- (int)textLength:(NSString *)text//计算字符串长度

{

    float number = 0.0;

    for (int index = 0; index < [text length]; index++)

    {

        NSString *character = [text substringWithRange:NSMakeRange(index, 1)];

        

        if ([character lengthOfBytesUsingEncoding:NSUTF8StringEncoding] == 3)

        {

            number++;

        }

        else

        {

            number = number + 0.5;

        }

    }

    return ceil(number);

}