How to allow the Horizontal scrollview to scroll to the first element in IOS?

I had a scrollview in my application with dynamic elements which i am adding from right to left like this

if(array.count>0)
    {
          [[cell.contentView viewWithTag:777] removeFromSuperview];

    float x=315.0;
    float width=0.0;
    UIScrollView *scroll = [[UIScrollView alloc] initWithFrame:CGRectMake(70, 52,245,20)];
    scroll.backgroundColor=[UIColor clearColor];
    scroll.tag=777;
    [scroll setContentOffset:CGPointMake(70,245)];
    scroll.showsHorizontalScrollIndicator=NO;

    for(int i =0; i <[array count] ; i++)
    {

        UIButton *btn=[UIButton buttonWithType:UIButtonTypeCustom];

        [btn setBackgroundColor:[UIColor colorWithRed:133.0/255.0 green:155.0/255.0 blue:179.0/255.0 alpha:1.0]];
        btn.layer.cornerRadius = 2;


        [btn setTitle:[[array objectAtIndex:i] objectForKey:@“ggg”] forState:UIControlStateNormal];
        btn.userInteractionEnabled=NO;
        [btn.titleLabel setFont:[UIFont fontWithName:@"Helvetica Neue" size:10.0]];
       CGSize size = [btn.titleLabel.text sizeWithAttributes:
        @{NSFontAttributeName:
              [UIFont fontWithName:@"Helvetica Neue" size:10.0]}];
        x=x-(size.width+10);

        //or whatever font you're using
        [btn setFrame:CGRectMake(x,0,size.width+10,15)];
        [scroll addSubview:btn];
         width=width+x;
         x=x-5;
    }

       scroll.contentSize=CGSizeMake((width+5000),20);
        // [scroll setPagingEnabled:YES];
    [cell.contentView addSubview:scroll];

}

here everything working very fine,but i am not able to scroll to the last element added at the left.scroll was only allowing me to scroll up to 70 from left to right .Can anybody tell me where i am going wrong on this?