I got the solution. We need to set false for this parameter in "Renders with edge antialiasing" in info.plist. Thanks .

Please download the sample code in this drive link : https://drive.google.com/file/d/10f0QQqwhLuBidYGCDW4vUpEsH5uypWNb/view Please ignore unwanted code added in the class files. Thanks

Sure i will send you sample project

Thanks for your reply. This issue I am facing in device itself.  I am adding this UITextView on custom UIView(TextView) as subview. This main UIView(TextView) adding to one more UIView(MainCanvasView) as subview. This problem comes only when I apply scale transform to MainCanvasView. If MainCanvasView scale is 1.0 then it will works fine. Let me know if you need further details