在情节提要中设置动态tableview高度约束

试试这个-

如果您正在使用tableView单元格，则在cellForRowAt方法中添加以下代码

  cell.textLabel?.numberOfLines = 0
  cell.textLabel?.lineBreakMode = .byWordWrapping

并在其中设置UITableView的这些属性 viewDidLoad

self.tableView.tableFooterView = UIView()
self.tableView.estimatedRowHeight = 120 //Your estimated height
self.tableView.rowHeight = UITableViewAutomaticDimension

希望它能工作:)

检查以下完整代码：

import UIKit

class ViewController: UIViewController {
@IBOutlet weak var guestTView: UITableView!

var guests: [String]?

override func viewDidLoad() {
    super.viewDidLoad()
    self.guests = ["hi this is john and i am a ios developer gjjgjgjgjg hzsg bnfddf dfbdnvfvd bdhgfjgjfgn ngfjggffgfhgh hdfghfggsgg","hi this is john and i am a ios developer gjjgjgjgjg hzsg bnfddf dfbdnvfvd bdhgfjgjfgn ngfjggffgfhgh hdfghfggsg","hi this is john and i am a ios developer gjjgjgjgjg hzsg bnfddf dfbdnvfvd bdhgfjgjfgn ngfjggffgfhgh hdfghfggsg","hi this is john and i am a ios developer gjjgjgjgjg hzsg bnfddf dfbdnvfvd bdhgfjgjfgn ngfjggffgfhgh hdfghfggsg","hi this is john and i am a ios developer gjjgjgjgjg hzsg bnfddf dfbdnvfvd bdhgfjgjfgn ngfjggffgfhgh hdfghfggsg","hi this is john and i am a ios developer gjjgjgjgjg hzsg bnfddf dfbdnvfvd bdhgfjgjfgn ngfjggffgfhgh hdfghfggsg","hi this is john and i am a ios developer gjjgjgjgjg hzsg bnfddf dfbdnvfvd bdhgfjgjfgn ngfjggffgfhgh hdfghfggsg"]

    self.guestTView.estimatedRowHeight = 70.0
    self.guestTView.rowHeight = UITableViewAutomaticDimension
    self.guestTView.tableFooterView = UIView()

}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
 }

}

extension ViewController: UITableViewDelegate, UITableViewDataSource {

func numberOfSections(in tableView: UITableView) -> Int {
    return 1
}

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

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath)
    cell.textLabel?.numberOfLines = 0
    cell.textLabel?.lineBreakMode = .byWordWrapping
    cell.textLabel?.text = guests?[indexPath.row]

    return cell

 }

}