Configure PDF view controllers on iOS
A PDFConfiguration defines the behavior of a PDFViewController. It uses the builder pattern from PDFConfigurationBuilder to create an immutable copy using a closure.
The following code demonstrates a typical use case:
let document = Document(url: documentURL)// The configuration building closure is passed to the `Document` initializer as a trailing closure.let controller = PDFViewController(document: document) { $0.thumbnailBarMode = .none $0.shouldShowUserInterfaceOnViewWillAppear = false $0.isPageLabelEnabled = false}PSPDFDocument *document = [[PSPDFDocument alloc] initWithURL:documentURL];PSPDFViewController *controller = [[PSPDFViewController alloc] initWithDocument:document configuration:[PSPDFConfiguration configurationWithBuilder:^(PSPDFConfigurationBuilder *builder) { builder.thumbnailBarMode = PSPDFThumbnailBarModeNone; builder.shouldShowUserInterfaceOnViewWillAppear = NO; builder.pageLabelEnabled = NO;}]];PDFViewController contains a shortcut to create and set a new PDFConfiguration object — updateConfiguration(builder:) — based on the current settings. After setting the new configuration object, the view controller will automatically invoke reloadData() to refresh its state.
Certain properties can be updated without a full state reload using updateConfigurationWithoutReloading(builder:). Be careful though, since Nutrient doesn’t warn you if you change a property that would require a state reload, as the view controller could get into an invalid state using this method.
Here’s an example:
controller.updateConfigurationWithoutReloading { $0.isTextSelectionEnabled = !isAutoplaying $0.isScrollOnEdgeTapEnabled = !isAutoplaying}[controller updateConfigurationWithoutReloadingWithBuilder:^(PSPDFConfigurationBuilder *builder) { builder.textSelectionEnabled = !self.isAutoplaying; builder.scrollOnEdgeTapEnabled = !self.isAutoplaying;}];