ios - Collection View 内的按钮不会在点击时突出显示

Question

我在 Collection View 中有一个按钮，但与应用程序周围的其他按钮不同，当您点击它时，它不会突出显示。我已经尝试了一些建议的事情，例如在按钮上打开 Shows Touch on Highlight，并将 delaysContentTouches 设置为 false。

func createCollectionView() {
        let layout: UICollectionViewFlowLayout = UICollectionViewFlowLayout()
        layout.sectionInset = UIEdgeInsets(top: 15, left: 10, bottom: 10, right: 10)
        layout.itemSize = CGSize(width: view.frame.width, height: 50)

        cv = UICollectionView(frame: view.frame, collectionViewLayout: layout)
        cv.frame = CGRectMake(0, 50, view.frame.width, 250);
        cv.dataSource = self
        cv.delegate = self
        cv.registerNib(UINib(nibName: "cvCell", bundle: nil), forCellWithReuseIdentifier: "cell")
        cv.backgroundColor = UIColor.whiteColor()

        //suggested on other SO answers:
        cv.delaysContentTouches = false

        for view in cv.subviews {
            if view is UIScrollView {
                (view as? UIScrollView)!.delaysContentTouches = false
                break
            }
        }
    } 


//Button:
var onTap: ((cvCell) -> Void)?
    @IBAction func btn(sender: AnyObject) {
        onTap?(self)
    }

//CollectionView select:
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
   let cell = collectionView.dequeueReusableCellWithReuseIdentifier("cell", forIndexPath: indexPath) as! cvCell
  cell.btn.setTitle("follow", forState: .Normal)
}

有什么想法吗？

Answer 1

如果您的按钮类型是 cell.btn.buttonType == UIButtonType.system 则它会自动突出显示按钮标题上的效果。否则 cell.btn.buttonType == UIButtonType.custom 比你需要给自己的高亮效果。