Ios 在滚动视图中更改UIView，同时/更新滚动视图高度-Swift 3/Xcode 8

我有一个带滚动视图的普通ViewController。滚动视图中有一些视图、标签和一些按钮。所有这些下面都是一个UIView。每当按下其中一个按钮时，UIView就会向其传递多个视图控制器。传递到UIView的每个视图控制器都是一个不同高度的视图控制器

要解释的图片：

如何调整滚动视图，使其适合从按下按钮传入的新视图控制器

更新 这是我的代码：

 @IBAction func didPressTab(_ sender: UIButton) {


    let previousIndex = selectedIndex
    selectedIndex = sender.tag
    buttons[previousIndex].isSelected = false
    let previousVC = viewControllers[previousIndex]
    previousVC.willMove(toParentViewController: nil)
    previousVC.view.removeFromSuperview()
    previousVC.removeFromParentViewController()
    sender.isSelected = true
    let vc = viewControllers[selectedIndex]
    addChildViewController(vc)


    print("1. NEW VIEW HEIGHT \(vc.view.frame.height)")
    print("1. SCROLL VIEW HEIGHT \(scrollView.contentSize.height)")
    print("1. VIEW CONTROLLER HEIGHT \(self.view.frame.height)")
    print("1. CV HEIGHT \(contentView.frame.height)")
    contentView.layoutIfNeeded()
    height = vc.view.frame.size.height
    contentView.translatesAutoresizingMaskIntoConstraints = true
    contentView.frame.size.height = vc.view.frame.height
    vc.view.frame = contentView.bounds
    scrollView.contentSize.height = staticView.frame.height + height!
    contentView.addSubview(vc.view)



    print("2. NEW VIEW HEIGHT \(vc.view.frame.height)")
    print("2. SCROLL VIEW HEIGHT \(scrollView.contentSize.height)")
    print("2. VIEW CONTROLLER HEIGHT \(self.view.frame.height)")
    print("2. CV HEIGHT \(contentView.frame.height)")

    vc.didMove(toParentViewController: self)




}

if selectedIndex == 0 {

        vc.view.frame.size.height = 480

    }

    if selectedIndex == 1 {

        vc.view.frame.size.height = 448

    }

    if selectedIndex == 2 {

        vc.view.frame.size.height = 715

    }

    if selectedIndex == 3 {

        vc.view.frame.size.height = 480

    }

---

我能够改变高度，但它最终使UIView的大小达到普通VC（667）的大小，这不是我所需要的，因为一些ViewController的高度只有450

每当嵌入式视图控制器更改时，必须重新计算滚动视图内容大小的高度。 新高度为图像视图高度+按钮容器高度+内容视图高度。

---

显然，您还必须调整容器视图的高度。

我找到了解决方案

前言： 视图控制器具有假定的大小。（手机屏幕的大小）。这就是为什么每当我展示一个视图时，在UIView中添加的视图总是667-（iPhone 6屏幕大小）。为了解决这个问题，我做了以下几点：

代码：

 @IBAction func didPressTab(_ sender: UIButton) {


    let previousIndex = selectedIndex
    selectedIndex = sender.tag
    buttons[previousIndex].isSelected = false
    let previousVC = viewControllers[previousIndex]
    previousVC.willMove(toParentViewController: nil)
    previousVC.view.removeFromSuperview()
    previousVC.removeFromParentViewController()
    sender.isSelected = true
    let vc = viewControllers[selectedIndex]
    addChildViewController(vc)


    print("1. NEW VIEW HEIGHT \(vc.view.frame.height)")
    print("1. SCROLL VIEW HEIGHT \(scrollView.contentSize.height)")
    print("1. VIEW CONTROLLER HEIGHT \(self.view.frame.height)")
    print("1. CV HEIGHT \(contentView.frame.height)")
    contentView.layoutIfNeeded()
    height = vc.view.frame.size.height
    contentView.translatesAutoresizingMaskIntoConstraints = true
    contentView.frame.size.height = vc.view.frame.height
    vc.view.frame = contentView.bounds
    scrollView.contentSize.height = staticView.frame.height + height!
    contentView.addSubview(vc.view)



    print("2. NEW VIEW HEIGHT \(vc.view.frame.height)")
    print("2. SCROLL VIEW HEIGHT \(scrollView.contentSize.height)")
    print("2. VIEW CONTROLLER HEIGHT \(self.view.frame.height)")
    print("2. CV HEIGHT \(contentView.frame.height)")

    vc.didMove(toParentViewController: self)




}

if selectedIndex == 0 {

        vc.view.frame.size.height = 480

    }

    if selectedIndex == 1 {

        vc.view.frame.size.height = 448

    }

    if selectedIndex == 2 {

        vc.view.frame.size.height = 715

    }

    if selectedIndex == 3 {

        vc.view.frame.size.height = 480

    }

---

这是放在IBAction里面的。就在定义了vc之后。

我已经发布了我的代码。我已经做了你提到的事情，高度确实发生了变化，只是大小不合适，而且每个视图的高度都是一样的，尽管它们的高度不同。