PDF File Editing Tool for iPhone

We need a PDF file editing tool similar to apple PDF editor for their mail app. Features that we need are: 1) Need a main function to open PDF file in this project. Functions will be like: func openPDFFile(fileName: String, fileURL: URL) a) After file importing from other apps user will use this method to open the PDF file. b) OR User can open existing PDF files that are stored in userDocuments 2) Editing screen buttons and their purposes: There should be two main panels: Top and bottom panels. b) Top panel contains four buttons: i) Cancel button -> Discard all changes and document will stay as its open. ii) Done button -> Save all changes and changes will be editable when the PDF file open again. After done, if user exports the PDF file to other apps then changes need to be visible in other apps as well. iii) Undo button -> Undo any changes. iv) Redo button -> Redo anything undone. c) Bottom panel contains three main buttons: i) Draw button -> When tapped, further panel opens with choices of two drawing settings: One is for the color of the drawing line and the second is for the width of the drawing line. * Drawing is draggable on screen and resizable, meaning that the user can increase or decrease the drawing size proportionally by its width and height. Drawing can be deleted and duplicated, when the user taps on the drawing menu. On tapping, two options will appear: Delete and Duplicate. ii) Text button -> When tapped, further panel opens with the choice of two text settings: One is for the color of the text and the second is for the size of the text (smaller or larger). * Text is draggable on the screen and resizable, meaning that the user can increase or decrease its width or height. * Text can be deleted, edited or duplicated, when the user taps on the text menu. Three options will be appear: Delete, Edit and Duplicate. * When tapped on Edit, Text will be editable and when the user taps on keypad’s return key, a new line will be added in text box. When the user taps on keypad’s delete button, a line will be removed from the text box. iii) Signature button -> When tapped, further UIAlertSheet opens to choose existing signature OR add/edit signature screen appears in which: * User can delete existing signature or add new signature; these should be visible in the signature screen. - When user taps on delete button on the signature on signature screen, it will remove the signature. - When user taps on add button on signature screen, it will open another screen to draw a new signature. New signature screen layout is attached with this project. * Signature is draggable on the screen and resizable, meaning that the user can increase or decrease the signature proportionally by its width and height. * Signature can be deleted or duplicated, when the user taps on signature menu. Two options will appear: Delete and Duplicate. Our requirements for this project are: 1) Organize code with maximum creating methods with parameters. 2) All codes will be in Swift latest version. No POD installation or Objective-C codes. 3) We need all codes with readable functions/methods with comments describing the purpose of the code. 2) We can ask you to simplify your code if we needed. 3) Please bid, only individuals. We will not award this project to team based companies. Code Copyright Condition: After the full payment we will be the copyright owner of all codes. So in future you will not be able to claim your ownership on the delivered codes. Payment Condition: One full payment milestone will be created which will be released on the completion of the project. We will not give you any portion of the payment before completion of the project. So please don't ask us to release you partial payments in the middle of the project or start of the project. Required Project Features Video: Please watch attached video to understand the required features concept.