自动调整（动态高度）表格视图单元格大小的问题

Question

我在UIViewController中有一个UITableView作为视图的一部分。我正在尝试根据文本的长度自动调整表格单元格的大小。它不会设置textview的文本，单元格将以idCellTextView单元格的标准高度结束。我已经四处搜索过，正在尝试从单元格内的文本视图相对于内容视图和代码在自动布局中使用固定，如下所示：

tableView.estimatedRowHeight = 70
tableView.rowHeight = UITableViewAutomaticDimension

与问题相关的视图控制器的其余部分显示在以下位置：

class ExperimentViewController: UIViewController, UITableViewDelegate, UITableViewDataSource, UITextViewDelegate {
var expId: String = ""
let experimentDescription: String = ""
var cellDescriptors: NSMutableArray!
var visibleRowsPerSection = [[Int]]()


let notificationCenter = NotificationCenter.default

override func viewDidLoad() {
    super.viewDidLoad()


    //TABLE CELLS
    loadCellDescriptors()
    tableView.tableFooterView = UIView()
    tableView.layoutMargins = UIEdgeInsets.zero
    tableView.separatorInset = UIEdgeInsets.zero
    tableView.delegate = self
    tableView.dataSource = self
    tableView.isHidden = true
    tableView.estimatedRowHeight = 70
    tableView.rowHeight = UITableViewAutomaticDimension
    tableView.register(UITableViewCell.self, forCellReuseIdentifier: "cellIdentifier")
    tableView.register(UINib(nibName: "CustomCell", bundle: nil), forCellReuseIdentifier: "idCellNormal")
    tableView.register(UINib(nibName: "HintCell", bundle: nil), forCellReuseIdentifier: "idCellTextView")


    //ADD VIEWS
    baseView.addSubview(backgroundImage)
    baseView.addSubview(foregroundImage)
    baseView.addSubview(nameLabel)
    baseView.addSubview(segmentedController)
    baseView.addSubview(descriptionText)
    baseView.addSubview(hint)
    baseView.addSubview(tableView)

}



/*
 Get property list for the different cells we want to have in the hint table
 */
func loadCellDescriptors() {
    if let path = Bundle.main.path(forResource: "CellDescriptor", ofType: "plist") {
        cellDescriptors = NSMutableArray(contentsOfFile: path)
        getIndicesOfVisibleRows()
        tableView.reloadData()
    }
}

/*
 Returns number of rows in a given section
 */
func tableView(_ tableView:UITableView, numberOfRowsInSection section:Int) -> Int {
    return visibleRowsPerSection[section].count
}

/*
 Returns number of sections in table
 */
func numberOfSectionsInTableView(tableView: UITableView) -> Int {
    /*if cellDescriptors != nil {
        return cellDescriptors.count
    }
    else {
        return 0
    }*/
    print(items.count)
    return 3
}

/*
 Sets up the cell contents
 */
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let currentCellDescriptor = getCellDescriptorForIndexPath(indexPath)
    let cell = tableView.dequeueReusableCell(withIdentifier: currentCellDescriptor["cellIdentifier"] as! String , for: indexPath) as! CustomCell

    if currentCellDescriptor["cellIdentifier"] as! String == "idCellNormal" {
        print("1")
        if currentCellDescriptor["primaryTitle"] != nil {
            cell.labelOfRow.text = "Hintet er"
            cell.accessoryType = UITableViewCellAccessoryType.disclosureIndicator
        }
    } else if currentCellDescriptor["cellIdentifier"] as! String == "idCellTextView" {

        cell.textView.delegate = self
        cell.textView.isEditable = false
        cell.textView.isSelectable = false
        cell.textView.isScrollEnabled = true
        cell.textView.text = "orem Ipsum er rett og slett dummytekst fra og for trykkeindustrien. Lorem Ipsum har vært bransjens standard for dummytekst helt siden 1500-tallet, da en ukjent boktrykker stokket en mengde bokstaver for å lage et prøveeksemplar av en bok. Lorem Ipsum har tålt tidens tann usedvanlig godt, og har i tillegg til å bestå gjennom fem århundrer også tålt spranget over til elektronisk typografi uten vesentlige endringer. Lorem Ipsum ble gjort allment kjent i 1960-årene ved lanseringen av Letraset-ark med avsnitt fra Lorem Ipsum, og senere med sideombrekkingsprogrammet Aldus PageMaker som tok i bruk nettopp Lorem Ipsum for dummytekst.orem Ipsum er rett og slett dummytekst fra og f"
    }
    cell.layoutMargins = UIEdgeInsets.zero

    return cell
}

/*
 Handles row selections
 Finds the index of the cell that was selected, checks if it is/can be expanded and animates in the additional rows
 */
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    let indexOfTappedRow = visibleRowsPerSection[indexPath.section][indexPath.row]
    let cellDescriptor = cellDescriptors[indexPath.section] as! NSMutableArray
    let cell = (cellDescriptors[indexPath.section] as! NSMutableArray)[indexOfTappedRow]
    var shouldExpandAndShowSubRows: Bool = false

    //Checks if cell is expandable, if it is we check if cell isn't already expanded. If it isn't we can expand the cell
    if (cell as AnyObject)["isExpandable"] as! Bool == true {
        shouldExpandAndShowSubRows = false
        if (cell as AnyObject)["isExpanded"] as! Bool == false {
            shouldExpandAndShowSubRows = true
        }
    }

    (cell as AnyObject).setValue(shouldExpandAndShowSubRows, forKey: "isExpanded")

    //Makes the cells inside the specific section visible
    for i in (indexOfTappedRow + 1)...(indexOfTappedRow + ((cell as AnyObject)["additionalRows"] as! Int)) {
        (cellDescriptor[i] as AnyObject).setValue(shouldExpandAndShowSubRows, forKey: "isVisible")
    }

    //Update the overview of the currently visible rows
    getIndicesOfVisibleRows()
    //Reload the sections to see the changes
    tableView.reloadSections(NSIndexSet(index: indexPath.section) as IndexSet, with: UITableViewRowAnimation.fade)
}

/*
 Get overview of the rows that are currently visible
 */
func getIndicesOfVisibleRows() {
    visibleRowsPerSection.removeAll()

    for currentSectionCells in cellDescriptors.objectEnumerator().allObjects as! [[[String:AnyObject]]] {
        var visibleRows = [Int]()

        for row in 0...((currentSectionCells).count - 1) {
            if currentSectionCells[row]["isVisible"] as! Bool == true {
                visibleRows.append(row)
            }
        }

        visibleRowsPerSection.append(visibleRows)
    }
}

/*
 Get cell descriptor from file for specific cell
 */
func getCellDescriptorForIndexPath(_ indexPath: IndexPath) -> [String: AnyObject] {
    let indexOfVisibleRow = visibleRowsPerSection[indexPath.section][indexPath.row]
    let cellDescriptor = (cellDescriptors[indexPath.section] as! NSMutableArray)[indexOfVisibleRow] as! [String: AnyObject]
    return cellDescriptor
}
}

Answer 1

我建议使用AutoLayout而不是自动调整大小。设计UI元素既简单又好。以下步骤将帮助您如何使用AutoLayout设计自动调整大小的单元格。

设置行高的自动尺寸

• 分配和实施数据源和委派
• 将 UITableView自动维度指定为行高度

-

@IBOutlet weak var table: UITableView!

override func viewDidLoad() {
    super.viewDidLoad()

    // Don't forget to set dataSource and delegate for table
    table.dataSource = self
    table.delegate = self

   // Set automatic dimensions for row height
    // Swift 4.2 onwards
    table.rowHeight = UITableView.automaticDimension
    table.estimatedRowHeight = UITableView.automaticDimension


    // Swift 4.1 and below
    table.rowHeight = UITableViewAutomaticDimension
    table.estimatedRowHeight = UITableViewAutomaticDimension

}



// UITableViewAutomaticDimension calculates height of label contents/text
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
    // Swift 4.2 onwards
    return UITableView.automaticDimension

    // Swift 4.1 and below
    return UITableViewAutomaticDimension
}

对于UITableviewCell中的标签实例

• 设置的行数 = 0 （

Answer 2

试试这个 -

确保首先在表视图单元格中正确添加约束。

然后从故事板的属性检查器部分设置UILable的这两个属性：

1-行到0

2-换行符到自动换行

注意-不要固定UILable的高度。

对于文本视图-

你需要禁用滚动。它会工作的。

Answer 3

试试这个：

func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
    return UITableViewAutomaticDimension
}

func tableView(tableView: UITableView, estimatedHeightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
    return UITableViewAutomaticDimension
}

这里举例