From 854c840112aff8ed7fe7caba80cbfe5ac8f2c3a0 Mon Sep 17 00:00:00 2001
From: zhongwuzw <zhongwuzw@qq.com>
Date: Fri, 10 Nov 2017 00:08:08 +0800
Subject: [PATCH] Fix crash for escaping block

---
 Sources/Views/InputBarItem.swift | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Sources/Views/InputBarItem.swift b/Sources/Views/InputBarItem.swift
index 7406d19b..77491ac2 100644
--- a/Sources/Views/InputBarItem.swift
+++ b/Sources/Views/InputBarItem.swift
@@ -183,8 +183,8 @@ open class InputBarButtonItem: UIButton {
     open func setSize(_ newValue: CGSize?, animated: Bool) {
         size = newValue
         if animated, let position = parentStackViewPosition {
-            messageInputBar?.performLayout(animated) {
-                self.messageInputBar?.layoutStackViews([position])
+            messageInputBar?.performLayout(animated) { [weak self] in
+                self?.messageInputBar?.layoutStackViews([position])
             }
         }
     }