From b5f65b6fdfcb82256cd5d185b83d1169f831096b Mon Sep 17 00:00:00 2001
From: panxi <xinleiryan.pan@verizonwireless.com>
Date: Thu, 9 May 2019 10:50:36 -0400
Subject: [PATCH] update checkbox for crash

---
 MVMCoreUI/Atoms/Views/MVMCoreUICheckBox.m | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/MVMCoreUI/Atoms/Views/MVMCoreUICheckBox.m b/MVMCoreUI/Atoms/Views/MVMCoreUICheckBox.m
index ff46aa6a..0158beb1 100644
--- a/MVMCoreUI/Atoms/Views/MVMCoreUICheckBox.m
+++ b/MVMCoreUI/Atoms/Views/MVMCoreUICheckBox.m
@@ -342,8 +342,10 @@ static const CGFloat CheckBoxHeightWidth = 18.0;
         [self.checkMark updateCheckSelected:NO animated:animated];
     }
     
-    FormValidator *formValidator = ((MVMCoreUIDelegateObject *)self.delegate).formValidationProtocol.formValidatorModel;
-    [formValidator enableByValidation];
+    if (self.delegate && [self.delegate respondsToSelector:@selector(formValidationProtocol)] && [[self.delegate performSelector:@selector(formValidationProtocol)] respondsToSelector:@selector(formValidatorModel)]) {
+        FormValidator *formValidator = [[self.delegate performSelector:@selector(formValidationProtocol)] performSelector:@selector(formValidatorModel)];
+        [formValidator enableByValidation];
+    }
 }
 
 - (void)setColor:(nullable UIColor *)color forState:(UIControlState)state {