ios - swift : How to set image to label that fits as per label size?

Question

我有以编程方式生成的 UICollectionViewCell。单元格上有标签。

现在，我想将图像设置为单元格上的标签，但该图像应根据单元格的大小调整大小。

下面是使用的代码，但没有用:

 let objImage : UIImage = UIImage(named: "OK")!
 let objCGSize = cell.lblNumber?.frame.size

 UIGraphicsBeginImageContext(objCGSize!)
 objImage.drawInRect(CGRectMake(0, 0, (cell.lblNumber?.frame.size.width)!, (cell.lblNumber?.frame.size.height)!))

 let objNewImage : UIImage = UIGraphicsGetImageFromCurrentImageContext()
            UIGraphicsEndImageContext()

 cell.lblNumber!.text = ""
 cell.lblNumber!.backgroundColor = UIColor(patternImage: objNewImage)

任何其他修复？

我尝试按照某人的建议使用 UIButton 而不是 UILabel。但是这里出现了另一个问题，例如文本对齐，图像未设置..

. . . //Code for UIButton instead of UILabel

cell.btnNumber.setTitle("", forState: .Normal)
    //cell.btnNumber.setImage(UIImage(named: "OK"), forState: .Normal)
 cell.btnNumber.imageView?.image = UIImage(named: "OK")
cell.btnNumber.imageView?.contentMode = UIViewContentMode.ScaleAspectFit

 . . .

Answer 1

func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCellWithReuseIdentifier("hobbiesCell", forIndexPath: indexPath) as! HobbiesTagCell
        self.configureCell(cell, forIndexPath: indexPath)
        return cell
    } 

func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize {
        self.configureCell(self.sizingCell!, forIndexPath: indexPath)
        return self.sizingCell!.systemLayoutSizeFittingSize(UILayoutFittingCompressedSize)
    }
 func configureCell(cell: HobbiesTagCell, forIndexPath indexPath: NSIndexPath) {
        let tag = tags[indexPath.row]
        cell.hobbiesTagName.text = yourArrname[indexPath.item]
    }