要存储密码，您应该使用钥匙串，特别是 Web 凭据。如果操作正确，这将允许您的应用使用通过 Safari 输入的任何现有钥匙串条目，如果通过您的应用保存，还允许 Safari 访问密码。
下面提供的设置和检索代码：
private let domain = "www.youdomain.com"
func saveWebCredentials(username: String, password: String, completion: Bool -> Void) {
SecAddSharedWebCredential(domain, username, password) { error in
guard error == nil else { print("error saving credentials: \(error)"); return completion(false) }
completion(true)
}
}
func getExistingWebCredentials(completion: ((String, String)?, error: String?) -> Void) {
SecRequestSharedWebCredential(domain, nil) { credentials, error in
// make sure we got the credentials array back
guard let credentials = credentials else { return completion(nil, error: String(CFErrorCopyDescription(error))) }
// make sure there is at least one credential
let count = CFArrayGetCount(credentials)
guard count > 0 else { return completion(nil, error: "no credentials stored") }
// extract the username and password from the credentials dict
let credentialDict = unsafeBitCast(CFArrayGetValueAtIndex(credentials, 0), CFDictionaryRef.self)
let username = CFDictionaryGetValue(credentialDict, unsafeBitCast(kSecAttrAccount, UnsafePointer.self))
let password = CFDictionaryGetValue(credentialDict, unsafeBitCast(kSecSharedPassword, UnsafePointer.self))
// return via completion block
completion((String(unsafeBitCast(username, CFStringRef.self)), String(unsafeBitCast(password, CFStringRef.self))), error: nil)
}
}
这样使用：
// save the credentials
saveWebCredentials("hello", password: "world", completion: { success in
// retrieve the credentials
getExistingWebCredentials { credentials, error in
guard let credentials = credentials else { print("Error: \(error)"); return }
print("got username: \(credentials.0) password: \(credentials.1)")
}
})
更新
建议切换到使用 WKWebView，以便您可以轻松提取响应标头。这是样板代码：
import UIKit
import WebKit
class ViewController: UIViewController, WKNavigationDelegate {
override func viewDidLoad() {
super.viewDidLoad()
let webView = WKWebView(frame: self.view.bounds)
webView.navigationDelegate = self
self.view.addSubview(webView)
webView.loadRequest(NSURLRequest(URL: NSURL(string: "https://www.google.com")!))
}
func webView(webView: WKWebView, decidePolicyForNavigationResponse navigationResponse: WKNavigationResponse, decisionHandler: (WKNavigationResponsePolicy) -> Void) {
// make sure the response is a NSHTTPURLResponse
guard let response = navigationResponse.response as? NSHTTPURLResponse else { return decisionHandler(.Allow) }
// get the response headers
let headers = response.allHeaderFields
print("got headers: \(headers)")
// allow the request to continue
decisionHandler(.Allow);
}
}