如何在 android MvvmCross Xamarin 中设置 ProgressBar 的可见性 [英] How to set visibility for ProgressBar in android MvvmCross Xamarin

问题描述

我正在尝试将 ProgressBar 的 visibility 设置为 GONE.

I am trying to set visibility for ProgressBar as GONE.

在 XML 中

<?xml version="1.0" encoding="utf-8"?>
<ProgressBar 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"
    local:MvxBind="Visibility Visibility(ProgressVisibility)"
    android:background="@drawable/sel_custom_progress" />

在 ViewModel

private bool _progressVisibility;
public bool ProgressVisibility
{
    get { return _progressVisibility; }
    set { _progressVisibility = value; RaisePropertyChanged(() => ProgressVisibility); }
}

<小时>

我正在设置 ProgressVisibility = false;

发生了什么:视图仍然可见，没有被隐藏.如何解决这个问题.

What is happening: The view is still visible and not getting hidden. How to resolve this.

推荐答案

您需要为 Visibility 创建自定义值转换器，或者您可以使用 可见性插件

You need to create a custom value converter for Visibility or you can use Visibility plugin

public class MyVisibilityValueConverter : MvxBaseVisibilityValueConverter<bool>
{
    protected override MvxVisibility Convert(string value, object parameter, CultureInfo culture)
    {
        return (value ==true) ? MvxVisibility.Visible : MvxVisibility.Collapsed;
    }
}

xml:

local:MvxBind="Visibility ProgressVisibility,Converter=MyVisibility

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