下载文件WKWebView ios
下载文件WKWebView ios
提问于 2015-12-31 21:26:31
我正在将我的应用程序从UIWebView迁移到WKWebView。当我对它进行更多的修补时，一切都进行得很顺利，并且工作正常。然而，我注意到现在我不能下载论坛附件。
我使用的是HCDownload，到目前为止，它对我来说一直都是完美的，所以我知道它不是在这一端。我相信这是我的要求，但我想不通。
我知道以下几点：
UIWebView => WKWebView Equivalent
--------------------------------------------------------------
didFailLoadWithError => didFailNavigation
webViewDidFinishLoad => didFinishNavigation
webViewDidStartLoad => didStartProvisionalNavigation
shouldStartLoadWithRequest => decidePolicyForNavigationAction因此，鉴于此，我尝试如下：
- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler {
NSURLRequest *request = navigationAction.request;
NSURL *fileURl = [request URL];
NSString *externalFileExtension = [fileURl pathExtension];
NSString *internalFileExtension = [[fileURl absoluteString] pathExtension];
HCDownloadViewController *dlvc = [[HCDownloadViewController alloc] init];
UINavigationController *vc = [[UINavigationController alloc] initWithRootViewController:dlvc];
dlvc.delegate = self;
vc.transitioningDelegate = self;
if (navigationAction.navigationType == WKNavigationTypeLinkActivated) {
//External file extensions
if ([fileExtensions containsObject:[externalFileExtension lowercaseString]]) {
[dlvc downloadURL:fileURl userInfo:nil];
[self presentViewController:vc animated:YES completion:nil];
[vc release];
NSLog(@"externalURL is %@", fileURl);
decisionHandler(WKNavigationActionPolicyCancel);
return;
}
//Internal file links
if ([fileExtensions containsObject:[internalFileExtension lowercaseString]]) {
[self presentViewController:vc animated:YES completion:nil];
[dlvc downloadURL:fileURl userInfo:nil];
[vc release];
NSLog(@"internalURL is %@", fileURl);
decisionHandler(WKNavigationActionPolicyCancel);
return;
}
}它将通过查找文件扩展名来启动我的下载控制器，但它下载的是index.php，而不是文件。
示例url：
https://example.com/index.php?app=core&module=attach§ion=attach&attach_id=1234=example.zip;我做错了什么。它以前在UIWebView中工作得很好，我知道事情是不同的。但是，它怎么能从dropbox上下载一些东西，但是论坛上的一个附件却搞砸了。
任何帮助都将不胜感激
回答 3
Stack Overflow用户
回答已采纳
发布于 2016-01-12 17:58:21
这就是我最终得到的结果，一切似乎都运行得很好。
- (void)webView:(WKWebView *)webView decidePolicyForNavigationResponse:(WKNavigationResponse *)navigationResponse decisionHandler:(void (^)(WKNavigationResponsePolicy))decisionHandler{
NSHTTPURLResponse *response = (NSHTTPURLResponse *)navigationResponse.response;
NSArray *cookies =[NSHTTPCookie cookiesWithResponseHeaderFields:[response allHeaderFields] forURL:response.URL];
for (NSHTTPCookie *cookie in cookies) {
[[NSHTTPCookieStorage sharedHTTPCookieStorage] setCookie:cookie];
}
decisionHandler(WKNavigationResponsePolicyAllow);
//NSLog(@"decidePolicyForNavigationResponse");
}
//Download manager
- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler {
NSURLRequest *request = navigationAction.request;
fileURL = request.URL;
HCDownloadViewController *dlvc = [[HCDownloadViewController alloc] init];
UINavigationController *vc = [[UINavigationController alloc] initWithRootViewController:dlvc];
vc.transitioningDelegate = self;
dlvc.delegate = self;
if (navigationAction.navigationType == WKNavigationTypeLinkActivated) {
//Internal file links
NSString *internalFileExtension = fileURL.absoluteString.pathExtension;
if ([fileExtensions containsObject:[internalFileExtension lowercaseString]]) {
//Fire download
[dlvc downloadURL:fileURL userInfo:nil];
[self presentViewController:vc animated:YES completion:nil];
[vc release];
NSLog(@"internalURL is %@", fileURL);
if (decisionHandler) {
decisionHandler(WKNavigationActionPolicyCancel);
}
return;
}
//External file extensions
NSString *externalFileExtension = fileURL.pathExtension;
if ([fileExtensions containsObject:[externalFileExtension lowercaseString]]) {
//Fire download
[dlvc downloadURL:fileURL userInfo:nil];
[self presentViewController:vc animated:YES completion:nil];
[vc release];
NSLog(@"externalURL is %@", fileURL);
if (decisionHandler) {
decisionHandler(WKNavigationActionPolicyCancel);
}
return;
}
}
if (decisionHandler) {
decisionHandler(WKNavigationActionPolicyAllow);
}
}Stack Overflow用户
发布于 2016-01-05 15:46:50
您可能正在下载一个未经授权的页面，因为您的WKWebView和HCDownload实例不像UIWebView那样共享cookie会话。对于WK2流程模型的速度和安全性改进来说，这是一个必要的权衡。
我通过实现_WKDownloadDelegate来added downloading到我的基于WKWebKit的OSX/Swift迷你浏览器。从El Cap和iOS9开始，这是一个完全没有文档记录的私有协议。它允许你的导航代理调用decisionHandler(_WKNavigationResponsePolicyBecomeDownload)，在给你选择/更改文件名的机会后，WebKit将在后台下载。我还不知道如何在iOS中实现文件选择器，也不知道App Store的审阅者是否会允许使用该协议。但是我的应用程序现在可以正确地处理从像PHP论坛这样的会话身份验证站点的下载。
Stack Overflow用户
发布于 2018-03-21 22:41:35
Swift 4:
ChrisOSX的解决方案也解决了我的问题。登录网站后，我正在尝试从该网站上的链接下载文档。我已经使用WKZombie抓取了链接，然后我想使用Alamofire下载文件。我添加了这个
if let httpResponse = navigationResponse.response as? HTTPURLResponse, let url = httpResponse.url {
let allHeaders = httpResponse.allHeaderFields.reduce([String : String](), { (result, next) -> [String : String] in
guard let stringKey = next.key as? String, let stringValue = next.value as? String else { return result }
var buffer = result
buffer[stringKey] = stringValue
return buffer
})
let cookies = HTTPCookie.cookies(withResponseHeaderFields: allHeaders, for: url)
for cookie in cookies {
HTTPCookieStorage.shared.setCookie(cookie)
}
}至：
func webView(_ webView: WKWebView, decidePolicyFor navigationResponse: WKNavigationResponse, decisionHandler: @escaping (WKNavigationResponsePolicy) -> Void)在此之后，cookies被存储在共享cookies中，我可以使用Alamofire下载文件，而不需要更改下载方法。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/34547161
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