获得系统当前时间 NSDateFormatter*nsdformatter=[[[NSDateFormatteralloc]init]autorelease]; [nsdformattersetDateStyle:NSDateFormatterShortStyle]; [nsdformattersetDateFormat:@"YYYY-MM-dd HH:mm:ss"]; NSString*timer=[nsdformatterstringFromDate:[NSDatedate]]; NSLog(@"当前时间%@",timer);