您不能在两个地方使用相同的视图,因此您需要创建两个单独的垂直线视图。您需要像这样配置每个垂直线视图:
- 设置其背景颜色。
- 将其宽度限制为 1(这样您会得到一条线,而不是矩形)。
- 限制其高度(使其不会拉伸到堆栈视图的整个高度)。
因此,一次将一个标签添加到堆栈视图,并在将每个标签添加到堆栈视图之前执行以下操作:
if stackView.arrangedSubviews.count > 0 {
let separator = UIView()
separator.widthAnchor.constraint(equalToConstant: 1).isActive = true
separator.backgroundColor = .black
stackView.addArrangedSubview(separator)
separator.heightAnchor.constraint(equalTo: stackView.heightAnchor, multiplier: 0.6).isActive = true
}
请注意,您确实不希望垂直线与标签的宽度相同,因此您必须不将堆栈视图的 distribution 属性设置为fillEqually。相反,如果您希望所有标签具有相同的宽度,您必须自己在标签之间创建宽度约束。例如,添加每个新标签后,执行以下操作:
if let firstLabel = stackView.arrangedSubviews.first as? UILabel {
label.widthAnchor.constraint(equalTo: firstLabel.widthAnchor).isActive = true
}
结果:
完整的游乐场代码(由 Federico Zanetello 更新到 Swift 4.1):
import UIKit
import PlaygroundSupport
extension UIFont {
var withSmallCaps: UIFont {
let feature: [UIFontDescriptor.FeatureKey: Any] = [
UIFontDescriptor.FeatureKey.featureIdentifier: kLowerCaseType,
UIFontDescriptor.FeatureKey.typeIdentifier: kLowerCaseSmallCapsSelector]
let attributes: [UIFontDescriptor.AttributeName: Any] = [UIFontDescriptor.AttributeName.featureSettings: [feature]]
let descriptor = self.fontDescriptor.addingAttributes(attributes)
return UIFont(descriptor: descriptor, size: pointSize)
}
}
let rootView = UIView(frame: CGRect(x: 0, y: 0, width: 320, height: 44))
rootView.backgroundColor = .white
PlaygroundPage.current.liveView = rootView
let stackView = UIStackView()
stackView.axis = .horizontal
stackView.alignment = .center
stackView.frame = rootView.bounds
rootView.addSubview(stackView)
typealias Item = (name: String, value: Int)
let items: [Item] = [
Item(name: "posts", value: 135),
Item(name: "followers", value: 6347),
Item(name: "following", value: 328),
]
let valueStyle: [NSAttributedStringKey: Any] = [NSAttributedStringKey.font: UIFont.boldSystemFont(ofSize: 12).withSmallCaps]
let nameStyle: [NSAttributedStringKey: Any] = [NSAttributedStringKey.font: UIFont.systemFont(ofSize: 12).withSmallCaps,
NSAttributedStringKey.foregroundColor: UIColor.darkGray]
let valueFormatter = NumberFormatter()
valueFormatter.numberStyle = .decimal
for item in items {
if stackView.arrangedSubviews.count > 0 {
let separator = UIView()
separator.widthAnchor.constraint(equalToConstant: 1).isActive = true
separator.backgroundColor = .black
stackView.addArrangedSubview(separator)
separator.heightAnchor.constraint(equalTo: stackView.heightAnchor, multiplier: 0.4).isActive = true
}
let richText = NSMutableAttributedString()
let valueString = valueFormatter.string(for: item.value)!
richText.append(NSAttributedString(string: valueString, attributes: valueStyle))
richText.append(NSAttributedString(string: "\n" + item.name, attributes: nameStyle))
let label = UILabel()
label.attributedText = richText
label.textAlignment = .center
label.numberOfLines = 0
stackView.addArrangedSubview(label)
if let firstLabel = stackView.arrangedSubviews.first as? UILabel {
label.widthAnchor.constraint(equalTo: firstLabel.widthAnchor).isActive = true
}
}
UIGraphicsBeginImageContextWithOptions(rootView.bounds.size, true, 1)
rootView.drawHierarchy(in: rootView.bounds, afterScreenUpdates: true)
let image = UIGraphicsGetImageFromCurrentImageContext()!
UIGraphicsEndImageContext()
let png = UIImagePNGRepresentation(image)!
let path = NSTemporaryDirectory() + "/image.png"
Swift.print(path)
try! png.write(to: URL(fileURLWithPath: path))