Device.OnPlatform deprecated

Question

Inside the constructor of my ContentPage I try to set a platform dependent padding value:

Padding = new Thickness(5, Device.OnPlatform(20, 5, 5), 5, 5);

Visual Studio underlines Device.OnPlatform and when I hover the mouse pointer over the method call I get the following warning:

Devide.OnPlatform(T, T, T) is obsolete: 'Use switch(RuntimePlatform) instead'.

The code initially used is from the e-book 'Creating Mobile Apps with Xamarin.Forms Book' published in 2016. I 'm really surprised how fast this platform evolves!

Unfortunately I'm not aware of how Device.OnPlatform should be replaced using the way suggested by the warning.

Answer 1

2016 was the year this method became deprecated.

You're supposed to use a switch statement to determine the OS.

switch(Device.RuntimePlatform)
{
    case Device.iOS:
      return new Thickness(5, 5, 5, 0)
    default:
      return new Thickness(5, 5, 5, 0)
 }

You can of course wrap this inside a function which will do the same job as you wished to do with Device.OnPlatform, but instead of calling Device.OnPlatform you'll call your own function.

Answer 2

I resolved this by using inline ternary conditional operator, this assumes you want something different for just iOS

Padding = new Thickness(5, (Device.RuntimePlatform==Device.iOS?20:5), 5, 5);