我如何解析html代码！我想在iPhone的HTML代码中获取标签 [英] How do i parser html code! I want get tag in html code for iPhone

问题描述

NSString *str = @"<'html><'img src= 'pic.jpg'/><'/html>";

现在，我想获得 pic.jpg ，

如何搜索字符串？

How can I search the string?

推荐答案

代码依赖于 libxml2 ，它基本上是一个简单的包装器，它为使用Objective C解析html提供了一个更方便的接口。这仅在iOS 3.1.3& 3.2，如果你使用的是OSX，你最好使用WebKit来操纵你的DOM。以下代码可能对您有所帮助。

The code depends on libxml2 and is basically a thin wrapper that provides a more convenient interface for parsing html with Objective C. This has only been tested on iOS 3.1.3 & 3.2, if you're using OSX you're probably better off investigating using WebKit to manipulate your DOM. The following code might help you.

//Example to download google's source and print out the urls of all the images
NSError * error = nil;
HTMLParser * parser = [[HTMLParser alloc] initWithContentsOfURL:[NSURL URLWithString:@"http://www.google.com"] error:&error];
if (error) {
    NSLog(@"Error: %@", error);
    return;
}

HTMLNode * bodyNode = [parser body]; //Find the body tag
NSArray * imageNodes = [bodyNode findChildTags:@"img"]; //Get all the <img alt="" />
for (HTMLNode * imageNode in imageNodes) { //Loop through all the tags
    NSLog(@"Found image with src: %@", [imageNode getAttributeNamed:@"src"]); //Echo the src=""
}

[parser release];

这个Objective C的libxml包装器也可能有用。

This libxml wrapper for Objective C may also be useful.

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