UIView Frame vs. Bounds

The UIView class on iOS has several properties related to size and position, and some of them seem to overlap in functionality. It may not be obvious at first which ones to use when or whether there is even a difference, and as a result I have seen many people get confused by how these properties fit together, and many examples of them being used improperly. This post will try to explain how these properties work.

Navigation With MVVM

In my previous post I covered the basics of navigation patterns in mobile apps and the Xamarin.Forms navigation APIs. In this post I will cover architectural issues related to navigation in an app using the MVVM pattern and one method of implementing your navigation in a more portable way.

Navigation in Xamarin.Forms

Navigation is a fundamental concept in mobile applications. Desktop computers have relatively large screens that lend themselves to many modeless windows, which allows users to see multiple views at once switch between tasks quickly. Mobile devices, on the other hand, have small screens. It would be impractical in most cases to show multiple views at once (no matter what Samsung's marketing says). As a result, mobile applications tend to be designed around the concept of moving from one full-screen view to another. In this post I'll describe the most common types of navigation in mobile apps and how to use them in Xamarin.Forms.