Question

我想从网址获取HTML并使用：

NSString *URLtoHTML = [NSString stringWithContentsOfURL:self.url encoding:NSUTF8StringEncoding error:nil];
[self.webView loadHTMLString:URLtoHTML baseURL:nil];

但在此之后我的cookies在UIWebView中清理。但如果我使用加载请求而没有stringWithContentsOfURL cookies保存：

[self.webView loadRequest:[NSURLRequest requestWithURL:self.url]];

我试过了，但饼干也没有保存：

NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
    [receivedData appendData:data];
    NSString *dataString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
}

如何获取HTML并使用Cookie在UIWebView中加载它？

更新如果我使用这种情况（两个不相关的行）cookie也不能保存：

NSString *URLtoHTML = [NSString stringWithContentsOfURL:self.url encoding:NSUTF8StringEncoding error:nil];
[self.webView loadRequest:[NSURLRequest requestWithURL:self.url]];

即。 stringWithContentsOfURL无法保存Cookie。怎么会这样？这很有趣：D

Answer 1

在这种情况下 - 您从URL下载原始内容，并在WebView中显示此数据。 WebView只是不了解您的cookie。

NSString *URLtoHTML = [NSString stringWithContentsOfURL:self.url encoding:NSUTF8StringEncoding error:nil];
[self.webView loadHTMLString:URLtoHTML baseURL:nil];

在这种情况下 - 您创建连接，但再次只下载原始数据。

NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
    [receivedData appendData:data];
    NSString *dataString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
}

这个更接近，只需要它 - 它从WebView捕获加载的数据。

[self.webView loadRequest:[NSURLRequest requestWithURL:self.url]];
NSString *html = [self.webView stringByEvaluatingJavaScriptFromString: 
                                     @"document.body.innerHTML"];

Answer 2

我的解决方案：

首先，我检查了从服务器获取的Set-Cookie：

NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://www.simple.com/"]];
NSURLConnection *connection = [NSURLConnection connectionWithRequest:request delegate:self];

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
    NSHTTPURLResponse *HTTPResponse = (NSHTTPURLResponse *)response;
    NSDictionary *fields = [HTTPResponse allHeaderFields];
    NSString *cookie = [fields valueForKey:@"Set-Cookie"]; // It is cookie
}

我意识到我有价值，禁用cookie。现在我首先发送启用了cookie的请求：

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://www.simple.com/"]];
[request addValue:myCustomCookies forHTTPHeaderField:@"Cookie"];

我的解决方案2：

我发送带有帖子数据的请求

NSString *post = [NSString stringWithFormat:@"login=%@&passwors=%@",_login.text,_password.text];
        NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
        NSString *postLength = [NSString stringWithFormat:@"%lu",(unsigned long)[postData length]];
        NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
        [request setURL:[NSURL URLWithString:[NSString stringWithFormat:@"http://www.simple.com/login"]]];
        [request setHTTPMethod:@"POST"];
        [request setValue:postLength forHTTPHeaderField:@"Content-Length"];
        [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
        [request setHTTPBody:postData];
        request.timeoutInterval = 20;
        NSURLConnection *conn = [[NSURLConnection alloc]initWithRequest:request delegate:self];

这就是全部！祝大家好运！

在stringWithContentsOfURL之后，cookie不会保存在UIWebView中。 iOS版

2 个答案: