我正在为用户身份验证系统解析 json。
如果登录成功,服务器将发送以下用户对象;
{
"users": {
"id": "1",
"FB_first_name": null,
"FB_last_name": null,
"FB_gender": null,
"FB_id": null,
"FB_link": null,
"FB_locale": null,
"FB_name": null,
"FB_username": null,
"created_at": "2011-01-02 08:30:59 UTC",
"updated_at": "2011-01-02 08:31:23 UTC",
"email": "<a href="https://stackoverflow.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="9ffefbf2f6f1dfa7edfaefe5b1fcf0f2" rel="noreferrer noopener nofollow">[email protected]</a>",
"language_id": "1"
}
}
我使用以下代码解析它;
NSDictionary *userDic = (NSDictionary*)[(NSDictionary*)results objectForKey:@"users"];
User *aUser = [[User alloc] initWithID:[userDic objectForKey:@"id"]
withUserName:[userDic objectForKey:@"FB_name"]
withUserEmail:[userDic objectForKey:@"email"]
withUserFName:[userDic objectForKey:@"FB_first_name"]];
但是如果用户无效,服务器会发送以下响应;
[
"Invalid Email or Password."
]
我应该使用什么 if()
语句来解析和显示这两种情况下的响应?
最佳答案
//parse out the json data
NSError* error;
id json = [NSJSONSerialization JSONObjectWithData:responseData options:NSJSONReadingMutableContainers error:&error];
if ([json isKindOfClass:[NSArray class]){
//You have to be sure that on error it returns array not a dictionary
NSArray *arr = (NSArray*)json;
NSString *errorMsg = [arr objectAtIndex:0];
}
else {
}
关于objective-c - iOS解析不同json字符串的正确条件,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/13821470/