getting current time from server on iphone

can i use this in timer like every 1 sec for example it will not put traffic on the network or it will not make the Iphone or application became slow or something

You are downloading the data synchronously, so it will lag the main thread.

You can just transform the data you download into an NSDate object and increment that each second, hence increasing the server time without redownloading.

how we can increment it as i understand i can get the time one time in the application lunch  ans start to increment it every seconds but how i can do this

Look into the NSDateFormatter and NSDate class reference.  If you have code issues, post your code and I can assist with it.

now i tried the code you give to me and when the application start its crash any idea?

thanks very much its working now but i had to use the below code

 

NSData *dataurl =	[NSData dataWithContentsOfURL:[NSURL URLWithString:@"http://example.com"]] ;
	
	
					 NSString *ahmad = [[NSString alloc] initWithData:dataurl encoding:NSUTF8StringEncoding];	

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