ios - 当我使用 MvxSimpleTableViewSource 时，xamarin ios Tableview 没有重新加载

Question

只要源属性发生更改，我的 TableView 就不会更新。代码如下:

public override void ViewDidLoad()
    {
        base.ViewDidLoad();
        viewmodel = this.ViewModel as ListViewModel;
        viewmodel.PropertyChanged += HandlePropertyChangedEventHandler;;
        var source = new MvxSimpleTableViewSource( TableView, LaborCell.Key, LaborCell.Key);
        TableView.Source = source;
        var set = this.CreateBindingSet<ListView, ListViewModel>();
        set.Bind(source).To(vm => vm.LaborTransactions);
        set.Apply();
        TableView.ReloadData();
    }

View 模型:

        public class ListViewModel :MaxRawBaseViewModel
            {

          public ListViewModel():base()
                {
                    LoadLaborTransactions();
                }

         private Collection<LaborTransaction> _laborTransactions;

                public Collection<LaborTransaction> LaborTransactions
                {
                    get { return _laborTransactions; }     
                }

     public void LoadLaborTransactions()
            {
                _laborTransactions = DataService.GetLaborTransactions(somenumber);
                RaisePropertyChanged(() => LaborTransactions); 

            }

}

每当Transactions发生变化时，都会调用propertychanged方法上的tablview.reolad()。但它没有重新加载我的桌面 View

void HandlePropertyChangedEventHandler(object sender, System.ComponentModel.PropertyChangedEventArgs e){
            if (e.PropertyName.Equals("LaborTransactions"))
            {
                       TableView.ReloadData();
            }
    }

Answer 1

Collection<T>不实现INotifyPropertyChanged .您可以在文档 here 中验证这一点.您需要更改您的LaborTransactions属性为实现 INotifyPropertyChanged 的集合类型喜欢ObservableCollection<T>和 MvxObservableCollection<T> .你可以看到ObservableCollection<T>工具 INotifyPropertyChanged here

更改您的 LaborTransactions因此:

private ObservableCollection<LaborTransaction> _laborTransactions;
public ObservableCollection<LaborTransaction> LaborTransactions
{
    get { return _laborTransactions; }
    set {
        return _laborTransactions;
        RaisePropertyChanged(() => LaborTransactions);
    }
}