ios - 无法正确配置 UIScrollView(Offset on top)

Question

我整个上午都在为此苦苦挣扎，似乎找不到解决方案。我创建了一个 UIImageView，用红色填充它，然后将它添加到 UIScrollView 并将 contentSize 设置为 的大小UIImageView。如果我打印 contentOffset 我会看到 (0, 0) 如果我打印 contentSize 和 UIImageView.frame.size 它们是相同的，但红色“图像”总是显得比 scrollView 认为的 contentSize 小。

如果我一直滚动到顶部，我会看到红色图像上方约 100 像素高的青色条纹，并且滚动条不会一直滚动到我认为 ScrollView 顶部的顶部是。虽然滚动条的顶部确实与我的红色窗口的顶部对齐，所以 ScrollView 似乎对它实际所在的位置感到困惑。或者更有可能，我很困惑

这是我看似非常简单的代码...

    imgHorizon = UIImage.init(named:"horizon")!
    imgBezel = UIImage.init(named:"bezel_transparent")!
    imgWings = UIImage.init(named:"wings_transparent")!

    imgViewHorizon = UIImageView.init()
    imgViewBezel = UIImageView.init()
    imgViewWings = UIImageView.init()

    svHorizon = UIScrollView.init()

    super.init(coder: aDecoder)

    imgViewHorizon = UIImageView(frame: CGRect(x: 0, y: 0, width: imgBezel.size.width, height: imgHorizon.size.height))
    imgViewHorizon.backgroundColor = UIColor.red

    imgViewBezel = UIImageView(frame: CGRect(x: 0, y: 0, width: imgBezel.size.width, height: imgBezel.size.height))
    imgViewBezel.contentMode = UIViewContentMode.center
    imgViewBezel.clipsToBounds = true
    imgViewBezel.image = imgBezel

    imgViewWings = UIImageView(frame: CGRect(x: 0, y: 0, width: imgBezel.size.width, height: imgBezel.size.height))
    imgViewWings.contentMode = UIViewContentMode.center
    imgViewWings.clipsToBounds = true
    imgViewWings.image = imgWings

    svHorizon = UIScrollView(frame: CGRect(x: 0, y: 0, width: imgBezel.size.width, height: imgBezel.size.width))
    svHorizon.contentSize = CGSize(width: imgBezel.size.width, height: imgHorizon.size.height)
    svHorizon.contentMode = UIViewContentMode.scaleToFill
    svHorizon.bounces = false
    svHorizon.backgroundColor = UIColor.cyan
    svHorizon.contentOffset = CGPoint(x: 0, y: 0)

    svHorizon.addSubview(imgViewHorizon)
    addSubview(svHorizon)
    addSubview(imgViewBezel)
    addSubview(imgViewWings)

Answer 1

从评论中的讨论可以看出，Adjust Scroll View Insets 选项已在 ViewController 的属性检查器中选中。取消选中它解决了问题。看看下面的图片。您需要取消选中突出显示的选项。