Xamarin和XCode：调整UIView和UITableView的大小

Question

我有一个很长的屏幕（很多字段）。在XCode的结构：

View 
    ScrollView 
    View 
     View 
     . 
     . 
     . 
     TableContainer (View) 
     TableView 

TableContainer和的TableView具有高度。 当我在页面上 - 我设置高度TableView高度根据项数和增加TableView根据项目数量。 所有作品都可以。 但是，当我旋转设备 - TableView消失（高度重置为）。

类：

public partial class TrackingView: BaseView<TrackingViewModel> 
    { 
     public TrackingView() : base("TrackingView") 
     { 
     } 

     public override void ViewDidLoad() 
     { 
      base.ViewDidLoad(); 

      var source = new RetrieveShipmentDetailsViewSource(PortsTable, ShipmentDetailsCell.Key, ShipmentDetailsCell.Key); 
      PortsTable.Source = source; 

      var set = this.CreateBindingSet<TrackingModel, TrackingViewModel>(); 

      set.Bind(ShipmentLabel).To(vm => vm.ShipmentNumber); 
      set.Bind(CustCodeLabel).To(vm => vm.Shipment.CustomerCode); 
      set.Bind(CustNameLabel).To(vm => vm.Shipment.CustomerName); 
     ); 

      ViewModel.ShipmentLoadedSuccess += (sender, e) => 
      { 
       InvokeOnMainThread(delegate 
       { 
        PortsTable.ReloadData(); 
        UpdateView(); 
       }); 
      }; 

      PortsTable.SeparatorStyle = UITableViewCellSeparatorStyle.None; 
      PortsTable.ReloadData(); 

      set.Apply();    
     } 

     private void UpdateView() 
     { 
      if (ViewModel.Shipment != null && ViewModel.Shipment.VesselPorts != null) 
      { 
       PortsTable.ContentSize = new CGSize(MainView.ContentSize.Width, (ViewModel.Shipment.VesselPorts.Count * 200) + 55); 
       PortsTable.Frame = new CGRect(PortsTable.Frame.X, PortsTable.Frame.Y, PortsTable.Frame.Size.Width, 
               (ViewModel.Shipment.VesselPorts.Count * 200) + 55); 
       MainView.ContentSize = new CGSize(MainView.ContentSize.Width, 
                MainView.ContentSize.Height + (ViewModel.Shipment.VesselPorts.Count * 200) + 55); 
      } 
     } 
    } 

我在新的iOS和我知道我的结构是不好的。 请教，如何重新加载TableView and ScrollView。 请帮助我。

- (void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id <UIViewControllerTransitionCoordinator>)coordinator NS_AVAILABLE_IOS(8_0); 

它在Xcode与Objective-C的像这样实现：

- (void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator { 

    [super viewWillTransitionToSize:size withTransitionCoordinator:coordinator]; 

    // Code here will execute before the rotation begins. 
    // Equivalent to placing it in the deprecated method -[willRotateToInterfaceOrientation:duration:]. 
    [coordinator animateAlongsideTransition:^(id<UIViewControllerTransitionCoordinatorContext> context) { 
     // Place code here to perform animations during the rotation. 
     // You can pass nil for this closure if not necessary. 
     // Reorganize views, or move child view controllers. 
     if (UIInterfaceOrientationIsLandscape([UIApplication sharedApplication].statusBarOrientation)) { 

      //Update UI 
     } 

     if (UIInterfaceOrientationIsPortrait([UIApplication sharedApplication].statusBarOrientation)) { 

      //Update UI 
     } 

    }completion:^(id<UIViewControllerTransitionCoordinatorContext> context){ 
            // Code here will execute after the rotation has finished. 
            // Equivalent to placing it in the deprecated method -[didRotateFromInterfaceOrientation:]. 
            // Do any cleanup, if necessary. 

           }]; 
} 

它也可以发现

Answer 1

在Xcode中，当旋转设备使用此API更新您的UI Xamarin.iOS，ViewWillTransitionToSize。它可以用这样的C＃实现：

public override void ViewWillTransitionToSize(CGSize toSize, IUIViewControllerTransitionCoordinator coordinator) 
    { 
     base.ViewWillTransitionToSize(toSize, coordinator); 

     coordinator.AnimateAlongsideTransition((IUIViewControllerTransitionCoordinatorContext) => { 

      if (UIApplication.SharedApplication.StatusBarOrientation == UIInterfaceOrientation.Portrait || UIApplication.SharedApplication.StatusBarOrientation == UIInterfaceOrientation.PortraitUpsideDown) 
      { 
       //Update UI 
      } 

      if (UIApplication.SharedApplication.StatusBarOrientation == UIInterfaceOrientation.LandscapeLeft|| UIApplication.SharedApplication.StatusBarOrientation == UIInterfaceOrientation.LandscapeRight) 
      { 
       //Update UI 
      } 

     }, (IUIViewControllerTransitionCoordinatorContext) => { 
      //Transition Completion 
     }); 
    }