本文介绍了在 UIWebView 上获取 HTTP 响应标头的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着跟版网的小编来一起学习吧！
问题描述
如何从 WebView 获取 HTTP 标头响应?我找到了半解决方案在 Stackoverflow，但它是用 Objective-C 编写的，无法将其转换为 Swift (我已经尝试过使用我糟糕的 Obj-C 知识).
How can I get HTTP headers response from WebView? I've found semi-solutions at Stackoverflow, but it's written on Objective-C and can't convert it to Swift (I've tried with my poor Obj-C knowledge).
Objective-C 代码:
Objective-C code:
- (void)webViewDidFinishLoad:(UIWebView *)webView {
NSCachedURLResponse *resp = [[NSURLCache sharedURLCache] cachedResponseForRequest:webView.request];
NSLog(@"%@",[(NSHTTPURLResponse*)resp.response allHeaderFields]);
}
- 该代码将如何看待 Swift?
- 也许现在我们有更好的方法来做到这一点?缓存并不总是启用.
推荐答案
Swift
Swift 更严格；你想保护自己免受 nil 指针和 optionals:
Swift is more stringent ; you want to protect yourself against nil pointers and optionals:
- 检查
webView是否确实有request - 检查
request是否确实有NSCachedURLResponse - 根据
NSHTTPURLResponse 对响应进行类型检查
- check that the
webViewactually has arequest - check that the
requestactually has aNSCachedURLResponse - type-check the response against
NSHTTPURLResponse
func webViewDidFinishLoad(webView: UIWebView) {
if let request = webView.request {
if let resp = NSURLCache.sharedURLCache().cachedResponseForRequest(request) {
if let response = resp.response as? NSHTTPURLResponse {
print(response.allHeaderFields)
}
}
}
}
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