-(NSString *)countNumAndChangeformat:(NSString *)num
{
int count = 0;
long long int a = num.longLongValue;
while (a != 0) {
count++;
a /= 10; }
NSMutableString *string = [NSMutableString stringWithString:num];
NSMutableString *newstring = [NSMutableString string];
while (count > 3) {
count -= 3;
NSRange rang = NSMakeRange(string.length - 3, 3);
NSString *str = [string substringWithRange:rang];
[newstring insertString:str atIndex:0];
[newstring insertString:@"," atIndex:0];
[string deleteCharactersInRange:rang];
}
[newstring insertString:string atIndex:0];
return newstring;
}
