我正在尝试将包含多个标签的 xib 中的 UIStackView 加载到父 UIStackView 中。viewDidLoad子堆栈中的标签通过模型对象在方法中的 ViewController 之后填充值（或隐藏） 。
我希望父 stackview 能够识别子 stackview 内在高度的变化，从而将兄弟视图向下移动。但是，下一个视图（按钮）覆盖了子堆栈的内容。为什么父级不能识别子视图高度的这种变化？我没有看到任何错误消息、模棱两可的约束或冲突。
以下是错误的呈现方式以及视图在 View Hierarchy 中的显示方式。
我努力了：
- 在子堆栈视图周围添加 UIView 包装器，以查看父级是否会注册其高度的更改。
- 将所有代码移到父视图控制器中，避免加载 xib，这似乎确实有效，但代价是失去了模块化和关注点分离。
- 根据其他文章推荐对子 stackview 添加了可选的高度约束，导致位置不随内容弯曲，或无法解决原始问题。
这是故事板布局
父视图控制器
class AcceptTermsViewController: RegistrationViewController {
@IBOutlet weak var infoView: StackViewInBorderedView!
@IBOutlet weak var termsView: TermsTextView!
@IBOutlet weak var masterStack: UIStackView!
var registration: Registration?
override func viewDidLoad() {
super.viewDidLoad()
self.configView()
self.setupNavBar()
}
func configView() {
if let reg = registration {
infoView.configView(reg)
}
}
}
子 StackView 代码
class StackViewInBorderedView: UIStackView {
// loaded from NIB
private weak var view: UIView!
@IBOutlet weak var nameLabel: UILabel!
@IBOutlet weak var titleLabel: UILabel!
@IBOutlet weak var emailLabel: UILabel!
@IBOutlet weak var locationLabel: UILabel!
@IBOutlet weak var postalLabel: UILabel!
@IBOutlet weak var idLabel: UILabel!
@IBOutlet weak var npiLabel: UILabel!
override init(frame: CGRect) {
super.init(frame: frame)
loadViewFromNib()
}
required init(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
loadViewFromNib()
}
fileprivate func loadViewFromNib() {
self.view = Bundle (for: type(of: self)).loadNibNamed(
"StackViewInBorderedView", owner: self, options: nil)! [0] as? UIView
view.frame = bounds
view.autoresizingMask = [.flexibleWidth]
self.addSubview(view)
}
override func layoutSubviews() {
super.layoutSubviews()
self.layer.cornerRadius = 10
let shadowLayer = CAShapeLayer()
shadowLayer.path = UIBezierPath(roundedRect: self.bounds, cornerRadius: self.frame.height / 12).cgPath
shadowLayer.fillColor = UIColor.white.cgColor
shadowLayer.shadowColor = UIColor.gray.cgColor
shadowLayer.shadowOffset = CGSize.zero
shadowLayer.shadowOpacity = 1
shadowLayer.shadowRadius = 3
shadowLayer.masksToBounds = false
self.layer.insertSublayer(shadowLayer, at: 0)
}
func configView(_ reg: Registration) {
configLabels(reg)
isLayoutMarginsRelativeArrangement = true
directionalLayoutMargins = NSDirectionalEdgeInsets(top: 20, leading: 20, bottom: 20, trailing: 0)
}
func configLabels(_ reg: Registration) {
// Name line
if let degree = reg.degree {
nameLabel.text = "\(reg.firstName!) \(reg.lastName!), \(degree)"
} else {
nameLabel.text = "\(reg.firstName!) \(reg.lastName!)"
}
// Title line
if let title = reg.title {
titleLabel.text = title
} else {
titleLabel.isHidden = true
}
// Email line
if let email = reg.email {
emailLabel.text = email
} else {
emailLabel.isHidden = true
}
// Location line
if let city = reg.city, let state = reg.state, let postal = reg.postalCode,
!city.isEmpty, !state.isEmpty, !postal.isEmpty {
postalLabel.text = "\(city), \(state) \(postal)"
} else if let postal = reg.postalCode {
postalLabel.text = postal
}
// NPI line
if let licenseId = reg.licenseId {
switch reg.countryCode {
case "BR":
idLabel.text = "ID"
default:
idLabel.text = "NPI"
}
npiLabel.text = licenseId
} else {
self.idLabel.isHidden = true
self.npiLabel.isHidden = true
}
}
}