swift - UITableViewAutomaticDimension 不适用于调整单元格高度

Question

只要我不尝试启用自动调整大小，我的单元格就可以正常显示。当我在我的 viewController 中添加用于自动调整大小的两行时，个人资料图片、用户名和日期下的所有内容都会消失(该单元格应该看起来像 Instagram 在您单击图片时所做的那样)。

如果我注释掉 tableView.rowHeight = UITableViewAutomaticDimension
tableView.estimatedRowHeight = 450然后单元格将完全按照预期显示，但显然不会调整大小。

这是我目前的代码:在我的 tableViewController 中:

tableView.rowHeight = UITableViewAutomaticDimension
    tableView.estimatedRowHeight = 450

在我的 cellViewController 中

@IBOutlet weak var profilePic: UIImageView!
@IBOutlet weak var usernameBtn: UIButton!
@IBOutlet weak var dateLbl: UILabel!

@IBOutlet weak var mainPic: UIImageView!

@IBOutlet weak var likeBtn: UIButton!
@IBOutlet weak var commentBtn: UIButton!
@IBOutlet weak var moreBtn: UIButton!

@IBOutlet weak var likeLbl: UILabel!
@IBOutlet weak var titleLbl: UILabel!

@IBOutlet weak var uuidLbl: UILabel!

override func awakeFromNib() {
    super.awakeFromNib()

    let width = UIScreen.main.bounds.width

    //allow constraints
    profilePic.translatesAutoresizingMaskIntoConstraints = false
    usernameBtn.translatesAutoresizingMaskIntoConstraints = false
    dateLbl.translatesAutoresizingMaskIntoConstraints = false

    mainPic.translatesAutoresizingMaskIntoConstraints = false

    likeBtn.translatesAutoresizingMaskIntoConstraints = false
    commentBtn.translatesAutoresizingMaskIntoConstraints = false
    moreBtn.translatesAutoresizingMaskIntoConstraints = false

    likeLbl.translatesAutoresizingMaskIntoConstraints = false
    titleLbl.translatesAutoresizingMaskIntoConstraints = false

    uuidLbl.translatesAutoresizingMaskIntoConstraints = false

    let pictureWidth = width - 20

    //constraints
    //vertical constraints: objects that are directly above or below each other are in same constraint, if not vertical it must go in another constraint
    contentView.addConstraints(NSLayoutConstraint.constraints(
        //V: = vertical constraint ; | = top border ; -5-[profilePic(30)] make profilePic with height of 30 and place 5 points below top border ; -10-[mainPic(\(pictureWidth))] make pic with height of pictureWidth and place 10 points below profilePic ; -5-[like(30)] make like button height 30 points and put 5 points below mainPic
        withVisualFormat: "V:|-10-[profilePic(30)]-10-[mainPic(\(pictureWidth))]-5-[like(30)]-5-[title]",
        options: [], metrics: nil, views: ["profilePic":profilePic, "mainPic":mainPic, "like":likeBtn, "title":titleLbl]))

    contentView.addConstraints(NSLayoutConstraint.constraints(
        //place username 5 points below top border
        withVisualFormat: "V:|-10-[username]",
        options: [], metrics: nil, views: ["username": usernameBtn]))

    contentView.addConstraints(NSLayoutConstraint.constraints(
        //place comment button 10 points below mainPic
        withVisualFormat: "V:[mainPic]-5-[comment]",
        options: [], metrics: nil, views: ["mainPic":mainPic, "comment":commentBtn]))

    contentView.addConstraints(NSLayoutConstraint.constraints(
        withVisualFormat: "V:|-10-[date]",
        options: [], metrics: nil, views: ["date":dateLbl]))

    contentView.addConstraints(NSLayoutConstraint.constraints(
        withVisualFormat: "V:[mainPic]-10-[likes]",
        options: [], metrics: nil, views: ["mainPic":mainPic, "likes":likeLbl]))

    contentView.addConstraints(NSLayoutConstraint.constraints(
        withVisualFormat: "V:[mainPic]-5-[more]",
        options: [], metrics: nil, views: ["mainPic":mainPic, "more":moreBtn]))

    contentView.addConstraints(NSLayoutConstraint.constraints(
        withVisualFormat: "H:|-10-[profilePic(30)]-10-[username]-10-|",
        options: [], metrics: nil, views: ["profilePic":profilePic, "username":usernameBtn]))

    contentView.addConstraints(NSLayoutConstraint.constraints(
        withVisualFormat: "H:|-10-[mainPic]-10-|",
        options: [], metrics: nil, views: ["mainPic":mainPic]))

    contentView.addConstraints(NSLayoutConstraint.constraints(
        withVisualFormat: "H:|-15-[like(30)]-10-[likes]-30-[comment]",
        options: [], metrics: nil, views: ["like":likeBtn, "likes":likeLbl, "comment":commentBtn]))

    contentView.addConstraints(NSLayoutConstraint.constraints(
        withVisualFormat: "H:[more]-15-|",
        options: [], metrics: nil, views: ["more":moreBtn]))

    contentView.addConstraints(NSLayoutConstraint.constraints(
        withVisualFormat: "H:|-15-[title]-15-|",
        options: [], metrics: nil, views: ["title":titleLbl]))

    contentView.addConstraints(NSLayoutConstraint.constraints(
        withVisualFormat: "H:[date]-10-|",
        options: [], metrics: nil, views: ["date":dateLbl]))

}

Answer 1

试试这段代码:

注意:这两种方法都应该有效。已在 Swift 3 中测试。

方法一:

 func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {

   tableView.estimatedRowHeight = 44.0 // standard tableViewCell height
   tableView.rowHeight = UITableViewAutomaticDimension

 return yourArrayName.count
 }

方法二:

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

  tableView.estimatedRowHeight = 44.0 // standard tableViewCell height
  tableView.rowHeight = UITableViewAutomaticDimension

 return UITableViewAutomaticDimension
 }

 override func tableView(_ tableView: UITableView, estimatedHeightForRowAt indexPath: IndexPath) -> CGFloat {
 return UITableViewAutomaticDimension
 }

注意:您可能需要将此代码放入您的 cellForRowAt

    yourCellName.sizeToFit()
    cell.textLabel?.numberOfLines = 0

输出: