Question

我有一个函数可以找到应该添加到堆栈视图中并添加到堆栈视图的星号数。 stackview位于表格单元格内，因此显示正确的评级，从CoreData检索。但是，评级未显示。

功能......

  func setRating(entry: Entry, ratingView: UIStackView) -> UIStackView{

    for _ in 0..<Int(entry.rating) {

        let image = UIImage(named:"ratingFilled")
        let imageView = UIImageView(image: image!)

        imageView.frame = CGRect(x: 0, y: 0, width: 20, height: 20)

        NSLayoutConstraint(item: image!, attribute: .height, relatedBy: .equal, toItem: image!, attribute:.width, multiplier: 1.0, constant:0.0).isActive = true

        ratingView.addArrangedSubview(imageView)
    }

    return ratingView
}

Tableview单元格调用...

public func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell{ //creates rzeusable cell and assigns cell items

    let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! TableViewCell

    let entry = entries[indexPath.row]

    cell.nameLabel?.text = entry.restaurantName

    cell.ratingView = setRating(entry: entry, ratingView: cell.ratingView)

    return cell
}

Answer 1

您需要为每个imageView或stackView本身添加宽度约束。

NSLayoutConstraint(item: image!, attribute: .width, relatedBy: .equal, toItem: nil, attribute: .notAnAttribute, multiplier: 1.0, constant: 20.0).isActive = true
NSLayoutConstraint(item: image!, attribute: .height, relatedBy: .equal, toItem: nil, attribute: .notAnAttribute, multiplier: 1.0, constant: 20.0).isActive = true

还要确保将stackView轴设置为水平

stackView.axis = .horizontal

如何通过stackview

1 个答案: