swift - 如何使单元格具有渐变背景？
<p><p>我在 ViewController 上插入了一个表格 View ，我想知道如何为表格 View 中的单元格提供渐变背景？我可以单独编辑每个单元格，为每个单元格赋予不同的颜色渐变背景吗？例如，每个单元格都在 <code>trainingLevels</code> 数组中的索引之后标记，我如何才能使每个单元格具有不同的颜色渐变背景？</p>
<p>这是我的代码:</p>
<pre><code>import UIKit
class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
var trainingLevels = ["Ball Handling", "Shooting", "Defense", "Advanced Drills", "Vertimax Drills", "Full Workouts", "BHB Products"]
@IBOutlet weak var tableView: TableView!
func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
cell.backgroundColor = UIColor.clear
}
public func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int
{
return trainingLevels.count
}
public func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell
{
let cell = UITableViewCell(style: UITableViewCellStyle.default, reuseIdentifier: "bell")
cell.textLabel?.text = trainingLevels
//cell details
cell.backgroundColor = UIColor.black
cell.textLabel?.textColor = UIColor.white
return cell
}
override func viewDidLoad() {
super.viewDidLoad()
tableView.delegate = self
tableView.dataSource = self
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
</code></pre></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>您可以创建 UIView 的扩展:</p>
<pre><code>extension UIView{
func addGradientBackground(firstColor: UIColor, secondColor: UIColor){
clipsToBounds = true
let gradientLayer = CAGradientLayer()
gradientLayer.colors =
gradientLayer.frame = self.bounds
gradientLayer.startPoint = CGPoint(x: 0, y: 0)
gradientLayer.endPoint = CGPoint(x: 0, y: 1)
print(gradientLayer.frame)
self.layer.insertSublayer(gradientLayer, at: 0)
}
}
</code></pre>
<p>在你的牢房里:</p>
<pre><code>override func awakeFromNib() {
super.awakeFromNib()
self.addGradientBackground(firstColor: .green, secondColor: .blue)
}
</code></pre></p>
<p style="font-size: 20px;">关于swift - 如何使单元格具有渐变背景？，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/51448584/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/51448584/
</a>
</p>
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