diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2022b3b..47ecbc8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Change Log
 
+## 1.2.1 unreleased
+
+* add: alertViewBackgroundWidth delegate method
+
+
 ## [1.1.4](https://github.com/dogo/SCLAlertView/tree/1.1.4) (2018-06-19)
 [Full Changelog](https://github.com/dogo/SCLAlertView/compare/1.1.3...1.1.4)
 
diff --git a/SCLAlertView-Objective-C.podspec b/SCLAlertView-Objective-C.podspec
index cfb5881..e69b0d1 100644
--- a/SCLAlertView-Objective-C.podspec
+++ b/SCLAlertView-Objective-C.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |spec|
   spec.name         = "SCLAlertView-Objective-C"
-  spec.version      = "1.2.0"
+  spec.version      = "1.2.1"
   spec.summary      = "Beautiful animated Alert View. Written in Swift but ported to Objective-C"
   spec.homepage     = "https://github.com/dogo/SCLAlertView"
   spec.screenshots  = "https://raw.githubusercontent.com/dogo/SCLAlertView/master/ScreenShots/ScreenShot.png", "https://raw.githubusercontent.com/dogo/SCLAlertView/master/ScreenShots/ScreenShot2.png"
diff --git a/SCLAlertView/SCLAlertView.m b/SCLAlertView/SCLAlertView.m
index 20a22dc..d9f6962 100755
--- a/SCLAlertView/SCLAlertView.m
+++ b/SCLAlertView/SCLAlertView.m
@@ -1161,6 +1161,18 @@ - (SCLForceHideBlock)forceHideBlock:(SCLForceHideBlock)forceHideBlock
 
 - (CGRect)mainScreenFrame
 {
+    if (_rootViewController) {
+        if ([_rootViewController respondsToSelector:@selector(alertViewBackgroundWidth)]) {
+            NSInvocationOperation *invo = [[NSInvocationOperation alloc] initWithTarget:_rootViewController selector:@selector(alertViewBackgroundWidth) object:nil];
+            [invo start];
+            CGFloat width = 0;
+            [invo.result getValue:&width];
+            CGRect rect = [UIApplication sharedApplication].keyWindow.bounds;
+            rect.size.width = width;
+            return rect;
+        }
+    }
+    
     return [self isAppExtension] ? _extensionBounds : [UIApplication sharedApplication].keyWindow.bounds;
 }