diff --git a/AXWebViewController/AXWebViewController/AXWebViewController.m b/AXWebViewController/AXWebViewController/AXWebViewController.m
index d56862b..c447f3c 100644
--- a/AXWebViewController/AXWebViewController/AXWebViewController.m
+++ b/AXWebViewController/AXWebViewController/AXWebViewController.m
@@ -504,10 +504,19 @@ - (void)dealloc {
 #if AX_WEB_VIEW_CONTROLLER_USING_WEBKIT
     _webView.UIDelegate = nil;
     _webView.navigationDelegate = nil;
-    [_webView removeObserver:self forKeyPath:@"estimatedProgress"];
-    [_webView removeObserver:self forKeyPath:@"scrollView.contentOffset"];
-    [_webView removeObserver:self forKeyPath:@"title"];
-    // [_webView.scrollView removeObserver:self forKeyPath:@"backgroundColor"];
+    @try{
+        [_webView removeObserver:self forKeyPath:@"estimatedProgress"];
+        [_webView removeObserver:self forKeyPath:@"scrollView.contentOffset"];
+        [_webView removeObserver:self forKeyPath:@"title"];
+        // [_webView.scrollView removeObserver:self forKeyPath:@"backgroundColor"];
+    }
+    @catch (NSException *exception) {
+        NSLog(@"%@", exception.reason);
+    }
+    @finally {
+        NSLog(@"remove webview Observer fail");
+    }
+
 #else
     _webView.delegate = nil;
 #endif