从NSString打印特定值

Question

NSDictionary* headers; = [(NSHTTPURLResponse *)response allHeaderFields];
NSString *str;= [headers objectForKey:@"Www-Authenticate"];
NSLog(@"value:%@",str);

值：急救=“我的服务器部分”，qop =“接受”，nonce =“nyeraAT567WE”

我想要只打印nonce

Answer 1

你需要一个正则表达式来提取它：

NSError *error=nil;

NSRegularExpression *regex = [[NSRegularExpression alloc] initWithPattern:@"nonce=\"(.*)\"" options:0 error:&error];

NSTextCheckingResult *match = [regex firstMatchInString:str options:0 range:NSMakeRange(0, [str length])];

NSString *nonce = [str substringWithRange:[match rangeAtIndex:1]];

NSLog(@"%@",nonce);