objective c 正则表达式 3

Question

我有一个NSString这样的。

<br /><b>Notice</b>:  Undefined variable: success in <b>/var/www/webservice/gcm/setMessage.php</b> on line <b>1225</b><br /><br />

<b>Warning</b>:  pack(): Type H: illegal hex digit ( in <b>/var/www/webservice/gcm/setMessage.php</b> on line <b>1434</b><br /><br />

<b>Warning</b>:  pack(): Type H: illegal hex digit n in <b>/var/www/webservice/gcm/setMessage.php</b> on line <b>1434</b><br /><br />

<b>Warning</b>:  pack(): Type H: illegal hex digit u in <b>/var/www/webservice/gcm/setMessage.php</b> on line <b>1434</b><br /><br />

<b>Warning</b>:  pack(): Type H: illegal hex digit l in <b>/var/www/webservice/gcm/setMessage.php</b> on line <b>1434</b><br /><br />

<b>Warning</b>:  pack(): Type H: illegal hex digit l in <b>/var/www/webservice/gcm/setMessage.php</b> on line <b>1434</b><br /><br />

<b>Warning</b>:  pack(): Type H: illegal hex digit ) in <b>/var/www/webservice/gcm/setMessage.php</b> on line <b>1434</b><br /><br />

 <b>Notice</b>:  Undefined variable: success in <b>/var/www/webservice/gcm/setMessage.php</b> on line 
    <b>1225</b><br />{"success":1,"success_message":"Edit listing success"}

如何提取此 {"success":1,"success_message":"Edit listing success"} 部分。

Answer 1

只要这是字符串的一般格式，模式 (\{[^}]+\}) 就应该可以。下面是一些帮助您入门的示例代码：

NSString *test = @"<br /><b>Notice</b>:  Undefined variable: success in <b>/var/www/webservice/gcm/setMessage.php</b> on line <b>1225</b><br /><br /><b>Warning</b>:  pack(): Type H: illegal hex digit ( in <b>/var/www/webservice/gcm/setMessage.php</b> on line <b>1434</b><br /><br /><b>Warning</b>:  pack(): Type H: illegal hex digit n in <b>/var/www/webservice/gcm/setMessage.php</b> on line <b>1434</b><br /><br /><b>Warning</b>:  pack(): Type H: illegal hex digit u in <b>/var/www/webservice/gcm/setMessage.php</b> on line <b>1434</b><br /><br /><b>Warning</b>:  pack(): Type H: illegal hex digit l in <b>/var/www/webservice/gcm/setMessage.php</b> on line <b>1434</b><br /><br /><b>Warning</b>:  pack(): Type H: illegal hex digit l in <b>/var/www/webservice/gcm/setMessage.php</b> on line <b>1434</b><br /><br /><b>Warning</b>:  pack(): Type H: illegal hex digit ) in <b>/var/www/webservice/gcm/setMessage.php</b> on line <b>1434</b><br /><br /><b>Notice</b>:  Undefined variable: success in <b>/var/www/webservice/gcm/setMessage.php</b> on line <b>1225</b><br />{\"success\":1,\"success_message\":\"Edit listing success\"}";

NSRegularExpression *regex = [[NSRegularExpression alloc] initWithPattern:@"(\{[^}]+\})" options:0 error:nil];
NSTextCheckingResult *result = [regex firstMatchInString:test options:0 range:NSMakeRange(0, test.length)];
NSString *match = [test substringWithRange:result.range];

NSLog(@"Matched %@", match);

你显然应该更优雅地处理错误，而不是忽略它们。

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