ios - 根据从 xib 文件加载的 subview 调整 UIView 的大小

Question

我有一个 xib 文件，它的高度可以动态改变，因为它包含多行标签。我需要将此 View 添加为在我的 View Controller 中定义的 uiview 的 subview 。

let settlementDetailsContentView = SettlementDetailsView.instanceFromNib(nibNamed: NibConstants.SettlementDetailsViewNib)
settlementDetailsContentView.frame = settlementDetailsView.bounds
settlementDetailsView.addSubview(settlementDetailsContentView)

这里的settlementDetailsContentView包含了在Interface中设计的 View build 者。 settlementDetailsView 是在我的 View Controller 中定义的 View ，其高度约束大于或等于零。

下面的代码是根据 nib 名称返回 View 的函数

 class func instanceFromNib(nibNamed : String) -> SettlementDetailsView
 {
     return UINib(nibName: nibNamed, bundle: nil).instantiate(withOwner: nil, options: nil)[0] as! SettlementDetailsView
 }

我所做的问题是 settlementdetailsview 下面的 View 与此重叠，因为 View 高度没有根据 subview 调整大小。

This is how the UI looks.Claim documents overlapping on settlementDetails view.

This is how the uiview should look like

Answer 1

问题是您没有更改 settlementDetailsView 的框架。在下面的代码中

let settlementDetailsContentView = SettlementDetailsView.instanceFromNib(nibNamed: NibConstants.SettlementDetailsViewNib)
settlementDetailsView.addSubview(settlementDetailsContentView)
settlementDetailsContentView.translatesAutoresizingMaskIntoConstraints = false
settlementDetailsContentView.topAnchor.constraint(equalTo: settlementDetailsView.topAnchor).isActive = true
settlementDetailsContentView.bottomAnchor.constraint(equalTo: settlementDetailsView.bottomAnchor).isActive = true
settlementDetailsContentView.trailingAnchor.constraint(equalTo: settlementDetailsView.trailingAnchor).isActive = true
settlementDetailsContentView.leadingAnchor.constraint(equalTo: settlementDetailsView.leadingAnchor).isActive = true

你限制 subview 增长到 superView 的完整大小或者 superView 缩小到 subview 的大小(这取决于 superview 的约束和两者的拥抱/压缩，但应该给你的愿望影响)。

参见 autolayout引用

编辑

现在您已经发布了它应该是这样的，下面的代码完成了:

let superView = settlementDetailsView.superview!
let settlementDetailsContentView = SettlementDetailsView.instanceFromNib(nibNamed: NibConstants.SettlementDetailsViewNib)
superview.addSubview(settlementDetailsContentView)
settlementDetailsContentView.translatesAutoresizingMaskIntoConstraints = false
settlementDetailsContentView.topAnchor.constraint(equalTo: settlementDetailsView.bottomAnchor).isActive = true
settlementDetailsContentView.bottomAnchor.constraint(equalTo: superview.bottomAnchor).isActive = true
settlementDetailsContentView.trailingAnchor.constraint(equalTo: superview.trailingAnchor).isActive = true
settlementDetailsContentView.leadingAnchor.constraint(equalTo: superview.leadingAnchor).isActive = true

请注意，如果 settlementDetailsView 对其 superView 有底部约束，您应该停用它。