在 Xamarin Forms 中加载页面时显示文本 [英] Display text while Page is loading in Xamarin Forms

问题描述

我有一个很重的页面，点击后加载了大约 1-2 秒.在这段时间里，我看到正在加载页面标题和旧页面内容，它看起来反应迟钝.我想要实现的只是显示带有正在加载..."或活动指示器等内容的临时标签，只要正在加载新页面，但我不知道如何执行此操作.实现这一目标的更好方法是什么?提前致谢

I have a page that is quite heavy and its loading for about 1-2 sec after click. During this time I see loading page header and old page content, it looks so irresponsive. All I want to achive is to display temporary Label with content like "Loading..." or activityindicator as long as new page is loading but I have no idea how to do this. What is the better way to achive this? Thanks in advance

推荐答案

根据您的评论，您只想在从 Api 加载数据时显示 Busy 指示器.您没有发布您的用户界面，但我希望您了解如何使用以下内容:

Based on your comments, you just want to display Busy indicator while you are loading the Data from your Api. You didn't posted your UI but I hope you understand how to use the below:

<Grid>
     <YOUR-UI>
         .....
         .........
     </YOUR-UI>

     <ActivityIndicator VerticalOptions="Center" IsVisible="{Binding IsBusy}" IsRunning="{Binding IsBusy}"/>
</Grid>

在您的 ViewModel 中，添加 IsBusy 属性如下:

In your ViewModel, Add IsBusy Property as below:

private bool _isBusy;
public bool IsBusy
{
    get{return _isBusy;}
    set { _isBusy=value; RaisePropertyChanged(); }
}

然后，当您调用 API 加载数据时，请执行以下操作:

Then when you are Calling the API to load your Data do something like:

public async void LoadDataFromApi()
{
    IsBusy=true;  //Show the Indicator
    var response= await YourService.Method();  //this is where you calling your api
    //do other stuffs if you need to do;
    IsBusy=false;   //Hide the Indicator
}

如果您需要更多帮助，请告诉我.

Let me know if you need anymore help.

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