在UICollectionViewCell中对标签应用渐变

import QuartzCore

func applyGradientToLabel() {
    let gradientLayer = CAGradientLayer()
    gradientLayer.frame = label.bounds
    gradientLayer.colors = [UIColor.red.cgColor, UIColor.blue.cgColor] // 渐变颜色数组
    gradientLayer.startPoint = CGPoint(x: 0, y: 0) // 渐变起点
    gradientLayer.endPoint = CGPoint(x: 1, y: 0) // 渐变终点
    label.layer.addSublayer(gradientLayer)
}

override func prepareForReuse() {
    super.prepareForReuse()
    applyGradientToLabel()
}

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Cell", for: indexPath) as! YourCustomCell
    cell.applyGradientToLabel()
    return cell
}