不同iPhone机型下Spotify Web API认证失败问题排查

问题背景 #

我开发了一款集成Spotify Web API的iOS应用，在iPhone 14 Pro模拟器上测试完全正常，但部署到iPhone 13 Pro Max真机，或者在iPhone 14 Pro Max模拟器运行时都会崩溃。核心问题是不同设备上重定向URL返回的query items不一致。

相关代码 #

提取query items的WKWebView代理函数如下：

func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {
        guard let url = navigationAction.request.url else {
            decisionHandler(.cancel)
            return
        }
    
    //print(self.codeVerifier)
        
        if url.absoluteString.starts(with: redirectURI) {
            if let urlComponents = URLComponents(url: url, resolvingAgainstBaseURL: true),
               let queryItems = urlComponents.queryItems {
                // Extract the authorization code from the query items
                var code: String?
                for item in queryItems {
                    if item.name == "code" {
                        code = item.value
                        break
                    }
                }
                print(queryItems)
                
                // Verify the code verifier
                if let code = code, let storedCodeVerifier = self.codeVerifier, verifyCodeVerifier(storedCodeVerifier) {
                    requestAccessToken(code: code)
                    signOutButton.isHidden = false
                    displayDataButton.isHidden = false
                }
                
                print("hi")
                
                webView.isHidden = true
            }
        }
        
        decisionHandler(.allow)
    }

现象对比 #

• 在iPhone 14 Pro模拟器中，打印的query items符合预期：

[code=AQDYBJnCNU7O17gFSog0aUvM3LjjigPQAMQLDE8q7ucdAZo7arEw1rxdJcysAB7gxhuT_2szj8z6XvnJnsaGomUt0YgvpkGjTnq_Gjr6TMScWmPxlHgPg4Bwy-iflCFq8_gYZlTXjy-WokNjRq0FYmvgVbDcM14c8fqMQ8G32IZnDxfO8GQbcN1bUuSNOVTgrTWvmQOKThHVWiIpOSbAf3hc_CuZvKzBurOi-Rv5KTgGSVKbnWa_tv42JtVpyckDOGkT-z0Wnhyj1Ig8c8jhVEvbcK43fkdDQQMD59aPZ0PPj_0rkBFtGowVxvE]

• 在iPhone 14 Pro Max模拟器中，打印的query items完全不符合预期：

[ar=1, k=6LfCVLAUAAAAALFwwRnnCJ12DalriUGbj8FW_J39,
co=aHR0cHM6Ly9hY2NvdW50cy5zcG90aWZ5LmNvbTo0NDM., hl=en,
v=khH7Ei3klcvfRI74FvDcfuOo, size=invisible, cb=dxrrvlwvv8sx]

疑问 #

请问可能是什么原因导致的？

内容的提问来源于stack exchange，提问作者AwesomeCuber