How to convert date from server to NSString in ios

Question

I get datetime from server in double and when I convert it to date string in ios, I get error of EXEC_BAD_ACCESS from the first line of code below.

For example,

date string from server: 1426923003

This is how I convert it:

     NSString *dateFromServer = [NSString stringWithFormat:@"%@" ,news.dateCreated];
    NSLog(@"date server: %@",dateFromServer);
    long long theDate = [dateFromServer longLongValue];

    NSTimeInterval interval=theDate;

    NSDate *datenew = [NSDate dateWithTimeIntervalSince1970:interval];
    NSDateFormatter *_formatter=[[NSDateFormatter alloc]init];
    [_formatter setLocale:[NSLocale currentLocale]];
    [_formatter setDateFormat:@"dd-MM-yyyy hh:mm a"];
    dateString=[_formatter stringFromDate:datenew];

I run this codes in method: -(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{} in order to show date on each cell of tableview.

I don't know why it has error like this. How do we make work ? Thank you.

If you treat it as seconds since 1970 `2020270704` IS `Sat, 07 Jan 2034 18:18:24 GMT`. The [current unix timestamp is 1426926406](http://www.epochconverter.com). — Matthias Bauch, Mar 21 '15 at 08:26
You have to figure out what date format the server sends back to you. — Matthias Bauch, Mar 21 '15 at 08:30
And you have to look at the documentation (or the code of the server) to see what this string actually means. Any chance that your conversion from string to number has failed? — Matthias Bauch, Mar 21 '15 at 08:32
I am wrong when I convert date from server , correct timestamp I recieve is 1426923003 that I can convert directly. — malinchhan, Mar 21 '15 at 09:25
news.dateCreated is a string right?? What is the type of news — Sumeet, Mar 21 '15 at 13:39
I create a class "News" that contains all properties and I initial it by using: News *news = [ListOfNews objectAtIndex:indexPath.row]; — malinchhan, Mar 21 '15 at 13:46
I try to get date string like this: NSString *dateFromServer = [NSString stringWithFormat:@"%@" ,news.dateCreated]; — malinchhan, Mar 21 '15 at 13:49
I try to track it, and I see it stops at index 5 ( news = [ListOfNews objectAtIndex:5]; ) — malinchhan, Mar 21 '15 at 16:37
Before index 5, date string is correct. For example : self->news->dateCreated: 1426856404 — malinchhan, Mar 21 '15 at 16:40
At index 5, it gives value: self->news->dateCreated: <_UIFontExtraData: 0x791b2dd0> — malinchhan, Mar 21 '15 at 16:41

score 0 · Accepted Answer · answered Mar 21 '15 at 08:22

0

Date from server contains 13 digits..assign the date to long long instead of double

answered Mar 21 '15 at 08:22

Sumeet

1,055
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18

Did u try `long long`?? – Sumeet Mar 21 '15 at 08:49
server side gives me all in json and this date as string, I don't know how they convert it – malinchhan Mar 21 '15 at 08:53
when I use long long, date number is 2022824320 – malinchhan Mar 21 '15 at 08:55
and by my codes above, it gives result: 06-02-2034 02:38 PM – malinchhan Mar 21 '15 at 08:58
I am wrong when I convert date from server , correct timestamp I recieve is 1426923003 that I can convert directly. – malinchhan Mar 21 '15 at 09:25
When u get from server ul get nsstring 1426923003 right? – Sumeet Mar 21 '15 at 11:27
Then use longlongvalue method of nsstring to extract it to a long long.. Like this – Sumeet Mar 21 '15 at 11:28
Say the string is `serverdate = @"1426923003`… then do the following `long long theDate = [server longlongvalue];` – Sumeet Mar 21 '15 at 11:31
Say the string is `serverdate = @"1426923003`… then do the following `long long theDate = [serverdate longlongvalue];` – Sumeet Mar 21 '15 at 11:34
when I try it, I get signal SIGABRT. I use this code: long long theDate = [news.dateCreated longLongValue]; NSTimeInterval interval=theDate; NSDate *datenew = [NSDate dateWithTimeIntervalSince1970:interval]; NSDateFormatter *_formatter=[[NSDateFormatter alloc]init]; [_formatter setLocale:[NSLocale currentLocale]]; [_formatter setTimeZone:[NSTimeZone localTimeZone]]; [_formatter setDateFormat:@"dd-MM-yyyy hh:mm a"]; dateString=[_formatter stringFromDate:datenew]; – malinchhan Mar 21 '15 at 12:31
Even I change like this: NSString *dateFromServer = news.dateCreated; NSLog(@"date server: %@",dateFromServer); long long theDate = [dateFromServer longLongValue]; NSTimeInterval interval=theDate; – malinchhan Mar 21 '15 at 12:37
Which line do u get d exception – Sumeet Mar 21 '15 at 13:38
news.dateCreated is a string right?? What is the type of news – Sumeet Mar 21 '15 at 13:41
error this line: NSString *dateFromServer = [NSString stringWithFormat:@"%@" ,news.dateCreated]; – malinchhan Mar 21 '15 at 14:36
news.dateCreated is NSString and type of news is NSOBject – malinchhan Mar 21 '15 at 14:37
After I assign double to server date and then long long , now it works without error. Thanks u – malinchhan Mar 22 '15 at 05:54

How to convert date from server to NSString in ios

1 Answers1