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objective-cuiwebviewstringbyevaluatingjavascr

Using "stringbyevaluatingjavascriptfromstring" for get the link in <a href='XXXX'> tag in objective C

I have html code like this

<html>
  <head>
  </head>
  <body>
    <a href='001'><img src='chp1.png'/></a>
    <a href='002'><img src='chp2.png'/></a>
</body></html>

I want to get 001 or 002 in by use stringbyevaluatingjavascriptfromstring

like

[self.webView stringByEvaluatingJavaScriptFromString:@""];

have anyone know how to get it

Thx

Solution

  • I don't think -stringByEvaluatingJavaScriptFromString: is a good choice here. Try using an NSScanner:

    NSScanner* scanner = [NSScanner scannerWithString:yourHTML];
while ([scanner scanUpToString:@"a href='" intoString:nil])
{
    [scanner scanString:@"a href='" intoString:nil];
    NSString* result = nil;
    [scanner scanUpToString:@"'" intoString:&result];
    //Do something with result, which will equal 001, then 002, etc.
}

    Note that if you need to parse HTML you didn't write yourself, you'll need to add a lot more flexibility to this to account for possible stylistic differences (e.g. ' vs ", href vs HREF).