[英]OxyPlot in RecyclerView -MVVMCross Xamarin.Android
[英]MvxSpinner Binding Issue on Xamarin.Android MVVMCross
將Xamarin.Android與MVVMCross結合使用。 從MVXSpinner中選擇未綁定到模型中的SelectedYear
屬性的值時。 當加載頁面調試器進入SelectedYear
屬性時,但是當我從微調器中選擇值時,它想要進入SelectedYear
。 我沒有任何錯誤。 請任何人給我建議,我錯了。
在輸出窗口上發現綁定問題
MvxBind:警告:228.30無法為SelectedYear [0:]創建用於綁定SelectedItem的目標綁定。MvxBind:警告:228.30無法為SelectedYear的綁定SelectedItem創建目標綁定。11-09 11:50:03.756 I / mono-stdout(32419) :MvxBind:警告:228.30無法創建用於綁定SelectedYear的SelectedItem的目標綁定
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#FFFFFF"
android:orientation="vertical"
android:layout_alignParentRight="true"
android:layout_marginRight="50dp">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/Retread.Collection.UI.DroidPhone.DotYear"
style="@style/LabelTextView" />
<MvxSpinner
android:id="@+id/txtYear"
android:layout_width="20dp"
android:layout_height="wrap_content"
android:overlapAnchor="false"
local:MvxItemTemplate="@drawable/year_spinner"
local:MvxDropDownItemTemplate="@drawable/year_spinnerdropdown"
android:hint="@string/Retread.Collection.UI.DroidPhone.Year"
local:MvxBind="ItemsSource Year;SelectedItem SelectedYear"
style="@style/AppSpinnerStyle" />
Year_spinner.xml文件在下面。
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:local="http://schemas.android.com/apk/res-auto"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="18dip"
android:singleLine="true"
android:textColor="#000000"
local:MvxBind="Text DisplayYear"/>
Year_spinnerdropdown.xml文件如下。
<?xml version="1.0" encoding="utf-8"?>
<CheckedTextView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:local="http://schemas.android.com/apk/res-auto"
style="?android:attr/spinnerDropDownItemStyle"
android:singleLine="true"
android:background="#ffffff"
android:layout_width="match_parent"
android:layout_height="?android:attr/listPreferredItemHeight"
android:ellipsize="marquee"
local:MvxBind="Text DisplayYear" />
在視圖模型中,我具有以下屬性。 在Year Model中,我有一個Property DisplayYear
。
private List<YearModel> _Year;
public List<YearModel> Year
{
get
{
return _Year;
}
set
{
_Year = value;
RaisePropertyChanged(() => Year);
}
}
public YearModel SelectedYear
{
get
{
return Model.SelectedYear;
}
set
{
Model.SelectedYear = value;
RaisePropertyChanged(() => SelectedYear);
}
}
也許如果我發布對我有用的東西,它可以為您指明正確的方向。
微調:
<Mvx.MvxSpinner
style="@style/spinner"
android:background="@drawable/spinner_selector"
local:MvxItemTemplate="@layout/item_spinner"
local:MvxBind="ItemsSource Position; SelectedItem SelectedPosition"
android:id="@+id/positionSpinner" />
MvxItemTemplate:
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:local="http://schemas.android.com/apk/res-auto"
style="@style/Spinner.MyPlayers"
android:singleLine="true"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/dummy_title"
local:MvxBind="Text Caption" />
視圖模型:
protected int SelectedPositionId
{
get { return SelectedPosition == null ? 1 : SelectedPosition.Index; }
}
protected SpinnerItem _selectedPosition;
public virtual SpinnerItem SelectedPosition
{
get { return _selectedPosition; }
set
{
if (_selectedPosition != value)
{
_selectedPosition = value;
SettingsPreferences.SelectedPosition = SelectedPositionId;
RebuildLists(true);
RaisePropertyChanged(() => SelectedPosition);
RaisePropertyChanged(() => DisplayCleanSheets);
RaisePropertyChanged(() => FilteredPlayers);
}
}
}
List<SpinnerItem> _position;
public List<SpinnerItem> Position
{
get
{
if (_position != null)
return _position;
_position = new List<SpinnerItem>();
var values = (int[])Enum.GetValues(typeof(PositionEnumeration));
foreach (var val in values.Where(p => p > 0))
_position.Add(new SpinnerItem(val, SharedTextSource.GetText(Enum.GetName(typeof(PositionEnumeration), val))));
return _position;
}
}
SpinnerItem:
public class SpinnerItem
{
public SpinnerItem(int index, string caption, int primaryKeyId = 0, string tag = "")
{
Index = index;
Caption = caption;
PrimaryKeyId = primaryKeyId;
Tag = tag;
}
public int Index { get; private set; }
public string Caption { get; private set; }
public string Tag { get; private set; }
public int PrimaryKeyId { get; private set; }
public override string ToString()
{
return Caption;
}
public override bool Equals(object obj)
{
var rhs = obj as SpinnerItem;
if (rhs == null)
return false;
return rhs.Caption == Caption;
}
public override int GetHashCode()
{
return Caption == null ? 0 : Caption.GetHashCode();
}
}
在這里回答https://github.com/MvvmCross/MvvmCross-AndroidSupport/issues/80
您需要從Setup.cs調用MvxAppCompatSetupHelper.FillTargetFactories。 也許有一種方法可以通過插件架構實現自動化?
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