Xamarin開發筆記—設備類&第三方彈窗的使用和注意事項

1、設備類是Xamarin重要開發組成部分，下面介紹一下設備類的主要用法：

//喚醒打電話
Device.OpenUri(new Uri("tel:180xxxxxxxx"));

//打開網頁
Device.OpenUri(new Uri("http://vipstone.cnblogs.com/"));

//判斷當前運行平臺
Device.RuntimePlatform => Device.iOS, Device.Android, Device.WinPhone

//設備類型平板、手機、桌面
Device.Idiom => TargetIdiom.Phone, TargetIdiom.Tablet, TargetIdiom.Desktop

//計數器延遲執行
Device.StartTimer (new TimeSpan (0, 0, 60), () => {
　　// do something every 60 seconds
　　return true; // runs again, or false to stop
});

更多Device相關信息請訪問：https://developer.xamarin.com/guides/xamarin-forms/platform-features/device/

2、第三方彈窗，模態窗口

先看效果圖：

模態窗口git地址：https://github.com/rotorgames/Rg.Plugins.Popup

基本實現核心代碼：

<?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="版本升級" 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="當即升級" 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>

調用代碼：

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

彈窗要注意的點：

1.不想點擊任何區域都消失的話，須要從新OnBackgroundClicked事件：return false；

2.手動關閉窗體：PopupNavigation.PopAsync()；

 

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• 《Xamarin開發筆記—設備類&第三方彈窗的使用和注意事項》