Removing leading zeroes from a string

You can convert string to integer and integer to string if you are number.

Or

Declarate pointer to this string and set this pointer to a start of your string, then iterate your string and add to this pointer number of zeros on the start of string. Then you have pointer to string who starting before zeros, you must use pointer to obitain string without zeros, if you use string you can get string with zeros.

Or

You can reverse string, and iterate it from reverse, if you get some char != '0' you stop iterating else you rewriting this char to null. After it you can reverse string to get back your integer in string without leading zeros.

Use Reguler Expression like this,

 NSString *str =@"000034234247236000049327428900000";
    NSRange range = [str rangeOfString:@"^0*" options:NSRegularExpressionSearch];
    str= [str stringByReplacingCharactersInRange:range withString:@""];
    NSLog(@"str %@",str);

O/P:-str 34234247236000049327428900000