diff --git a/README.md b/README.md
index fa7f958..362381b 100644
--- a/README.md
+++ b/README.md
@@ -76,6 +76,8 @@ UIColor.defaultShadowImageHidden = true
 
 
 ## Update
+- **2020.08.17**
+解决问题：解决modal出来一个导航控制然后push到其他Vc，点击返回按钮crash的bug
 - **2017.12.09**
 解决问题：解决导航栏颜色和标题颜色改变失败的bug
 
diff --git a/WRNavigationBar_swift/.DS_Store b/WRNavigationBar_swift/.DS_Store
new file mode 100644
index 0000000..da8f635
Binary files /dev/null and b/WRNavigationBar_swift/.DS_Store differ
diff --git a/WRNavigationBar_swift/WRNavigationBar_swift.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist b/WRNavigationBar_swift/WRNavigationBar_swift.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
new file mode 100644
index 0000000..18d9810
--- /dev/null
+++ b/WRNavigationBar_swift/WRNavigationBar_swift.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>
diff --git a/WRNavigationBar_swift/WRNavigationBar_swift/WRNavigationBar/WRCustomNavigationBar.swift b/WRNavigationBar_swift/WRNavigationBar_swift/WRNavigationBar/WRCustomNavigationBar.swift
index 5066e10..94b1be8 100644
--- a/WRNavigationBar_swift/WRNavigationBar_swift/WRNavigationBar/WRCustomNavigationBar.swift
+++ b/WRNavigationBar_swift/WRNavigationBar_swift/WRNavigationBar/WRCustomNavigationBar.swift
@@ -57,7 +57,7 @@ extension UIViewController
             return wr_currentViewController(from: tabBarController.selectedViewController!)
         }
         else if fromVC.presentedViewController != nil {
-            return wr_currentViewController(from:fromVC.presentingViewController!)
+            return wr_currentViewController(from:fromVC.presentedViewController!)
         }
         else {
             return fromVC