Question

你好我为webservice创建了一个json String，我想输出名称和描述以在NSLog中显示它。我怎样才能做到这一点。到目前为止，我的代码是：

    dic = [NSJSONSerialization JSONObjectWithData:result options:kNilOptions error:nil];


NSLog(@"Results %@",[NSString stringWithFormat:@"%@",[[dic objectForKey:@"d"]objectForKey:@"Name"]]);

我收到此错误：

-[__NSCFString objectForKey:]: unrecognized selector sent to instance 0x6b50f30

当我将NSLog写入我的字典时，我得到了这个：

{
d = "{
\n  \"Name\": \"Apple\",
\n  \"Beschreibung\": \"Steve Jobs ist tot\"}";
}

来自werbservice的我的json字符串如下所示：

string json = @"{
""Name"": ""Apple"",
""Beschreibung"": ""Steve Jobs ist tot""}";

Answer 1

进行这种嵌套日志记录：

NSLog(@"Results %@",[NSString stringWithFormat:@"%@",[[dic objectForKey:@"d"]objectForKey:@"Name"]]);

真的很棘手。我猜测无论返回的对象“d”都不一定是NSDictionary对象，也许是NSArray？

尝试这样的事情：

NSDictionary * dic = [NSJSONSerialization JSONObjectWithData:result options:kNilOptions error:nil];

// this gives the whole NSDictionary output:
NSLog( @"Results %@", [dic description] );

// get the dictionary that corresponds to the key "d"
NSDictionary * dDic = [dic objectForKey: @"d"];
if(dDic)
{
    NSString * nameObject = [dDic objectForKey: @"Name"];
    if(nameObject)
    {
        NSLog( @"object for key 'Name' is %@", nameObject );
    } else {
        NSLog( @"couldn't get object associated with key 'Name'" );
    }
} else {
    NSLog( @"couldn't get object associated with key 'd'") );
}

看看它是否有助于你弄清楚你的假设在哪个级别和哪个对象上。

我如何从json中获取值并在NSLog中显示它们

1 个答案: