解你的问题。

Answer 3

    override func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
            let cell : CollectionViewCell = collectionView.dequeueReusableCellWithReuseIdentifier(reuseIdentifier, forIndexPath: indexPath) as! CollectionViewCell
            if indexPath.row == 0 {
                 cell.btn.addTarget(self, action: "first:", forControlEvents: UIControlEvents.TouchUpInside)
cell.tag = indexpath.row
                 cell.btn.setTitle("1st", forState: .Normal)
            }else if indexPath.row == 1 {
                cell.btn.addTarget(self, action: "second:", forControlEvents: UIControlEvents.TouchUpInside)
cell.tag = indexpath.row
                cell.btn.setTitle("2nd", forState: .Normal)
            }else if indexPath.row == 2 {            
                cell.btn.addTarget(self, action: "third:", forControlEvents: UIControlEvents.TouchUpInside)
cell.tag = indexpath.row
                cell.btn.setTitle("3rd", forState: .Normal)
            }
    }

目标用户

func third(sender:UIButton?){
  var tag:Int = sender.tag
   destinationViewController = storyboard?.instantiateViewControllerWithIdentifier("AddInventory") as! UIViewController
   navigationController?.pushViewController(destinationViewController, animated: true)

}

如何知道从另一个视图控制器中的UICollectionViewController按下了哪个按钮

3 个答案: