把在Cell上面建立的控制元件放在Cell==nil的判斷裡面，這樣，每次進來就會先判斷有沒有，就可以避免資料重複建立，導致檢視越蓋越厚

if (cell==nil) {

            cell=[[UITableViewCellalloc]initWithStyle:UITableViewCellStyleDefaultreuseIdentifier:cellIDD];

self.inviteLabel=[[UILabelalloc]initWithFrame:CGRectMake(10,5,[UIScreenmainScreen].bounds.size.width-20,120

            self.inviteLabel.numberOfLines=0;

            self.inviteLabel.text=cell_info.title;

            self.inviteLabel.textColor=LABEL_TEXTCOLOR;

            int width=100;

            int height=40;

            self.button=[[UIButton alloc]initWithFrame:CGRectMake([UIScreen mainScreen].bounds

self.button.backgroundColor=[UIColorredColor];

            [self.buttonsetBackgroundImage:[UIImageimageNamed:cell_info.cp] forState:UIControlStateNormal];

            NSLog(@"cell_info.cp:%@",cell_info.cp);

            //增加長按手勢

UILongPressGestureRecognizer *longPress=[[

            [self.inviteLabel addGestureRecognizer:longPress];

            longPress.minimumPressDuration=1.0;

            [cell.contentView addSubview:self.button];

            [cell.contentView addSubview:self.inviteLabel];

            cell.backgroundColor=CELL_BACK_COLOR;

        }