+(NSString *) stringDeleteString:(NSString *)str
{  BOOL isOK=YES;
    NSMutableString *str1 = [NSMutableString stringWithString:str];
    
    while (isOK) {
        if ([str1 rangeOfString:@"</p>"].length>0||[str1 rangeOfString:@"<p>"].length>0||[str1 rangeOfString:@" "].length>0) {
            NSRange range=[str1 rangeOfString:@"<p>"];
            if (range.length>0) {
                [str1 deleteCharactersInRange:range];
            }
            NSRange ranges=[str1 rangeOfString:@"</p>"];
            if(ranges.length >0){
                [str1 deleteCharactersInRange:ranges];
            }
            NSRange ranges1=[str1 rangeOfString:@" "];
            if(ranges1.length>0){
                [str1 deleteCharactersInRange:ranges1];
            }
            NSLog(@"***********************************************************+++++++++++++++++++++++++++--------------------------");
        }else{
            isOK=NO;
            break;
        }
        
    }
    NSString *newstr = [NSString stringWithString:str1];
    return newstr;
}