未載入UITableViewCell中的圖像Swift

Question

1. 這是在TableView中爲每個Cell重複的函數。正如你所看到的，我在一個名爲Product的對象中傳入了一系列圖像（稱爲imageset）。 productImages是一個Product數組。在這個對象裏面我們有Name，Price和imageSet。

   func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell { 
   
       let cell = tableView.dequeueReusableCellWithIdentifier("productCell", forIndexPath: indexPath) as! ProductHomeCell 
   
       cell.productName.text = productImages[indexPath.row].name 
       cell.productPrice.text = "\(productImages[indexPath.row].price)" 
   
       //cell.PageImages contains Array of Images 
       cell.pageImages = productImages[indexPath.row].imageSet 
   
       return cell 
   } 
   

2. 現在我們本身在自定義的UITableViewCell在哪裏見過該產品的信息將被加載和顯示。注意：使用ScrollView滾動圖片（我從stackoverflow中的問題中提取代碼） PageImages是應該傳遞imageSet的變量。

   var pageImages: [UIImage] = [] 
   
   var pageViews: [UIImageView?] = [] 
   var pageControl : UIPageControl = UIPageControl(frame: CGRectMake(60, 300, 195, 5)) 
   
   
   override func awakeFromNib() { 
   
   
       super.awakeFromNib() 
       scrollView.delegate = self 
       pageControl = UIPageControl(frame: CGRectMake(230, 14, 107, 37)) 
   
       //PageImages should be loaded. 
       let pageCount = pageImages.count 
       self.pageControl.numberOfPages = pageCount 
       configurePageControl() 
       pageControl.enabled = false 
   
       // 3 
       for _ in 0..<pageCount { 
        pageViews.append(nil) 
       } 
   
       // 4 
       let pagesScrollViewSize = scrollView.frame.size 
   
   
       scrollView.contentSize = CGSize(width: pagesScrollViewSize.width * CGFloat(pageImages.count), 
        height: pagesScrollViewSize.height) 
   
   
       loadVisiblePages() 
   
   } 
   
   func loadPage(page: Int) { 
       if page < 0 || page >= pageImages.count { 
        // If it's outside the range of what you have to display, then do nothing 
        return 
       } 
   
       // 1 
       if let pageView = pageViews[page] { 
        // Do nothing. The view is already loaded. 
       } else { 
        // 2 
        var frame = scrollView.bounds 
        frame.origin.x = frame.size.width * CGFloat(page) 
        frame.origin.y = 0.0 
   
        // 3 
        let newPageView = UIImageView(image: pageImages[page]) 
        // let newPageView = UIImageView(image: imageC) 
   
        newPageView.contentMode = .ScaleAspectFit 
        newPageView.frame = frame 
        scrollView.addSubview(newPageView) 
   
        // 4 
        pageViews[page] = newPageView 
       } 
   } 
   
   func loadVisiblePages() { 
       // First, determine which page is currently visible 
       let pageWidth = scrollView.frame.size.width 
       let page = Int(floor((scrollView.contentOffset.x * 2.0 + pageWidth)/(pageWidth * 2.0))) 
   
       // Work out which pages you want to load 
       let firstPage = page - 1 
       let lastPage = page + 1 
   
       // Purge anything before the first page 
       for var index = 0; index < firstPage; ++index { 
        purgePage(index) 
       } 
   
       // Load pages in our range 
       for index in firstPage...lastPage { 
        loadPage(index) 
       } 
   
       // Purge anything after the last page 
       for var index = lastPage+1; index < pageImages.count; ++index { 
        purgePage(index) 
       } 
   } 
   
   func scrollViewDidScroll(scrollView: UIScrollView) { 
       // Load the pages that are now on screen 
       loadVisiblePages() 
   } 
   
   func purgePage(page: Int) { 
       if page < 0 || page >= pageImages.count{ 
        // If it's outside the range of what you have to display, then do   nothing 
        return 
       } 
   
       // Remove a page from the scroll view and reset the container array 
       if let pageView = pageViews[page] { 
        pageView.removeFromSuperview() 
        pageViews[page] = nil 
       } 
   } 
   
   override func setSelected(selected: Bool, animated: Bool) { 
       super.setSelected(selected, animated: animated) 
   
       // Configure the view for the selected state 
   } 
   
   
   func configurePageControl() { 
   
       self.pageControl.currentPage = 0 
       self.pageControl.tintColor = UIColor.blackColor() 
   
       self.pageControl.pageIndicatorTintColor = UIColor.lightGrayColor() 
       self.pageControl.currentPageIndicatorTintColor = UIColor.blackColor() 
       self.addSubview(pageControl) 
   } 
   
   func scrollViewDidEndDecelerating(scrollView: UIScrollView) { 
       let pageNumber = round(scrollView.contentOffset.x/scrollView.frame.size.width) 
       pageControl.currentPage = Int(pageNumber) 
   } 
   

3. 問題 - 產品名稱和價格完美的負荷。圖像不。當我調試它時看起來像是在awakeFromNib（）正在運行時，PageImages是空的，但是當我在cellForARowAtIndexPath方法中調試時，var PageImages在該indexPath.row處加載了imageSet。 感謝

Answer 1

awakeFromNib之前由dequeue...返回細胞因此試圖建立你的網頁有行不通的執行。我已經看到了這兩種方法，其一是有一個方法明確設置單元格：

func setupCell(productName:String, productPrice:Double, images:[UIImage]) { 
    // Do most of what you have in awakeFromNib here 
} 

或做在didSet的財產：

var pageImages : [UIImage] = [] { 
    didSet { 
     // Set up your page controller here. 
    } 
}