Xamarin开发笔记—设备类&第三方弹窗的使用和注意事项

骑猪看日落 2023-10-17 20:58 40阅读 0赞

**一、设备类是Xamarin重要开发组成部分，下面介绍一下设备类的主要用法：**

//唤醒打电话
    Device.OpenUri(new Uri("tel:180xxxxxxxx"));
    
    //打开网页
    Device.OpenUri(new Uri("http://vipstone.cnblogs.com/"));
    
    //判断当前运行平台
    Device.RuntimePlatform => Device.iOS, Device.Android, Device.WinPhone
    
    //设备类型平板、手机、桌面
    Device.Idiom => TargetIdiom.Phone, TargetIdiom.Tablet, TargetIdiom.Desktop
    
    //计数器延迟执行
    Device.StartTimer (new TimeSpan (0, 0, 60), () => {
    　　// do something every 60 seconds
    　　return true; // runs again, or false to stop
    });

更多Device相关信息请访问：[https://developer.xamarin.com/guides/xamarin-forms/platform-features/device/][https_developer.xamarin.com_guides_xamarin-forms_platform-features_device]

**二、第三方弹窗，模态窗口**

先看效果图：![172074-20170622151738991-1862607259.png][]

模态窗口git地址：[https://github.com/rotorgames/Rg.Plugins.Popup][https_github.com_rotorgames_Rg.Plugins.Popup]

基本实现核心代码：

<?xml version="1.0" encoding="utf-8" ?>
    <pages:PopupPage xmlns="http://xamarin.com/schemas/2014/forms"
                 xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
                 x:Class="ywgoapp.Pages.Upgrade.UpgradePrompt"
                 xmlns:pages="clr-namespace:Rg.Plugins.Popup.Pages;assembly=Rg.Plugins.Popup">
        <StackLayout VerticalOptions="Center" WidthRequest="290" HorizontalOptions="Center" Spacing="0">
            <AbsoluteLayout VerticalOptions="Start">
                <Image Source="upgrade_bgtop.png" WidthRequest="290" AbsoluteLayout.LayoutFlags="PositionProportional" AbsoluteLayout.LayoutBounds="0,0"></Image>
                <Label x:Name="lb_version" Text="版本升级" AbsoluteLayout.LayoutFlags="XProportional" AbsoluteLayout.LayoutBounds="0.5,74" FontSize="16" TextColor="White"></Label>
                <Image x:Name="img_close" IsVisible="False" Source="close3.png" HeightRequest="24" WidthRequest="24" AbsoluteLayout.LayoutFlags="XProportional" AbsoluteLayout.LayoutBounds=".96,52">
                    <Image.GestureRecognizers>
                        <TapGestureRecognizer Tapped="OnCloseTap"></TapGestureRecognizer>
                    </Image.GestureRecognizers>
                </Image>
            </AbsoluteLayout>
            <ScrollView Padding="30,20" MinimumHeightRequest="160" BackgroundColor="White">
                <Label x:Name="lb_content" Text="" FontSize="12"></Label>
            </ScrollView>
            <StackLayout Padding="50,0,50,10" BackgroundColor="White">
                <Button Text="立即升级" BackgroundColor="#4BC1D2" TextColor="White" Clicked="Button_Clicked">
                </Button>
            </StackLayout>
            <StackLayout Spacing="0">
                <Image Source="upgrade_bgbottom.png" WidthRequest="290" Aspect="AspectFill"></Image>
            </StackLayout>
        </StackLayout>
    </pages:PopupPage>

调用代码：

this.Navigation.PushPopupAsync(new UpgradePrompt());

弹窗要注意的点：

1.不想点击任何区域都消失的话，需要重新OnBackgroundClicked事件：return false；

2.手动关闭窗体：PopupNavigation.PopAsync()；

**Xamarin系列其他推荐**

--------------------

*  [《Xamarin开发笔记—WebView双项事件调用》][Xamarin_WebView]
 *  [《Xamarin开发笔记—百度在线语音合成》][Xamarin]
 *  [《Xamarin开发笔记—设备类&第三方弹窗的使用和注意事项》][Xamarin 1]

[https_developer.xamarin.com_guides_xamarin-forms_platform-features_device]: https://developer.xamarin.com/guides/xamarin-forms/platform-features/device/
[172074-20170622151738991-1862607259.png]: https://images2015.cnblogs.com/blog/172074/201706/172074-20170622151738991-1862607259.png
[https_github.com_rotorgames_Rg.Plugins.Popup]: https://github.com/rotorgames/Rg.Plugins.Popup
[Xamarin_WebView]: http://www.cnblogs.com/vipstone/p/6957535.html
[Xamarin]: http://www.cnblogs.com/vipstone/p/6963763.html
[Xamarin 1]: http://www.cnblogs.com/vipstone/p/7064636.html