我得到一个不同文本的json对象。我使用以下函数addText(content: number.content!, bottomAnchor: anchor!)
逐个排列获得的作品:
func addText(content: String, bottomAnchor: NSLayoutYAxisAnchor) -> NSLayoutYAxisAnchor {
let shortContentPost: UILabel = {
let label = UILabel()
label.text = content
label.numberOfLines = 0
label.sizeToFit()
label.font = UIFont.systemFont(ofSize: 16, weight: UIFont.Weight.regular)
let attributedString = NSMutableAttributedString(string: label.text!)
let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.lineSpacing = 10
attributedString.addAttribute(NSAttributedStringKey.paragraphStyle, value:paragraphStyle, range:NSMakeRange(0, attributedString.length))
label.attributedText = attributedString;
return label
}()
contentView.addSubview(shortContentPost)
shortContentPost.anchor(bottomAnchor, left: self.leftAnchor, bottom: nil, right: self.rightAnchor, topConstant: 15, leftConstant: 15, bottomConstant: 0, rightConstant: 15, widthConstant: 0, heightConstant: 100)
return shortContentPost.bottomAnchor
}
所有内容都在UITableViewCell中输出,但无法以任何方式调整自动高度。
选择这样一个奇怪的输出路线是为了获得这样的网格。并且类似的结论用于在一个单元格中组合文本,图片,链接等。
以前,我通过UICollectionView实现了所有这些并手动计算了高度。方式有效,但是高度计算不准确,他不得不拒绝。
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 3
}
internal func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return UITableViewAutomaticDimension
}
func tableView(_ tableView: UITableView, estimatedHeightForRowAt indexPath: IndexPath) -> CGFloat {
return 50.0
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
if(indexPath.item == 0){
let cell = tableView.dequeueReusableCell(withIdentifier: "postId", for: indexPath) as! PostViewTableCell
cell.contentArray = contentArray
cell.homeController = self.navigationController
return cell
}
let cell = tableView.dequeueReusableCell(withIdentifier: "cellId", for: indexPath)
return cell
}
这些是tableView函数
TableViewCell:
import UIKit
class PostViewTableCell: UITableViewCell {
var anchor: NSLayoutYAxisAnchor?
var contentArray: [PostContentModel]?{
didSet{
anchor = datePublishPost.bottomAnchor
for number in contentArray! {
if(number.switcher == 1) {
anchor = addTextContent(content: number.content!, bottomAnchor: anchor!)
}
if(number.switcher == 2){
anchor = addImageContent(content: number.content!, bottomAnchor: anchor!)
}
if(number.switcher == 3){
anchor = addCaptionFirst(content: number.content!, bottomAnchor: anchor!)
}
if(number.switcher == 4){
anchor = addButtonLink(content: number.content!, link: number.link!, bottomAnchor: anchor!)
}
}
}
}
let authorImage: CustomImageView = {
let image = CustomImageView()
image.backgroundColor = .white
image.image = UIImage(named: "authorImage")
image.layer.masksToBounds = false
image.layer.cornerRadius = 15
image.clipsToBounds = true
return image
}()
let authorNameLabel: UILabel = {
let label = UILabel()
label.font = UIFont.systemFont(ofSize: 14)
label.textColor = UIColor(red: 0.51, green: 0.51, blue: 0.51, alpha: 1)
return label
}()
let titlePost: UILabel = {
let label = UILabel()
label.font = UIFont.systemFont(ofSize: 24, weight: UIFont.Weight.semibold)
label.numberOfLines = 0
return label
}()
let categoryPost: UILabel = {
let label = UILabel()
label.textColor = UIColor(red: 0.31, green: 0.31, blue: 0.31, alpha: 1)
label.font = UIFont.systemFont(ofSize: 12, weight: UIFont.Weight.semibold)
return label
}()
let datePublishPost: UILabel = {
let label = UILabel ()
label.font = UIFont.systemFont(ofSize: 12, weight: UIFont.Weight.regular)
label.textColor = UIColor(red: 0.52, green: 0.52, blue: 0.52, alpha: 1)
return label
}()
var homeController: UINavigationController?
override init(style: UITableViewCellStyle, reuseIdentifier: String?) {
super.init(style: style, reuseIdentifier: reuseIdentifier)
setupView()
}
override func prepareForReuse() {
super.prepareForReuse()
let subviews = self.subviews
for subview in subviews {
subview.removeFromSuperview()
}
}
func setupView(){
addSubview(authorImage)
addSubview(authorNameLabel)
addSubview(titlePost)
addSubview(categoryPost)
addSubview(datePublishPost)
authorImage.anchor(self.topAnchor, left: self.leftAnchor, bottom: nil, right: nil, topConstant: 20, leftConstant: 15, bottomConstant: 0, rightConstant: 0, widthConstant: 30, heightConstant: 30)
authorNameLabel.anchor(authorImage.topAnchor, left: authorImage.rightAnchor, bottom: nil, right: nil, topConstant: 5, leftConstant: 10, bottomConstant: 0, rightConstant: 0, widthConstant: 0, heightConstant: 0)
titlePost.anchor(authorNameLabel.bottomAnchor, left: self.leftAnchor, bottom: nil, right: self.rightAnchor, topConstant: 13, leftConstant: 15, bottomConstant: 0, rightConstant: 15, widthConstant: 0, heightConstant: 0)
categoryPost.anchor(titlePost.bottomAnchor, left: self.leftAnchor, bottom: nil, right: nil, topConstant: 7, leftConstant: 15, bottomConstant: 0, rightConstant: 0, widthConstant: 0, heightConstant: 0)
datePublishPost.anchor(categoryPost.topAnchor, left: categoryPost.rightAnchor, bottom: nil, right: nil, topConstant: 0, leftConstant: 15, bottomConstant: 0, rightConstant: 0, widthConstant: 0, heightConstant: 0)
}
func addTextContent(content: String, bottomAnchor: NSLayoutYAxisAnchor) -> NSLayoutYAxisAnchor{
let shortContentPost: UILabel = {
let label = UILabel()
label.text = content
label.numberOfLines = 0
label.font = UIFont.systemFont(ofSize: 16, weight: UIFont.Weight.regular)
let attributedString = NSMutableAttributedString(string: label.text!)
let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.lineSpacing = 10
attributedString.addAttribute(NSAttributedStringKey.paragraphStyle, value:paragraphStyle, range:NSMakeRange(0, attributedString.length))
label.attributedText = attributedString;
return label
}()
contentView.addSubview(shortContentPost)
shortContentPost.anchor(bottomAnchor, left: self.leftAnchor, bottom: nil, right: self.rightAnchor, topConstant: 15, leftConstant: 15, bottomConstant: 0, rightConstant: 15, widthConstant: 0, heightConstant: 0)
return shortContentPost.bottomAnchor
}
func addImageContent(content: String, bottomAnchor: NSLayoutYAxisAnchor) -> NSLayoutYAxisAnchor {
let image: CustomImageView = {
let image = CustomImageView()
image.image = UIImage(named: content)
image.contentMode = .scaleAspectFill
image.clipsToBounds = true
return image
}()
let imageURL = "https://brodude.ru/wp-content/uploads/" + content.addingPercentEncoding(withAllowedCharacters: .urlHostAllowed)!
image.loadImageUsingUrlString(urlString: imageURL)
contentView.addSubview(image)
image.anchor(bottomAnchor, left: self.leftAnchor, bottom: nil, right: self.rightAnchor, topConstant: 15, leftConstant: 0, bottomConstant: 0, rightConstant: 0, widthConstant: 0, heightConstant: 250)
return image.bottomAnchor
}
func addCaptionFirst(content: String, bottomAnchor: NSLayoutYAxisAnchor) -> NSLayoutYAxisAnchor {
let Caption: UILabel = {
let lb = UILabel()
lb.text = content
lb.numberOfLines = 0
lb.font = UIFont.systemFont(ofSize: 20, weight: UIFont.Weight.semibold)
return lb
}()
contentView.addSubview(Caption)
Caption.anchor(bottomAnchor, left: self.leftAnchor, bottom: nil, right: self.rightAnchor, topConstant: 30, leftConstant: 15, bottomConstant: 0, rightConstant: 15, widthConstant: 0, heightConstant: 0)
return Caption.bottomAnchor
}
func addButtonLink(content: String, link: String, bottomAnchor: NSLayoutYAxisAnchor) -> NSLayoutYAxisAnchor {
let button: LinkButton = {
let bt = LinkButton()
bt.LinkString = link
bt.titleLabel?.font = UIFont.systemFont(ofSize: 18, weight: UIFont.Weight.semibold)
bt.setTitle(content, for: UIControlState.normal)
bt.titleLabel?.numberOfLines = 0
bt.contentHorizontalAlignment = .left
bt.setTitleColor(UIColor(red: 0.07, green: 0.32, blue: 0.89, alpha: 1.0), for: UIControlState.normal)
bt.addTarget(self, action: #selector(linkOut), for: .touchUpInside)
return bt
}()
button.sizeToFit()
contentView.addSubview(button)
button.anchor(bottomAnchor, left: self.leftAnchor, bottom: nil, right: self.rightAnchor, topConstant: 20, leftConstant: 15, bottomConstant: 0, rightConstant: 15, widthConstant: 0, heightConstant: 0)
return button.bottomAnchor
}
@objc func linkOut(sender: LinkButton!){
let viewController: WebViewController = {
let pv = WebViewController()
pv.LinkString = sender.LinkString
return pv
}()
homeController?.navigationController?.pushViewController(viewController, animated: true)
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
答案 0 :(得分:1)
如果你只有3个静态单元格,我不认为tableView
实际上是有用的。如果有许多单元可以重复使用,那么UITableView
在性能方面非常有用 - 那么UI不必一直创建和保存整个UI,而只需要tableView
的可见部分。
在您的情况下,由于所有内容都被推送到一个单元格,我建议您只使用UIScrollView
。
或者(在大内容的情况下)使用tableView
每个段落有一个单元格。
答案 1 :(得分:0)
//您必须提供估计的最小细胞高度。 即
func tableView(_ tableView: UITableView, estimatedHeightForRowAt indexPath: IndexPath) -> CGFloat {
return 50.0
}
单元格可以调整大小超过此值。