Ios 空数据解析数据JSON

当我在浏览器上查看这个（方法的结尾）时，我会看到JSON echo的打印输出

JSON回音

[{"0":"2222","id":"2222","1":"john","first":"john","2":"true","last":"true"},{"0":"35","id":"35","1":"Griffin","first":"Griffin","2":"Peter","last":"Peter"},{"0":"40","id":"40","1":"cameron","first":"cameron","2":"Peter","last":"Peter"},{"0":"22","id":"22","1":"Sqgger","first":"Sqgger","2":"Peter","last":"Peter"},{"0":"900","id":"900","1":"sayo","first":"sayo","2":"nara","last":"nara"},{"0":"9000","id":"9000","1":"sayaaao","first":"sayaaao","2":"nara","last":"nara"},{"0":"9001","id":"9001","1":"sayaaao","first":"sayaaao","2":"nara","last":"nara"}]


//Perform query
    $result = mysqli_query($con,"SELECT * FROM User");

    $myJson=array();
    //Parse to array
    while($row = mysqli_fetch_array($result)){
        $myJson[]=$row;
        //echo $row['first'] . " " . $row['last'];
        //echo "<br />";
    }

    //Close connection
    mysqli_close($con);

    //Encode and send response
    echo json_encode($myJson);

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有什么想法吗？谢谢

您可以发布从服务器获取的json字符串吗？将其添加到第一个代码行您的应用程序是否因exc\u bad\u访问而崩溃？如果没有，请尝试打印[[data objectAtIndex:0]valueForKey:@“id”]。添加有关webData的代码；你把空数据放在JSON上，也许是这样。没有崩溃。。。只是空的。。。

NSArray* data=[NSJSONSerialization JSONObjectWithData:webData options:0 error:&error];
    NSLog(@"name = %@",[data objectAtIndex:0]);//Null