可可触摸-创建一排排图像的UIScroll视图

Question

我想在Scroll视图中显示数据库中的图像。此外，我想在一行中显示4个图像，然后在下一行中再显示4个，依此类推。最初滚动视图将只显示2行，垂直滚动后，用户将能够滚动数据库中的所有图像。有人能提出任何合适的措施来做到这一点吗？或者提供任何示例演示或代码。任何帮助都将不胜感激。

我用这个代码来获得水平方向的图像。在连续5个图像之后，我怎么能以垂直方向的方式来做呢。我的代码：-

 - (void)layoutScrollImages
 {
     UIImageView *view = nil;
    NSArray *subviews = [scrollView1 subviews];
    CGFloat curXLoc = 40;
// reposition all image subviews in a horizontal serial fashion
//CGFloat curYLoc = 0;
for (view in subviews)
{
    //if ([view isKindOfClass:[UIImageView class]] && view.tag > 0)
    if(view)
    {
        CGRect frame = view.frame;
        frame.origin = CGPointMake(curXLoc, 40);
        view.frame = frame;
        curXLoc += (kScrollObjWidth);           
    }
}
     // set the content size so it can be scrollable
     [scrollView1 setContentSize:CGSizeMake((20 * kScrollObjWidth),[scrollView1 bounds].size.height)];
     //[self layoutScrollLabels];
 }

在视图中加载了我创建的滚动视图为：-

scrollView1 = [[UIScrollView alloc] initWithFrame:CGRectMake(25,48,630,180)];
[scrollView1 setBackgroundColor:[UIColor lightGrayColor]];
[scrollView1 setCanCancelContentTouches:NO];
//scrollView1.indicatorStyle = UIScrollViewIndicatorStyleWhite;
//scrollView1.clipsToBounds = YES;      // default is NO, we want to restrict drawing within our scrollview
scrollView1.scrollEnabled = YES;
scrollView1.pagingEnabled=YES;
scrollView1.showsVerticalScrollIndicator = YES;
//scrollView1.showsHorizontalScrollIndicator = YES;
//scrollView1.alwaysBounceVertical = YES;
//scrollView1.alwaysBounceHorizontal = NO;
    [self.view addSubview:scrollView1];

谢谢，Christy

Answer 1

你看过Three20的照片库控件吗？有一个关于如何使用它的教程here（由Ray Wenderlich编写）。

Answer 2

------更新-------

- (void)layoutScrollImages
{
    //Considered your Image width & height as 50
    int i; //Variable to keep count per line;
    CGFloat curXLoc = 10; //Variable to keep X Location track
    CGFloat curXLoc = 0; //Variable to keep Y Location track
    for (UIImageView *tmpImgView in [scrollView1 subviews])
    {
        if(tmpImgView)
        {
            CGRect frame = view.frame;
            frame.origin.x = curXLoc;
            frame.origin.y = curYLoc;
            view.frame = frame;
            curXLoc = curXLoc + 55; // Adding 55 for next photo X position
            if(i!=1 && i%5 == 0)
            {
                curXLoc = 10; //Reset X Location so that it will start from left again;
                curYLoc = curYLoc + 55; // Adding 55 for next photo Y position if 5 photos are placed in one row
            }
        }
        i++;
    }
    // set the content size so it can be scrollable
    [scrollView1 setContentSize:CGSizeMake(yourScrollViewWidth,curYLoc+100)];
}

-----更新完成-------

给你，

-(void)setImagesInScrollView
{
    scrollView.delegate = self;
    int i=1;
    CGFloat cx = 0;
    CGFloat cy = 0;
    for(UIImageView *yourImgView in yourImgArray)
    {
        //Create Image
        UIImageView *imgView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 100, 80)];
        imgView.contentMode = UIViewContentModeCenter;
        imgView.image = yourImgView.image;
        CGRect rect = imgView.frame;
        rect.size.height = imgView.frame.size.height;
        rect.size.width = imgView.frame.size.width;
        rect.origin.x += cx;
        rect.origin.y += cy;
        imgView.frame = rect;
        cx+=imgView.frame.size.width + 60;
        [scrollView addSubview:imgView];
        if(i!=1 && i%6==0)
        {
            cx=62;
            cy+=155;
        }
        [imgView release];
        i++;
    }
    [scrollView setContentSize:CGSizeMake(1024, cy+150)];
    [scrollView setFrame:CGRectMake(scrollView.frame.origin.x, scrollView.frame.origin.y, 1024, 630)];
    [scrollView setContentSize:CGSizeMake(1024, cy+150)];
    [scrollView setContentOffset:CGPointMake(0.0, 0.0)];
}

以上代码是为iPad设置图像与100&80宽度&高度。cx和cy变量用于跟踪定位下一个图像。在1行中，可以使用6个图像（横向模式）。根据您的要求修改相同的代码。

如果您需要进一步的帮助，请留言。

希望这能有所帮助。