如何停止在 UIWebView 中加载图像？

Question

我想用 UIWebView 加载一个 html url，但不要在 html 中加载图像。我希望 UIWebView 只在 html 中显示纯文本。而且由于某种原因，我无法在加载之前更改 html 内容。

有什么方法可以实现吗？

Answer 1

- (NSCachedURLResponse*)cachedResponseForRequest:(NSURLRequest*)request
{
    NSURL *url = [request URL];
    BOOL blockURL = [[FilterMgr sharedFilterMgr] shouldBlockURL:url];
    if (blockURL) {
        NSURLResponse *response =
              [[NSURLResponse alloc] initWithURL:url
                                        MIMEType:@"text/plain"
                           expectedContentLength:1
                                textEncodingName:nil];

        NSCachedURLResponse *cachedResponse =
              [[NSCachedURLResponse alloc] initWithResponse:response
                             data:[NSData dataWithBytes:" " length:1]];

        [super storeCachedResponse:cachedResponse forRequest:request];

        [cachedResponse release];
        [response release];
    }
    return [super cachedResponseForRequest:request];
}

来自this的部分代码

希望对你有帮助

Answer 2

Then remove all image tages using below code then after load your html string into webview


NSString *str =@"<ul><img src=\"some url\"/><li>Tiny pores in leaves or stems, which water and gas can pass. </li><li>Plants can reduce the amount of water that is passed by closing the stomates during the hottest parts of the day or curling their leaves up to reduce exposure.</li></ul>";
    NSLog(@"before--%@",str);
    NSRange r;
    while ((r = [str rangeOfString:@"<img[^>]+>" options:NSRegularExpressionSearch]).location != NSNotFound)
        str = [str stringByReplacingCharactersInRange:r withString:@""];

    NSLog(@"after---%@",str);