objective-c - JSONKit NSDictionary

Question

我在JSONkit.h使用中遇到问题NSDictionary。使用它的正确方法是什么？

杰森：

[{"id":"1100","name":"John Stuart"}]

代码：

- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
    NSDictionary *jsonData = [responseData objectFromJSONData];
    NSString *name = [jsonData objectForKey:@"name"];
    NSLog(@"Name: %@", name);
}

错误：

** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[JKArray objectForKey:]: unrecognized selector sent to instance 0x84b9b30'

Answer 1

您的 JSON 是一个数组，但您的代码假定它是一个字典并尝试调用-objectForKey:它。您可能想尝试以下方法：

- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
    NSArray *jsonData = [responseData objectFromJSONData];
    for (NSDictionary *dict in jsonData) {
        NSString *name = [dict objectForKey:@"name"];
        NSLog(@"Name: %@", name);
    }
}