Display Modes

ComPDF supports single-page, double-page, and book mode arrangements for documents, facilitating reading through both page flipping and scrolling methods. Additionally, it offers options to set cropping mode.

Set the Display Mode

This example shows how to set the display mode to single continuous:

swift

var pdfview = CPDFView()
pdfview.displayTwoUp = false
pdfview.displaysAsBook = false
pdfview.layoutDocumentView()

objective-c

CPDFView pdfview;
pdfview.displayTwoUp = NO;
pdfview.displaysAsBook = NO;
[pdfview layoutDocumentView];

Explanation of Display Mode Types

The table below displays Reading Mode types, descriptions, and their corresponding parameter names.

Type	Description	Parameter Name
Page continuous	Set whether to add spacing between adjacent pages.	pdfview.isContinueMode
Double	Set whether to display two pages of the document side by side.	pdfview.displayTwoUp
Book	Set whether to have the cover occupy a separate line in double-page mode.	pdfview.displaysAsBook
Scrolling Direction	Set whether to use vertical scrolling or horizontal scrolling.	pdfView.displayDirection

Set the Crop Mode

Crop mode refers to a feature in PDF documents that allows the cropping of pages to alter their visible area or dimensions. Crop mode enables users to define the display range of a page, making it visually more aligned with specific requirements.

This example shows how to set the crop mode:

swift

var pdfview = CPDFView()
pdfview.displayCrop = true
pdfview.layoutDocumentView()

objective-c

CPDFView pdfview;
pdfview.displayCrop = YES;
[pdfview layoutDocumentView];