WKWebView 白屏

项目中遇到的问题

第一种：URL中出现特殊字符 '=' 等，需要编码

let url = URL(string: safeString.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed) ?? "")

第二种：iPhone中打开所有网页都正常，但ipad中打开某些网页正常，某些网页白屏，如https://www.baidu.com就白屏

let config = WKWebViewConfiguration()
config.defaultWebpagePreferences.preferredContentMode = .mobile
let wk = WKWebView(frame: UIScreen.main.bounds, configuration: config)

整体代码：

struct CoscoWebView: UIViewRepresentable {
    typealias UIViewType = WKWebView
    
    let urlString: String?
    
    func makeUIView(context: Context) -> WKWebView {
        
        let config = WKWebViewConfiguration()
        // 不做此配置设置, 大多数网页是可以正常打开的
        // 但对于百度官网，会出现手机可以打开而ipad白屏（不断的在代理方法didStart 和 didFinish之间循环）
        config.defaultWebpagePreferences.preferredContentMode = .mobile
        
        let wk = WKWebView(frame: UIScreen.main.bounds, configuration: config)
        // 设置代理
        wk.navigationDelegate = context.coordinator
        
        return wk
    }
    
    func updateUIView(_ uiView: WKWebView, context: Context) {
        if let safeString = urlString {
            // 路径中出现某些特殊字符（如 = 等...），会返回nil，此处需要编码
            if let url = URL(string: safeString.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed) ?? "") {
                let request = URLRequest(url: url)
                uiView.load(request)
            }
        }
    }
    
    func makeCoordinator() -> Coordinator {
        Coordinator()
    }
}
extension CoscoWebView {
    
    class Coordinator: NSObject, WKNavigationDelegate {
        
        func webView(_ webView: WKWebView, didStartProvisionalNavigation navigation: WKNavigation!) {

        }
        
        func webView(_ webView: WKWebView, didFail navigation: WKNavigation!, withError error: Error) {
            print(error)
        }
        
        func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
            
        }
    }
}

上面第二种问题，有知道原因的麻烦评论区贴一下，互相学习