创建一个自定义视图,其中包含UILmage内部的UILmage(在图像底部)

override init(frame: CGRect) {
    super.init(frame: frame)
    setupView()
}

required init?(coder: NSCoder) {
    fatalError("init(coder:) has not been implemented")
}

func setupView() {
    let imageView = UIImageView(image: UIImage(named: "image"))
    imageView.contentMode = .scaleAspectFill
    imageView.clipsToBounds = true
    imageView.frame = CGRect(x: 0, y: 0, width: frame.width, height: frame.height)
    
    addSubview(imageView)
}

override func viewDidLoad() {
    super.viewDidLoad()
    
    let imageName = "image.png"
    let image = UIImage(named: imageName)
    let imageView = UIImageView(image: image)
    imageView.contentMode = .scaleAspectFill
    imageView.clipsToBounds = true
    imageView.frame = CGRect(x: 0, y: 0, width: view.bounds.width, height: view.bounds.height)
    
    addSubview(imageView)
    
    // ... 其他代码
}

override func viewWillLayoutSubviews() {
    super.viewWillLayoutSubviews()
    
    let imageView = subviews.first(where: { $0 is UIImageView }) as! UIImageView
    let width = view.bounds.width
    let height = view.bounds.height
    let x = (width - imageView.frame.size.width) / 2
    let y = (height - imageView.frame.size.height) / 2
    
    imageView.frame = CGRect(x: x, y: y, width: imageView.frame.size.width, height: imageView.frame.size.height)
}

override func viewDidLayoutSubviews() {
    super.viewDidLayoutSubviews()
    
    let imageView = subviews.first(where: { $0 is UIImageView }) as! UIImageView
    let width = view.bounds.width
    let height = view.bounds.height
    let x = (width - imageView.frame.size.width) / 2
    let y = (height - imageView.frame.size.height) / 2
    
    imageView.frame = CGRect(x: x, y: y, width: imageView.frame.size.width, height: imageView.frame.size.height)
}