ios – UILabel在启动时不在自定义UITableViewCell中执行多行,但在滚动后执行

您的自动布局非常完美,只是因为您在xib中使用默认文本设置自动布局而出现问题.并在您viewDidLoad中,您正在更新UILabel文本但不以编程方式更新布局.所以只留下一行如下.

self.mainTV.layoutIfNeeded();

在viewDidLoad方法中重新加载UITableView之前添加上面的行.所有的事情都很好.

示例：

override func viewDidLoad() {
    super.viewDidLoad()

    self.mainTV.datasource=self
    self.mainTV.delegate=self
    self.mainTV.rowHeight = UITableViewAutomaticDimension
    self.mainTV.estimatedRowHeight = 84.0
    //self.mainTV.registerClass(myTableViewCell.self,forCellReusEIDentifier: "MyCustomcatell")


    var tmps = [String]()

    tmps.append("ABC But here is an artist. He desires to paint you the dreamiest,shadiest,quietest,most enchanTing bit of romantic landscape in all the valley of the Saco. what is the chief element he employs?")
    tmps.append("DEF But here is an artist.")
    tmps.append("GHI But here is an artist. He desires to paint you the dreamiest,most enchanTing bit")

    for var i=0; i<10; i++
    {
      var menuItem=EKMenuItem()
      let randomIndex1 = Int(arc4random_uniform(UInt32(tmps.count)))
      menuItem.header = "\(i) \(tmps[randomIndex1])"

      let randomIndex2 = Int(arc4random_uniform(UInt32(tmps.count)))
      menuItem.detail = "\(i) \(tmps[randomIndex2])"
      let randomIndex3 = Int(arc4random_uniform(UInt32(tmps.count)))
      menuItem.price = "\(i) \(tmps[randomIndex3])"
      //tmpItem.price = "my price"
      dataItems.append(menuItem)
    }

    self.view.BACkgroundColor = UIColor.greenColor()

    self.mainTV.layoutIfNeeded();
    self.mainTV.reloadData()
    // Do any additional setup after loading the view,typically from a nib.
  }

希望这对你有所帮助.