我正在尝试从名为“newString”的字符串中查找特定的url字符串。我使用以下代码来检测链接并将它们保存在名为“matches”的数组中。我感兴趣的特定字符串位于数组的匹配[1]索引:
NSDataDetector* detector = [NSDataDetector dataDetectorWithTypes:NSTextCheckingTypeLink error:nil];
NSArray* matches = [detector matchesInString:newString options:0 range:NSMakeRange(0, [newString length])];
NSLog(@"MATCHES %@", matches[1]);
如何将匹配[1]中的字符串分配给NSString,以便我可以在我的程序中进一步使用它?
答案 0 :(得分:0)
NSString *stringYouWant = [matches objectAtIndex:1];
甚至
NSString *stringYouWant = [[matches objectAtIndex:1] copy];
答案 1 :(得分:0)
在您的代码中
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);
break;
}
}
其他方式是使用NSRegularExpression
。
NSRegularExpression *regex = [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 *match = [someString substringWithRange:[regex rangeOfFirstMatchInString:someString options:NSMatchingCompleted range:NSMakeRange(0, [someString length])]];
NSLog(@"%@", match);
答案 2 :(得分:0)
这些解决方案中有一个适合您吗? 你尝试过另一场比赛(0,2,3,......)吗? 你也可以尝试另一个索引的范围...
NSDataDetector *detector = [NSDataDetector dataDetectorWithTypes:NSTextCheckingTypeLink error:nil];
NSArray *matches = [detector matchesInString:newString options:0 range:NSMakeRange(0, [newString length])];
NSURL *urlYouWant = [[matches objectAtIndex:1] URL];
NSString *stringYouWant = [newString subStringWithRange:[[matches objectAtIndex:1] rangeAtIndex:1]];