问题在于绑定到UIBarButtonItem，代码在Simulator上工作，但在设备上，属性Enable不起作用，Clicked Works ......
textViewItem中存在同样的问题，但这次文本或启用都不起作用。
public partial class ProcessDetailViewController : MvxBindingTouchViewController<ProcessDetailViewModel>
{
public ProcessDetailViewController (MvxShowViewModelRequest request)
: base (request,"ProcessDetailViewController", null)
{
}
public override void DidReceiveMemoryWarning ()
{
// Releases the view if it doesn't have a superview.
base.DidReceiveMemoryWarning ();
// Release any cached data, images, etc that aren't in use.
}
public override void ViewDidLoad ()
{
base.ViewDidLoad ();
this.AddBindings(
new Dictionary<object, string>()
{
{ this.lblSeguradoraNome , "{'Text':{'Path':'AssuranceCompanyID'}}" },
{ this.lblSeguradoraGestor , "{'Text':{'Path':'AssuranceManager'}}" },
{ this.lblApoliceData , "{'Text':{'Path':'InsurancePolicyStartDate'}}" },
{ this.lblApoliceNum , "{'Text':{'Path':'InsurancePolicyNumber'}}" },
{ this.lblApoliceRamo , "{'Text':{'Path':'InsurancePolicyBranch'}}" },
{ this.lblDataPedido , "{'Text':{'Path':'RequestDate'}}" },
{ this.lblGestor , "{'Text':{'Path':'InternalManager'}}" },
{ this.lblLocalRiscoCodPostal , "{'Text':{'Path':'InsurancedLocationAddressCityZipCode'}}" },
{ this.lblLocalRiscoConcelho , "{'Text':{'Path':'InsurancedLocationAddressCity'}}" },
{ this.lblLocalRiscoMorada , "{'Text':{'Path':'InsurancedLocationAddress'}}" },
{ this.lblPerito , "{'Text':{'Path':'Surveyer'}}" },
{ this.lblSeguradoCodPostal , "{'Text':{'Path':'InsuredPersonAddressCityZipCode'}}" },
{ this.lblSeguradoConcelho , "{'Text':{'Path':'InsuredPersonAddressCity'}}" },
{ this.lblSeguradoContacto , "{'Text':{'Path':'InsuredPersonPhone'}}" },
{ this.lblSeguradoMorada , "{'Text':{'Path':'InsuredPersonAddress'}}" },
{ this.lblSeguradoNome , "{'Text':{'Path':'InsuredPersonName'}}" },
{ this.btnDownload , "{'Clicked':{'Path':'DownloadProcessButton'},'Enabled':{'Path':'HideIfDownloaded'}}" },
{ this.btnTerminarVisita , "{'Clicked':{'Path':'EndVisitButton'},'Enabled':{'Path':'ShowIfOnVisit'}}" },
{ this.btnObterLocalizacao , "{'Clicked':{'Path':'AdquireLocationButton'},'Enabled':{'Path':'ShowIfOnVisit'}}" },
{ this.btnIniciarVisita , "{'Clicked':{'Path':'BeginVisitButton'},'Enabled':{'Path':'HideIfOnVisit'}}" },
{ this.btnTirarFoto , "{'Clicked':{'Path':'TakePhotoButton'},'Enabled':{'Path':'ShowIfOnVisit'}}" },
{ this.btnVoltar , "{'Clicked':{'Path':'ReturnButton'}}" },
{ this.btnUpload , "{'Clicked':{'Path':'UploadProcessButton'},'Enabled':{'Path':'CanUpload'}}" },
}
);
// var a= NavigationItem.LeftBarButtonItems[0].Enabled
// Perform any additional setup after loading the view, typically from a nib.
}
public override void ViewDidUnload ()
{
base.ViewDidUnload ();
// Clear any references to subviews of the main view in order to
// allow the Garbage Collector to collect them sooner.
//
// e.g. myOutlet.Dispose (); myOutlet = null;
ReleaseDesignerOutlets ();
}
public override bool ShouldAutorotateToInterfaceOrientation (UIInterfaceOrientation toInterfaceOrientation)
{
// Return true for supported orientations
return true;
}
}
public class ProcessDetailViewModel : ProcessNavigationBaseViewModel
{(...)}
public class ProcessNavigationBaseViewModel : BaseViewModel
{
(...)
#region Properties
private Process _currentProcess;
private static User _user;
private bool _isGPSLocationStarted;
private double _latitude;
private double _longitude;
private string _photoFilename = "";
public Process CurrentProcess
{
get
{
return _currentProcess;
}
set
{
_currentProcess = value;
FirePropertyChanged(() => CurrentProcess);
}
}
public User User
{
get { return _user; }
set
{
_user = value;
FirePropertyChanged(() => User);
}
}
private bool _isDownloaded
{
get
{
return CurrentProcess.IsLockedInServer && !(CurrentProcess.ProcessState == ProcessState.WaitingReportProduction.ToString());
}
set
{
CurrentProcess.IsLockedInServer = value;
FirePropertyChanged(() => ShowIfDownloaded);
FirePropertyChanged(() => HideIfDownloaded);
}
}
public bool ShowIfDownloaded
{
get { return _isDownloaded; }
}
public bool HideIfDownloaded
{
get { return !_isDownloaded; }
}
public bool CanUpload
{
get { return ( CurrentProcess.ProcessState == ProcessState.WaitingUpload.ToString()); }
}
public bool CanDownload
{
get { return (CurrentProcess.ProcessState != ProcessState.WaitingReportProduction.ToString() &&
CurrentProcess.ProcessState == ProcessState.WaitingSurveyorAcceptionDecision.ToString()) ; }
}
public bool ShowIfOnVisit
{
get { return (CurrentProcess.ProcessState == ProcessState.OnVisist.ToString()); }
}
public bool HideIfOnVisit
{
get { return (!(CurrentProcess.ProcessState == ProcessState.OnVisist.ToString())) && ShowIfDownloaded; }
}
public string ProcessDescription
{
get
{
return string.Format("{0} - {1}", CurrentProcess.ProcessNumber, CurrentProcess.RequestedService.RequestedServiceType);
}
}
(...)
}
提前致谢
[编辑]
应用程序输出： 2013-01-11 09：16：56.369 LinkFENACAMSIGEPMobileUIIPad [6496：c07] 导航：诊断：2.24使用args
导航到MainMenuViewModel2013-01-11 09：16：56.369 LinkFENACAMSIGEPMobileUIIPad [6496：c07] TouchNavigation：Diagnostic：2.24导航请求
2013-01-11 09:16:56.421 LinkFENACAMSIGEPMobileUIIPad [6496：c07] MvxBind：警告：2.29无法绑定到源为空
2013-01-11 09：16：56.423 LinkFENACAMSIGEPMobileUIIPad [6496：c07] MvxBind：警告：2.29无法绑定到源为空
[编辑20130111：11：12] - 链接器行为：仅限链接SDK程序集
类似于： MvvmCross Monotouch - Fail to bind Properties on a real iPad, but it works on the Simulator（我无法做到这一点......）
答案 0 :(得分：7)
我看不到示例代码中的barbutton - 所以我会根据Text，Clicked，Enabled等来回答。
如果这在Simulator中有效，但在设备上没有，则可能与链接器有关 - 与MvvmCross Monotouch - Fail to bind Properties on a real iPad, but it works on the Simulator
完全相同要测试此理论，请尝试将链接器转换为包含所有符号
假设这是问题的原因......然后要解决它，你需要包含一个LinkerPleaseInclude.cs文件，它会欺骗链接器包含这些属性。
例如，它可能看起来像：
public class LinkerIncludePlease
{
private void IncludeClicked(UIButton button)
{
button.Clicked += (s, e) => { };
}
private void IncludeEnabled(UIButton button)
{
button.Enabled = !button.Enabled;
}
private void IncludeText(UILabel label)
{
label.Text = label.Text + "test";
}
}
注意：此代码从未实际执行过，但在构建时由链接器进行分析。