NSString *str_price = [self deleteFloatAllZero:self.str_total];

-(NSString*)deleteFloatAllZero:(NSString*)string
{
    NSArray * arrStr=[string componentsSeparatedByString:@"."];
    NSString *str=arrStr.firstObject;
    NSString *str1=arrStr.lastObject;
    while ([str1 hasSuffix:@"0"]) {
        str1=[str1 substringToIndex:(str1.length-1)];
    }
    return (str1.length>0)?[NSString stringWithFormat:@"%@.%@",str,str1]:str;
}