如何增加 activity 指标的大小

Question

我是 IOS 开发的新手。我创建了一个 UIWebView.

当应用程序启动时，我实现了加载器。

现在我希望加载器的尺寸更大一些，并带有一些背景图片。

我的代码是这样的：

    private var loadingObservation: NSKeyValueObservation?

    private lazy var loadingIndicator: UIActivityIndicatorView = {
        let spinner = UIActivityIndicatorView()
        spinner.translatesAutoresizingMaskIntoConstraints = false

        spinner.color = .black

        return spinner
    }()

override func viewDidLoad() {
        super.viewDidLoad()

        loadingObservation = webView.observe(\.isLoading, options: [.new, .old]) { [weak self] (_, change) in
            guard let strongSelf = self else { return }

            // this is fine
            let new = change.newValue!
            let old = change.oldValue!

            if new && !old {
                strongSelf.view.addSubview(strongSelf.loadingIndicator)
                strongSelf.loadingIndicator.startAnimating()
                NSLayoutConstraint.activate([strongSelf.loadingIndicator.centerXAnchor.constraint(equalTo: strongSelf.view.centerXAnchor),
                                             strongSelf.loadingIndicator.centerYAnchor.constraint(equalTo: strongSelf.view.centerYAnchor)])
                strongSelf.view.bringSubviewToFront(strongSelf.loadingIndicator)
            }
            else if !new && old {
                strongSelf.loadingIndicator.stopAnimating()
                strongSelf.loadingIndicator.removeFromSuperview()
            }
        }


        let myURL = URL(string: "http://192.168.1.4:8080")
        let myRequest = URLRequest(url: myURL!)
        webView.load(myRequest)


    }

通过这段代码我得到这样的结果：

有没有 IOS 方面的专家可以帮助我解决这个问题。

我想增加 Loader 的大小。对此非常感谢任何帮助。谢谢

Answer 1

您可以尝试设置loadingIndicator.transform = CGAffineTransform.init(scaleX: 2, y: 2)

Answer 2

extension 的 UIActivityIndicatorView -

extension UIActivityIndicatorView {
    func scaleIndicator(factor: CGFloat) {
        transform = CGAffineTransform(scaleX: factor, y: factor)
    }
}

然后可以从任何地方的 UIActivityIndicatorView 对象访问 scaleIndicator() 方法 -

activityIndicatorView.scaleIndicator(factor: 2.5)

如何增加 activity 指标的大小

How to increase the size of the activity indicator

xcode

loader

ios

swift