iosobjective-ccore-datansstringencoding

How to generate random string in Objective-C based on core data values

I am developing one iOS application using storyboard and core data. For my application I need to generate one random string like 'M000142140502343524' which are not already exist in the 'data' field of the 'tableA' when click a button.

Solution

  • This will generate the random key

       NSTimeInterval  today = [[NSDate date] timeIntervalSince1970];
    NSString *intervalString = [NSString stringWithFormat:@"%f", today];
    NSDate *date = [NSDate dateWithTimeIntervalSince1970:[intervalString doubleValue]];

    NSDateFormatter *formatter=[[NSDateFormatter alloc]init];
    [formatter setDateFormat:@"yyyyMMddhhmm"];
    NSString *strdate=[formatter stringFromDate:date];