Redo and Undo Text Editing

The following code shows how to undo and redo a text editing:  

if ([pdfView canEditTextUndo]) {
    [pdfView editTextUndo];
}

if ([pdfView canEditTextRedo]) {
    [pdfView editTextRedo];
}

You can add listeners for undo and redo status. See the method PDFViewEditingOperationDidChanges: in How to Listen to the Changes of Block Editing part of Edit PDF in this guide.