MvvmCross無法在iPhone上爲EditingDidBegin創建目標綁定

Question

我有一個綁定到EditingDidBegin的應用程序。它適用於iPhone模擬器（的iOS 7），而精對實際的iPhone，我得到以下警告消息在運行時：

MvxBind：警告：1.29無法創建目標結合爲以EditingDidBegin

的綁定代碼對照是：

var set = this.CreateBindingSet<InventoryBalanceView, InventoryBalanceViewModel>(); 
set.Bind(StoreroomLabel).To(vm => vm.StoreRoomCaption); 
set.Bind(StoreroomTextField).To(vm => vm.StoreRoom); 
set.Bind(ItemNumberLabel).To(vm => vm.ItemNumberCaption); 
set.Bind(ItemNumberTextField).To(vm => vm.ItemNumber); 
set.Bind(BinNumberLabel).To(vm => vm.BinNumberCaption); 
set.Bind(BinNumberTextField).To(vm => vm.BinNumber); 
set.Bind(QuantityLabel).To(vm => vm.QuantityCaption); 
set.Bind(QuantityTextField).To(vm => vm.Quantity); 
set.Bind(SubmitButton).To(vm => vm.SetFocusCommand); 
set.Bind(DeleteButton).To(vm => vm.DeleteCommand); 
     set.Bind(NavigationItem.RightBarButtonItem).To(vm => vm.ScanStoreRoomCommand); 
set.Bind(DeleteButton).For(b => b.Hidden).To(vm => vm.IsDeleteButtonHidden); 

set.Bind(SubmitButton).For("Title").To(vm => vm.SubmitButtonTitle); 
set.Bind(DeleteButton).For("Title").To(vm => vm.DeleteButtonTitle); 

set.Bind(StoreroomTextField).For("EditingDidBegin").To(vm => vm.SetFocusCommand).CommandParameter("StoreRoom"); 
set.Bind(ItemNumberTextField).For("EditingDidBegin").To(vm => vm.SetFocusCommand).CommandParameter("ItemNumber"); 
set.Bind(BinNumberTextField).For("EditingDidBegin").To(vm => vm.SetFocusCommand).CommandParameter("BinNumber"); 
set.Bind(QuantityTextField).For("EditingDidBegin").To(vm => vm.SetFocusCommand).CommandParameter("Quantity"); 

set.Apply(); 

我沒有更改項目設置以鏈接的所有組件，但是這似乎並沒有有任何關於這個問題的影響。

任何想法我的代碼有什麼問題，或者如何解決問題？

感謝您的幫助！

Answer 1

這種類型的消息 - 加上'它在模擬器中工作'的證據 - 幾乎總是意味着鏈接器已經刪除了符號。

您可以添加一行到「LinkerPleaseIgnore.cs」（或其他文件）的鏈接，使其包含該事件，而不是「將項目設置更改爲鏈接所有程序集」。

例如包括像https://github.com/slodge/NPlus1DaysOfMvvmCross/blob/master/N-38-Maps/Mappit.Touch/LinkerPleaseInclude.cs一個文件的方法，如：

public void Include(UITextField textField) 
    { 
     textField.Text = textField.Text + ""; 
     textField.EditingChanged += (sender, args) => { textField.Text = ""; }; 
     textField.EditingDidBegin += (sender, args) => { textField.Text = ""; }; 
     textField.EditingDidBegin -= (sender, args) => { textField.Text = ""; }; 
    } 

這將希望招鏈接到包括textField.EditingDidBegin符號