以编程方式设置UIButton的背景不起作用

let button = UIButton()
let image = UIImage(named: "button_background") // 替换为实际的图片名称
button.setBackgroundImage(image, for: .normal)

let button = UIButton()
let image = UIImage(named: "button_background") // 替换为实际的图片名称
let insets = UIEdgeInsets(top: 10, left: 10, bottom: 10, right: 10) // 根据需要自定义边距
let resizableImage = image?.resizableImage(withCapInsets: insets)
button.setBackgroundImage(resizableImage, for: .normal)

let button = UIButton()
let color = UIColor.red // 替换为实际的颜色
let size = CGSize(width: 100, height: 40) // 替换为实际的尺寸
let cornerRadius: CGFloat = 8 // 替换为实际的圆角半径

UIGraphicsBeginImageContextWithOptions(size, false, 0)
let context = UIGraphicsGetCurrentContext()
let path = UIBezierPath(roundedRect: CGRect(origin: .zero, size: size), cornerRadius: cornerRadius)
context?.addPath(path.cgPath)
context?.setFillColor(color.cgColor)
context?.fillPath()

let image = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()

button.setBackgroundImage(image, for: .normal)