自动调整（动态高度）tableview单元格的问题
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。 它没有设置textview的文本，并且单元格在idCellTextView-cell的标准高度处结束。 我已经四处搜索并尝试使用自动布局中的固定来自单元格内的textview相对于内容视图和代码，如下所示。 ：
tableView.estimatedRowHeight = 70 tableView.rowHeight = UITableViewAutomaticDimension 与问题相关的其余视图控制器显示在：
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 } }
您必须将numberOfLines设置为0以允许单元格内的UILabel增长
尝试这个：
func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat { return UITableViewAutomaticDimension } func tableView(tableView: UITableView, estimatedHeightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat { return UITableViewAutomaticDimension }
这里的例子
尝试这个 –
确保首先在表视图单元格中正确添加约束。
然后从storyboard的Attributes inspector部分设置UILable的这两个属性：
1 – 行为0
2 – 换行到自动换行
注意 – 不要修复UILable的高度。
对于TextView –
你需要禁用滚动 。 它会工作。
我建议使用AutoLayout而不是自动resize。 设计UI元素简单易行。 以下步骤将帮助您，如何使用AutoLayout设计自动resize单元格。
要设置行高和估计行高的自动尺寸，请确保执行以下步骤，自动尺寸对单元格/行高度布局有效。
- 分配和实现dataSource和委托
- 将
UITableViewAutomaticDimension分配给rowHeight和estimatedRowHeight - 实现delegate / dataSource方法（即
heightForRowAt并向其返回值UITableViewAutomaticDimension）
–
@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
- 设置行数= 0（＆换行模式=截断尾部）
- 设置相对于其superview / cell容器的所有约束（顶部，底部，右侧）。
- 可选 ：如果您希望标签覆盖最小垂直区域，即使没有数据，也可以设置标签的最小高度。
