Xamarin开发笔记—设备类&第三方弹窗的使用和注意事项
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:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 | //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/
二、第三方弹窗,模态窗口
先看效果图:
模态窗口git地址:https://github.com/rotorgames/Rg.Plugins.Popup
基本实现核心代码:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 | <?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:
1 | 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();
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