From d51db6f3b9cc7330cb445b365328cbfae17b20ab Mon Sep 17 00:00:00 2001
From: Ryan Nystrom <rnystrom@whoisryannystrom.com>
Date: Mon, 16 Oct 2017 17:36:46 -0400
Subject: [PATCH] Remove toast on pan completion and avoid recenter exception
 (#592)

---
 Classes/Systems/Toast.swift | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/Classes/Systems/Toast.swift b/Classes/Systems/Toast.swift
index d377e09a..a825c045 100644
--- a/Classes/Systems/Toast.swift
+++ b/Classes/Systems/Toast.swift
@@ -250,6 +250,7 @@ final class ToastManager {
         }
 
         func dismiss() {
+            invalidateTimer()
             animator.removeBehavior(springBehavior)
 
             UIView.animate(withDuration: 0.5, delay: 0, options: [.curveEaseInOut], animations: {
@@ -261,6 +262,9 @@ final class ToastManager {
         }
 
         func recenter() {
+            // UIDynamics will throw if adding the behavior back when the view has already been removed
+            guard view.superview != nil else { return }
+
             animator.removeBehavior(springBehavior)
             springBehavior.anchorPoint = anchor(view: view, viewController: viewController)
             animator.addBehavior(springBehavior)
@@ -347,7 +351,9 @@ final class ToastManager {
                     var center = toast.view.center
                     center.y = finalY
                     toast.view.center = center
-                })
+                }) { _ in
+                    toast.view.removeFromSuperview()
+                }
             } else {
                 toast.startTimer()
                 toast.animator.addBehavior(toast.springBehavior)