Since these apps can be written in a single language, it only makes sense to want to write a single code base that would compile into separate apps for the different platforms and ultimately allow us to reach the world of Write Once, Run Everywhere/Anywhere. This sounds good on paper, but it wasn’t quite the case.
The page represent cross-platform mobile app screen. A page contains layouts and views to display app data and handle user interaction.
A Xamarin Forms page represents a View Controller in iOS or a Page in Windows Phone/UWP or an activity in Android. Xamarin forms have following different types of pages for displaying UI elements.
|Content Page||Contains a single view|
|MasterDetailPage||A page that has two panes for the page. Typically, the master will contain the likes of a menu with the detail the content.|
|NavigationPage||A page that contains a navigation bar. Pages are kept on a stack and can be jumped between. The Navigation bar can have navigation buttons as well as a title.|
|TabbedPage||A container page. The TabbedPage acts as a container holding the content pages associated with each tab.|
|CarouselPage||A page that allows for sweeping across to show other views.|
Xamarin views are the UI elements/controls displayed on the user interface, such as labels, buttons and text entry boxes. The basic views are shown in fig.
Xamarin forms views can be aligned vertically and horizontally using VerticalOptions and HorizontalOptions.
|StackLayout||Positions the child elements in a line. Most commonly used layout.|
|AbsoluteLayout||A view that positions child layouts at specified positions using anchors to define the placing and size.|
|RelativeLayout||Positions the elements relative to each other using constraints.|
|Grid||Arranges multiple views in rows and columns just like table.|
Xamarin Forms cells are specialized elements used for customization of items in a list. These describe how each item in a list should be drawn. Cells is used with ListViews and TableViews for items customization.
|EntryCell||A cell containing a label and single-line entry element.|
|SwitchCell||The same as a switch, but with a label before it.|
|TextCell||A cell containing both a primary and a secondary text field.|
|ImageCell||A text cell that also contains an image.|
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