patridge

public class SomeButton : Button {
    public string ExampleThing {
      get { return (string)GetValue(ExampleThingBindableProperty); }
      set { SetValue(ExampleThingBindableProperty, value); }
    }

    public static readonly BindableProperty ExampleThingBindableProperty =
      BindableProperty.Create(nameof(ExampleThing), typeof(string), typeof(Button), default(string));
}

patridge

public static class DateTimeExtensions
{
	static readonly DateTime Epoch = new DateTime (1970, 1, 1, 0, 0, 0, DateTimeKind.Utc);
	public static string AsObjectIdPrefix (this DateTime dateTime)
	{
		var deltaSinceEpoch = dateTime - Epoch;
		var seconds = (int)deltaSinceEpoch.TotalSeconds;
		var secondsAsHex = seconds.ToString ("X").PadLeft (8, '0').ToLowerInvariant ();
		return secondsAsHex;
	}

patridge

// If you don't want to pull the whole [Splat](https://github.com/paulcbetts/splat) library over just for colors,
// here are a couple functions to help.
// Store your color values as hex-based `long`s and just convert them to native colors when you use them.
// NOTE: iOS uses RGBA floats (0..1) and Android uses ARGB ints (0..255) when converting.

// Usage example:
SomeView.SetBackgroundColor(MyAppColors.SomeGrayHighlight.AsNative());

// Core library can hold your colors:
public static class MyAppColors {

patridge

// LICENSE: MIT
public class UITableViewWithoutLayoutMargins : UITableView {
    void InitializeWithoutMargins() {
        // iOS 7
        if (RespondsToSelector(new Selector("setSeparatorInset:"))) {
            SeparatorInset = UIEdgeInsets.Zero;
        }
        // iOS 8[+?]
        if (RespondsToSelector(new Selector("setLayoutMargins:"))) {
            LayoutMargins = UIEdgeInsets.Zero;

patridge

// I had to use this to debug why `OnOptionsItemSelected` wasn't triggering for an ActionBar home tap.
// Turns out, `Resource.Id.home` and `Resource.Id.homeAsUp` are not related to `Android.Resource.Id.Home`.

var projectIdType = typeof(Resource.Id);
foreach (var field in projectIdType.GetFields(System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Static)) {
    if (item.ItemId == (int)field.GetValue(null)) {
        Console.WriteLine("{0}: {1}", field.Name, item.ItemId);
    }
}
var androidIdType = typeof(Android.Resource.Id);

patridge

using System;
using Foundation;
using UIKit;
using CoreGraphics;
using BigTed;
using System.Threading.Tasks;
using System.Linq;
using ObjCRuntime;

namespace HudOverTabsSample {

patridge

public static class TaskHelper {
    public static Task CompletedTask = AsCompletedTask(true);
    public static Task<T> AsCompletedTask<T>(T result) {
        TaskCompletionSource<T> precompletedSource = new TaskCompletionSource<T>();
        precompletedSource.SetResult(result);
        return precompletedSource.Task;
    }
    public static void TrySetResultTask<TResult>(this TaskCompletionSource<TResult> tcs, Task<TResult> task) {
        if (task == null) {
            throw new ArgumentNullException("task");

patridge

using System;

using Android.App;
using Android.Content;
using Android.Gms.Analytics; // via Google Play Services Xamarin Component (v19.0.0.1)
using Android.Gms.Analytics.Ecommerce;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.OS;

patridge

// Xamarin.iOS (using MonoTouch.UIKit;)
static Random rand = new Random();
public static UIColor GetRandomColor() {
	int hue = rand.Next(255);
	UIColor color = UIColor.FromHSB(
		(hue / 255.0f),
		1.0f,
		1.0f);
	return color;
}

patridge

NSObject keyboardShowObserver;
NSObject keyboardHideObserver;
public override void ViewWillAppear(bool animated) {
    base.ViewWillAppear(animated);

    keyboardShowObserver = NSNotificationCenter.DefaultCenter.AddObserver(UIKeyboard.WillShowNotification, (notification) => {
        NSValue nsKeyboardBounds = (NSValue)notification.UserInfo.ObjectForKey(UIKeyboard.BoundsUserInfoKey);
        RectangleF keyboardBounds = nsKeyboardBounds.RectangleFValue;
        float height = View.Bounds.Height - keyboardBounds.Height;
        if (NavigationController != null && NavigationController.TabBarController != null && NavigationController.TabBarController.TabBar != null) {