我已将以下代码添加到我的UIViewController中：
override func viewDidLoad() {
super.viewDidLoad()
viewBrochures.isUserInteractionEnabled = true
let brochure1: UIImageView = UIImageView(image: UIImage(named: "image1")!)
brochure1.translatesAutoresizingMaskIntoConstraints = false
brochure1.contentMode = .scaleAspectFit
brochure1.frame = CGRect(x: 0, y: 0, width: UIScreen.main.bounds.width, height: 400)
viewBrochures.addSubview(brochure1)
let brochure2: UIImageView = UIImageView(image: UIImage(named: "image2")!)
brochure2.translatesAutoresizingMaskIntoConstraints = false
brochure2.contentMode = .scaleAspectFit
brochure2.frame = CGRect(x: 0, y: 0, width: UIScreen.main.bounds.width, height: 400)
viewBrochures.addSubview(brochure2)
let brochure3: UIImageView = UIImageView(image: UIImage(named: "image3")!)
brochure3.translatesAutoresizingMaskIntoConstraints = false
brochure3.contentMode = .scaleAspectFit
brochure3.frame = CGRect(x: 0, y: 0, width: UIScreen.main.bounds.width, height: 400)
viewBrochures.addSubview(brochure3)
let brochure4: UIImageView = UIImageView(image: UIImage(named: "image4")!)
brochure4.translatesAutoresizingMaskIntoConstraints = false
brochure4.contentMode = .scaleAspectFit
brochure4.frame = CGRect(x: 0, y: 0, width: UIScreen.main.bounds.width, height: 400)
viewBrochures.addSubview(brochure4)
viewBrochures.addConstraint(NSLayoutConstraint(item: brochure1,
attribute: .trailing,
relatedBy: .equal,
toItem: viewBrochures,
attribute: .trailingMargin,
multiplier: 1,
constant: 0))
viewBrochures.addConstraint(NSLayoutConstraint(item: brochure1,
attribute: .leading,
relatedBy: .equal,
toItem: viewBrochures,
attribute: .leadingMargin,
multiplier: 1,
constant: 0))
viewBrochures.addConstraint(NSLayoutConstraint(item: brochure1,
attribute: .top,
relatedBy: .equal,
toItem: viewBottomButtons,
attribute: .bottom,
multiplier: 1,
constant: 10))
viewBrochures.addConstraint(NSLayoutConstraint(item: brochure1,
attribute: .bottom,
relatedBy: .equal,
toItem: brochure2,
attribute: .top,
multiplier: 1,
constant: 10))
viewBrochures.addConstraint(NSLayoutConstraint(item: brochure2,
attribute: .trailing,
relatedBy: .equal,
toItem: viewBrochures,
attribute: .trailingMargin,
multiplier: 1,
constant: 0))
viewBrochures.addConstraint(NSLayoutConstraint(item: brochure2,
attribute: .leading,
relatedBy: .equal,
toItem: viewBrochures,
attribute: .leadingMargin,
multiplier: 1,
constant: 0))
viewBrochures.addConstraint(NSLayoutConstraint(item: brochure2,
attribute: .top,
relatedBy: .equal,
toItem: brochure1,
attribute: .bottom,
multiplier: 1,
constant: 10))
viewBrochures.addConstraint(NSLayoutConstraint(item: brochure2,
attribute: .bottom,
relatedBy: .equal,
toItem: brochure3,
attribute: .top,
multiplier: 1,
constant: 10))
viewBrochures.addConstraint(NSLayoutConstraint(item: brochure3,
attribute: .trailing,
relatedBy: .equal,
toItem: viewBrochures,
attribute: .trailingMargin,
multiplier: 1,
constant: 0))
viewBrochures.addConstraint(NSLayoutConstraint(item: brochure3,
attribute: .leading,
relatedBy: .equal,
toItem: viewBrochures,
attribute: .leadingMargin,
multiplier: 1,
constant: 0))
viewBrochures.addConstraint(NSLayoutConstraint(item: brochure3,
attribute: .top,
relatedBy: .equal,
toItem: brochure2,
attribute: .bottom,
multiplier: 1,
constant: 10))
viewBrochures.addConstraint(NSLayoutConstraint(item: brochure3,
attribute: .bottom,
relatedBy: .equal,
toItem: brochure4,
attribute: .top,
multiplier: 1,
constant: 10))
viewBrochures.addConstraint(NSLayoutConstraint(item: brochure4,
attribute: .trailing,
relatedBy: .equal,
toItem: viewBrochures,
attribute: .trailingMargin,
multiplier: 1,
constant: 0))
viewBrochures.addConstraint(NSLayoutConstraint(item: brochure4,
attribute: .leading,
relatedBy: .equal,
toItem: viewBrochures,
attribute: .leadingMargin,
multiplier: 1,
constant: 0))
viewBrochures.addConstraint(NSLayoutConstraint(item: brochure4,
attribute: .top,
relatedBy: .equal,
toItem: brochure3,
attribute: .bottom,
multiplier: 1,
constant: 10))
viewBrochures.addConstraint(NSLayoutConstraint(item: brochure4,
attribute: .bottomMargin,
relatedBy: .greaterThanOrEqual,
toItem: viewBrochures,
attribute: .bottom,
multiplier: 1,
constant: 10))
}
还有：
override func viewDidLayoutSubviews() {
scrlMain.contentSize = viewBrochures.bounds.size
}
请注意，我已经在故事板中设置了我的UIScrollView和我的容器视图（viewBrochures），我只需要将图像添加到容器中，然后就可以垂直滚动它们，因为它们不适合屏幕。在scrollview的容器视图中，我已经有2个其他视图需要在这些新图像之上（图像需要在2个视图之下，并且所有这些视图一起（2个视图+图像）需要在滚动视图中一起滚动）。这些其他2个视图已经添加到故事板中而没有任何问题。正如您所看到的，我已经创建了图像并以编程方式为它们添加了约束。我为每个图像添加了4个约束，一个用于引导，一个用于尾随，一个用于顶部，一个用于底部。最上面的图像我已经约束在视图底部的正上方，而最底部的图像我使用greaterThanOrEqual约束约束到容器视图的底部。我还在SO上看到，在代码中将图像添加到滚动视图时需要向图像添加“translatesAutoresizingMaskIntoConstraints = false”，但我不确定它究竟是做什么以及是否需要它。
因此，此代码适用于添加图像，但问题是scrollview根本不会滚动。我不确定这是否是正确的方法，所以请随时向我建议任何其他选择。如您所见，我使用了autolayout和布局约束。如果你能看出我的实施是否有任何问题，我们将不胜感激任何建议和/或更正。
答案 0 :(得分：1)
您的方法存在两个主要问题：
contentSize。只要正确设置了约束，UIScrollView就会自动调整其contentSize并滚动其内容。此外，您并不需要viewBrochures容器视图（除非它作为图像的容器除外）。您只需将上面的2个视图和所有图像添加为UIScrollView的直接子视图。
要使滚动视图有效，您必须执行以下操作：