1、各種優秀UI例子
https://github.com/jsuarezruiz/xamarin-forms-goodlooking-UI
輸入框例子
https://github.com/enisn/Xamarin.Forms.InputKit
浮動操作按鈕
https://github.com/SuavePirate/Xamarin.Forms.Controls.FloatingActionButton
選項卡按鈕
https://github.com/UdaraAlwis/XFSegmentedControl
圓形按鈕
https://github.com/wilsonvargas/ButtonCirclePlugin
動畫按鈕
https://github.com/xamarinium/ButtonWithActivityIndicator
自定義后退按鈕
https://github.com/bbl-Laobu/CustomBackIconDemo
圖片按鈕
https://github.com/DelcoigneYves/Xam.Plugin.ImageButton
https://github.com/mariusmuntean/SimpleImageButton
工具欄按鈕
https://github.com/AmitManchanda/iOSSecondaryToolbarMenubar
https://github.com/wilsonvargas/GradientNavigationToolbarXamarinForms
導航欄bar自定義
https://github.com/thrive-now/BottomNavigationBarXF
https://github.com/CrossGeeks/CustomNavigationBarSample
本地通知插件：
https://github.com/thudugala/Plugin.LocalNotification
手寫簽名
https://github.com/xamarin/SignaturePad
https://github.com/search?l=C%23&p=2&q=signature&type=Repositories
Picker例子，下拉列表、時間選擇器
https://github.com/amay077/Xamarin_Forms_PickerViewSample 下拉列表
https://github.com/brminnick/InvestmentDataSampleApp 下拉列表，自動補全
https://github.com/CrossGeeks/ClearableDatePickerSample 時間選擇器
https://github.com/kirtisagar/XamarinFormsRadioButtonXAML 單選
