1.正则表达式法。
- NSRegularExpression *expression = [NSRegularExpression regularExpressionWithPattern:@"(?i)//b((?:[a-z][//w-]+:(?:/{1,3}|[a-z0-9%])|www//d{0,3}[.]|[a-z0-9.//-]+[.][a-z]{2,4}/)(?:[^//s()<>]+|//(([^//s()<>]+|(//([^//s()<>]+//)))*//))+(?://(([^//s()<>]+|(//([^//s()<>]+//)))*//)|[^//s`!()//[//]{};:'/".,<>???“”‘’]))" options:NSRegularExpressionCaseInsensitive error:NULL];
- NSString *someString = @"This is a sample of a http://abc.com/efg.php?EFAei687e3EsA sentence with a URL within it.";
- NSString *match = [someString substringWithRange:[expression rangeOfFirstMatchInString:someString options:NSMatchingCompleted range:NSMakeRange(0, [someString length])]];
- NSLog(@"%@", match); // Correctly prints 'http://abc.com/efg.php?EFAei687e3EsA'
2.系统的NSDataDetector
- NSString *string = @"This is a sample of a http://abc.com/efg.php?EFAei687e3EsA sentence with a URL within it.";
- NSDataDetector *linkDetector = [NSDataDetector dataDetectorWithTypes:NSTextCheckingTypeLink error:nil];
- NSArray *matches = [linkDetector matchesInString:string options:0 range:NSMakeRange(0, [string length])];
- for (NSTextCheckingResult *match in matches) {
- if ([match resultType] == NSTextCheckingTypeLink) {
- NSURL *url = [match URL];
- NSLog(@"found URL: %@", url);
- }
- }