iOS 处理金额字符串插入逗号

直接调用即可

- (NSString *)hanleNums:(NSString *)numbers{
    NSString *str = [numbers substringWithRange:NSMakeRange(numbers.length%3, numbers.length-numbers.length%3)];
    NSString *strs = [numbers substringWithRange:NSMakeRange(0, numbers.length%3)];
    for (int  i =0; i < str.length; i =i+3) {
        NSString *sss = [str substringWithRange:NSMakeRange(i, 3)];
        strs = [strs stringByAppendingString:[NSString stringWithFormat:@",%@",sss]];
    }
    if ([[strs substringWithRange:NSMakeRange(0, 1)] isEqualToString:@","]) {
        strs = [strs substringWithRange:NSMakeRange(1, strs.length-1)];
    }
    return strs;
}