Eduardo Rosas' Blog

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Dynamic-Colored Progress Bars - iOS Custom Renderer in Xamarin Forms

Using XAML in Xamarin Forms we can change the accent color of the Progress Bars we define, and being able to set it to a HEX value, the possibilities are endless (well, not exactly, only about 16 million, but you know what I mean).

But what if you want that color to change dynamically, say, depending on how much the progress bar is filled, especially if you're going to keep your code-behind as clean as possible, so no handling of events and messy code.

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Bottom Android TabBar - Xamarin Forms

Something that I haven't always liked about Android is the top-side tab bars. You know, those that can take you from one page to another very easily without reaching your finger too far onto the screen or opening a side menu. I love bottom tab bars, iOS has always had them, and I use them a lot.

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Handling Landscape and Portrait Modes in Xamarin Forms

In the previous post, I showed you how you could handle multiple states for a specific element using the VisualStateManager and defining various groups and VisualStates.

In this post, we will use this same feature to change the UI of an example application so that it hides a title when the device is on portrait mode, so there is more space for the main component of the interface, which will be a ListView.

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Handling Visual States in Xamarin Forms

If there is something that can take a good-looking app to an incredible-looking app that may very well be Visual States. By defining different Visual States you are able to define how a certain element must look depending on some interaction from the user. The simpler example is with buttons, with which you are able to see when someone hovers over them (perhaps they change color), someone presses them (maybe in addition to colors the scale also changes), maybe also when they lose focus.

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