Aligning multiple runtime generated UILabels in a UITableView

问题

I have a UITableView that needs to support content by listing style something like

But the tricky part is that the amount of "Label" will vary with each cell, some may have only 4 but also up to 12. Also the "Value" can be either a single word or short phrase up to two lines(like in the image above). So I decided to use UIStackView to help me pack and size my UILabels used to display this. I am currently stuck at a problem when the "Label" varies in length like:

I need the leading end of the "Values" to be aligned like the first image even though the "Label" vary in length. Is there a behaviour of UIStackView that allows so? Or is there another approach that can allow me to obtain the results I need?

Note: Each "Label" and "Value" is in one UIStackView, I did it to align them.

I tried using String Formatting too, but "Values" with more than one line will wrap under the label instead of wrapping by itself like I manage to do in the images.

I tried placing all "Labels" in one UIStackView and all "Values" in another, I could no get them to align like they do in the images once the "Value" is more than one line.

Or if it might be a mistake I made somewhere, this is how I created the UIStackViews:

    var higherCount = 0
    if labels.count<values.count {
        higherCount = values.count
    } else {
        higherCount = labels.count
    }

    mainStackView = UIStackView(frame: CGRect(x: 0, y: 0, width: frame.width, height: frame.height))

    for i in 0..<higherCount {
        var height:CGFloat = 20
        if (values[i] as NSString).size(attributes: [NSFontAttributeName:UIFont.systemFont(ofSize: UIFont.systemFontSize)]).width > frame.width {
            height = 42
        }

        let stackViewToAdd = UIStackView(frame: CGRect(x: 0, y: 0, width: frame.width, height: height))

        let label = UILabel(frame: CGRect(x: 0, y: 0, width: frame.width, height: height))
        if labels.count<higherCount {
            label.text = ""
        } else {
            label.text = labels[i]
        }
        label.setContentCompressionResistancePriority(1000, for: .horizontal)
        label.setContentHuggingPriority(999, for: .horizontal)
        stackViewToAdd.addArrangedSubview(label)
        let value = UILabel(frame: CGRect(x: 0, y: 0, width: frame.width, height: height))
        if values.count<higherCount {
            value.text = ""
        } else {
            value.text = values[i]
        }
        value.lineBreakMode = .byWordWrapping
        value.numberOfLines = 2
        stackViewToAdd.addArrangedSubview(value)
        mainStackView?.addArrangedSubview(stackViewToAdd)
    }
    mainStackView?.alignment = .fill
    mainStackView?.axis = .vertical
    mainStackView?.distribution = .fill

回答1:

I you created your cell programmatically, then you can resize the cell programmatically depends on the size of UILabel Content.

In my case Label font is UIFont.systemFont(ofSize: 15), minimum TableViewCell height is 50, arrLabel1 and arrLabel2 will be the content of Labels.

func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return arrLable1.count
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = UITableViewCell(style: .default, reuseIdentifier: "\(indexPath.row)")

    let lable1 = UILabel(frame: CGRect(x: 10, y: 10, width: view.frame.size.width - 20, height: 0))
    lable1.numberOfLines = 0
    lable1.font = UIFont.systemFont(ofSize: 15)
    lable1.text = arrLable1[indexPath.row]
    lable1.sizeToFit()
    cell.addSubview(lable1)

    let lable2 = UILabel(frame: CGRect(x: 10, y: lable1.frame.origin.y + lable1.frame.size.height + 10 , width: view.frame.size.width - 20, height: 0))
    lable2.numberOfLines = 0
    lable2.font = UIFont.systemFont(ofSize: 15)
    lable2.text = arrLable2[indexPath.row]
    lable2.sizeToFit()
    cell.addSubview(lable2)

    return cell
}

func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath)
    -> CGFloat {

    let boundingRect1 = arrLable1[indexPath.row].boundingRect(with: CGSize(width: view.frame.size.width - 40 , height: CGFloat(MAXFLOAT)), options: NSStringDrawingOptions.usesLineFragmentOrigin,attributes:[ NSFontAttributeName : UIFont.systemFont(ofSize: 15)] ,context: nil)

    let boundingRect2 = arrLable2[indexPath.row].boundingRect(with: CGSize(width: view.frame.size.width - 40 , height: CGFloat(MAXFLOAT)), options: NSStringDrawingOptions.usesLineFragmentOrigin,attributes:[ NSFontAttributeName : UIFont.systemFont(ofSize: 15)] ,context: nil)

    guard boundingRect1.height + boundingRect2.height + 30 > 50 else {
        return 50
    }

    return boundingRect1.height + boundingRect2.height + 30
}

Set Label numberOfLines to 0

来源：https://stackoverflow.com/questions/41439786/aligning-multiple-runtime-generated-uilabels-in-a-uitableview