请尝试以下代码。
NSError* error;NSDictionary* json = [NSJSonSerialization JSONObjectWithdata:responseData options:kNilOptions error:&error];NSArray* latestLoans = [json objectForKey:@"loans"];NSLog(@"loans: %@", latestLoans);

请尝试以下代码。
NSError* error;NSDictionary* json = [NSJSonSerialization JSONObjectWithdata:responseData options:kNilOptions error:&error];NSArray* latestLoans = [json objectForKey:@"loans"];NSLog(@"loans: %@", latestLoans);