IOS开发篇UI之重用scrollView

   int n = 3;
    int m = 0;
    if (self.withimage == self.allarr.count - 1 || self.withimage == 0) {
        n = 2;
    }
    //如果只有一张图片
    if(self.allarr.count == 1)
    {
        self.addscroll = [[addTapandImageGToScroll alloc] initWithFrame:CGRectMake(WIDTH, 0, WIDTH, HEIGHT)];
        UIImage * image = self.allarr[self.withimage];
        self.addscroll.iamgeV.frame = self.frame;
        NSLog(@"%@",NSStringFromCGRect(self.frame));
        [self.Scroller addSubview:self.addscroll];
        [UIView animateWithDuration:1 animations:^{
            CGSize imagesize = image.size;
            double pror = WIDTH/imagesize.width;
            self.addscroll.iamgeV.frame = CGRectMake(0, (HEIGHT - pror * HEIGHT)/2, WIDTH, pror * HEIGHT);
        }];
    }
    for (int i = 0; i < n; i ++)
    {
        self.addscroll = [[addTapandImageGToScroll alloc] initWithFrame:CGRectMake(WIDTH * i, 0, WIDTH, HEIGHT)];
        UIImage * image ;
        if (self.withimage == 0) {
            image = self.allarr[self.withimage + i];
        }
        else
        {
            image = self.allarr[self.withimage - 1 + i];
        }

        NSLog(@"++++++++++++++++++++++%d",self.withimage - 1 + i);
        self.addscroll.iamgeV.tag = i;
        self.addscroll.iamgeV.image = image;
        int s;
        if (self.withimage == 0) {
            s = 0;
        }
        else
        {
            s = 1;
        }
        
        if (i == s && firstShowAnimateimage == 0) {
            self.addscroll.iamgeV.frame = self.frame;
            NSLog(@"%@",NSStringFromCGRect(self.frame));
            [self.Scroller addSubview:self.addscroll];
            [UIView animateWithDuration:1 animations:^{
                CGSize imagesize = image.size;
                double pror = WIDTH/imagesize.width;
                self.addscroll.iamgeV.frame = CGRectMake(0, (HEIGHT - pror * HEIGHT)/2, WIDTH, pror * HEIGHT);
            }];
            firstShowAnimateimage = firstShowAnimateimage + 1;
        }
        else
        {
            [self.Scroller addSubview:self.addscroll];
            CGSize imagesize = image.size;
            double pror = WIDTH/imagesize.width;
            self.addscroll.iamgeV.frame = CGRectMake(0, (HEIGHT - pror * HEIGHT)/2, WIDTH, pror * HEIGHT);
        }
      
        //设置下面的属性
        self.addscroll.userInteractionEnabled = YES;
        self.addscroll.iamgeV.userInteractionEnabled = YES;
        //设置点击一次事件
        self.addscroll.block = ^(addTapandImageGToScroll *add)
        {
            if (tapnumber == 0)
            {
                weakself.viewBack.hidden = NO;
                tapnumber = 1;
            }
            else
            {
                weakself.viewBack.hidden = YES;
                tapnumber = 0;
            }
        };
    }
    
    self.Scroller.contentSize = CGSizeMake(WIDTH * (n - m), 0);
    NSLog(@"%d",self.index);
    if (self.withimage == 0) {
        self.Scroller.contentOffset = CGPointMake(0, 0);
    }
    else
    {
        self.Scroller.contentOffset = CGPointMake(WIDTH * 1, 0);
    }

    self.nowimagedex = 2;
    saveimage = self.allarr[self.withimage];
    [self addSome];
    
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
{
    //关于手势
    tapnumber = 0;
    
    if (self.allarr.count == 1) {
        return;
    }
    
    int page = (scrollView.contentOffset.x)/scrollView.frame.size.width;
    NSLog(@"%d",page);
    
    if (self.withimage == 0 && page == 0) {
        return;
    }
    
    self.nowimagedex = page;
    self.labeltitle.text = self.allname[ page];
    [self.labeltext setDefaultStyleBy:self.alltext[page]];
    CGFloat height = [self.labeltext heightForStringByWidth:WIDTH];
    self.scrollText.contentSize = CGSizeMake(0, height);
    if (height+60>HEIGHT*0.5){
        self.viewBack.frame = CGRectMake(0, HEIGHT*0.5, WIDTH, HEIGHT*0.5);
    }else
    {
        self.viewBack.frame = CGRectMake(0, HEIGHT-height-90, WIDTH, height+90);
    }
    saveimage = self.allarr[page];
    
    if (page == 0)
    {
        self.withimage = self.withimage - 1;
        [self showImageWithScroll];
    }
    if (page == 2)
    {
        self.withimage = self.withimage + 1;
        [self showImageWithScroll];
    }
    if (page == 1 && self.withimage == 0) {
        self.withimage = self.withimage + 1;
        [self showImageWithScroll];

    }
}