Question

我正在使用下面的json方法和以下代码来解析json方法并在标签上显示我需要的数据。我跟着这个链接http://www.touch-code-magazine.com/tutorial-fetch-and-parse-json/和许多其他链接，但我没有得到我需要的结果。它在下面的代码行中抛出异常，否则它显示空值。

NSDictionary* profile = [profileinfo objectAtIndex:0]; //throws exception

任何人都可以帮我解决下面的代码中出现的问题以及缺少的内容，以便获得json方法中的值，即phonenumber，firstname和其他数据。

//Json Method

{

"createdBy":"superadmin",
"createdOn":"2011-11-15T00:49:06+05:30",
"updatedBy":"superadmin",
"updatedOn":"2011-11-15T00:49:06+05:30",
"contactNumber":"9945614074",
"emailNotification":"true",
"firstName":"resident2",
"lastName":"user5",
"loginId":"jin",
"married":"false",
"message":"",
"preferredLanguage":"ko_KR",
"sex":"0",
"smsNotification":"false",
"status":"ACTIVE",
"subscribedPlans":"Intelligent Concierge",
"userName":"Cisco"

}

//code

- (void)loadData

{

 dataWebService = [[NSMutableData data] retain];


NSURLRequest *request = [[NSURLRequest requestWithURL:[NSURL URLWithString:@"URL LINK"]]retain];  

[[NSURLConnection alloc]initWithRequest:request delegate:self];

}


-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{


[connection release];    
NSString *responseString = [[NSString alloc] initWithData:dataWebService encoding:NSUTF8StringEncoding];

self.dataWebService = nil;

NSArray* profileinfo = [(NSDictionary*) [responseString JSONValue] objectForKey:@"createdBy"]; 
[responseString release];    

NSDictionary* profile = [profileinfo objectAtIndex:0];

//fetch the data
NSNumber* numb = [profile objectForKey:@"contactNumber"];

NSString* name = [profile objectForKey:@"firstName"];

//set the text to the label
label.numberOfLines = 0;
label.text = [NSString stringWithFormat:@"contactNumber: %@ \n \n Name:  %@ \n \n",
             numb,name];

}

Answer 1

jsonValue是你的字典。

替换

NSArray* profileinfo = [(NSDictionary*) [responseString JSONValue] objectForKey:@"createdBy"];

和

NSDictionary* profile = [profileinfo objectAtIndex:0];

带

NSDictionary * profile =  (NSDictionary*)[responseString JSONValue];

现在使用objectForKey来获取值

解析json和显示数据的问题

1 个答案: