把空格去掉

        str4 = @" sfsf dgd dhrt wafawb treghhhghg erg ";

        str5 = [str4 stringByReplacingOccurrencesOfString:@" " withString:@""];

        NSLog(@"str5 = %@",str5);

把空格去掉

        str4 = @" sfsf dgd dhrt wafawb treghhhghg erg ";

        str5 = [str4 stringByReplacingOccurrencesOfString:@" " withString:@""];

        NSLog(@"str5 = %@",str5);