使用自动布局的滚动视图大小:compact/Any 大小 class 中的框架为 600x480,大于 iphone5?

scrollview size with Autolayout: frame is 600x480 in compact/Any size class, bigger than iphone5?

我希望滚动视图的框架与超级视图的框架大小相同。并设置内容大小,使其包含所有 imageView。

AutoLayout 的问题,宽度和高度是 600 x 480,我使用 iphone5,大小 class 是 w:Compact / h:Any。(我期望是这样的:320 x 523).
我的约束是:与 superview 等宽,与 superview 等高(乘数 0.8),水平中心 X 和垂直中心 Y。

let pagesScrollViewSize = scrollView.frame.size
println("pagesScrollViewSize : \(pagesScrollViewSize)") //600x480
scrollView.contentSize = CGSizeMake(pagesScrollViewSize.width * CGFloat(pageCount), pagesScrollViewSize.height)

有人知道怎么解决吗? imageview 看起来比屏幕的框架大,所以 .SizeAspectFit 没有遵循正确的尺寸。它没有滚动到另一个 imageView,而是滚动查看图像的其余部分,这是我不想要的。

编辑:
这是 ViewController.swift 中的全部代码:

class ViewController: UIViewController, UIScrollViewDelegate {

    @IBOutlet weak var pageControl: UIPageControl!
    @IBOutlet weak var scrollView: UIScrollView!

    var pageViews: [UIImageView?] = []
    var pageImages : [UIImage?] = []

    override func viewDidLoad() {
        super.viewDidLoad()

        pageImages = [UIImage(named:"photo1.png"),
        UIImage(named:"photo2.png"),
        UIImage(named:"photo3.png"),
        UIImage(named:"photo4.png")]

        let pageCount = pageImages.count
        pageControl.currentPage = 0
        pageControl.numberOfPages = pageCount

        for _ in 0..<pageCount {
            pageViews.append(nil)
        }

        let pagesScrollViewSize = scrollView.frame.size
        println("pagesScrollViewSize : \(pagesScrollViewSize)")
        scrollView.contentSize = CGSizeMake(pagesScrollViewSize.width * CGFloat(pageCount), pagesScrollViewSize.height)
        loadVisiblePages()
    }

    //when scrolling
    func scrollViewDidScroll(scrollView: UIScrollView!){
        loadVisiblePages()
    }

    func loadVisiblePages(){
        let pageWidth = scrollView.frame.size.width
        let page = Int(floor( (scrollView.contentOffset.x * 2.0 + pageWidth) / (pageWidth*2.0) ))
        println("page: \(page)")
        pageControl.currentPage = page
        let firstPage = page-1
        let lastPage = page+1
        //remove all the pages before firstPage
        for var index = 0; index < firstPage; ++index{
            purgePage(index)
        }
        //load pages in our range
        for var index = firstPage; index <= lastPage; ++index {
            loadPage(index)
        }
        //remove after lastPage
        for var index = lastPage+1; index < pageImages.count; ++index {
            purgePage(index)
        }
    }

    func loadPage(index:Int){
        if index < 0 || index >= pageImages.count {
            return
        }
        if let pageView = pageViews[index] {
            //already loaded
        }
        else {
            var frame = scrollView.bounds
            frame.origin.x = frame.size.width * CGFloat(index)
            frame.origin.y = 0.0
            println("\(frame)")

            var newImageView = UIImageView(image:pageImages[index])
            newImageView.contentMode = .ScaleAspectFit
            newImageView.frame = frame
            scrollView.addSubview(newImageView)

            pageViews[index] = newImageView
        }
    }

    func purgePage(index:Int){
        if index < 0 || index >= pageImages.count {
            return
        }
        if let pageView = pageViews[index] {
            pageView.removeFromSuperview()
            pageViews[index] = nil
        }
    }

}

谢谢

大小 类(或任何自动布局更改,就此而言)在 viewDidAppearviewDidLayoutSubviews 之后才会应用。您需要将此代码移至其中一个。您看到的是视图的框架,因为它是从 Interface Builder 文档(xib 或故事板)加载出来的。在这些生命周期事件之后,您永远不应该检查帧。

Unable to set frame correctly before viewDidAppear