问题
I want to write a url extracting function in objective C. The input text can be anything and may or may not contain html anchor tags.
Consider this:
NSString* input1 = @"This is cool site <a href="https://abc.com/coolstuff"> Have fun exploring </a>";
NSString* input2 = @"This is cool site <a target="_blank" href="https://abc.com/coolstuff"> Must visit </a>";
NSString* input3 = @"This is cool site <a href="https://abc.com/coolstuff" target="_blank" > Try now </a>";
I want modified string as "This is cool site https://abc.com/coolstuff
Ignoring all text between anchor tag. And need to consider other attributes like _target in anchor tag
I can do something like
static NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"<a\shref=\"(.*?)\">.*?</a>" options:NSRegularExpressionCaseInsensitive error:nil];;
NSString* modifiedString = [regex stringByReplacingMatchesInString:inputString options:0 range:NSMakeRange(0, [inputString length]) withTemplate:@"$1"];
Works fine with input1 but fails in other cases.
Thanks
回答1:
Try this one:
<a[^>]+href=\"(.*?)\"[^>]*>.*?</a>
回答2:
Or try this one:
<a.+?href="([^"]+)
EXPLAINED
<a
- match opening tag
.+?
- match anything lazily
href="
- match href attribute
([^"]+)
- capture href value
OUTPUT
https://abc.com/coolstuff
https://abc.com/coolstuff
https://abc.com/coolstuff
来源:https://stackoverflow.com/questions/21763865/regular-expression-in-ios-to-extract-href-url-and-discard-rest-of-anchor-tag