UI and view settings
Common UI and view settings in Foxit PDF SDK for iOS: page layout, night mode, crop mode, page binding direction, localization, and more.
Page layout mode
Set layout with setPageLayoutMode: on FSPDFViewCtrl:
| Constant | Description |
|---|---|
PDF_LAYOUT_MODE_SINGLE | Single page |
PDF_LAYOUT_MODE_TWO | Two pages |
PDF_LAYOUT_MODE_REFLOW | Reflow |
PDF_LAYOUT_MODE_TWO_LEFT | Two pages (cover on left) |
PDF_LAYOUT_MODE_TWO_RIGHT | Two pages (cover on right) |
PDF_LAYOUT_MODE_TWO_MIDDLE | Two pages (cover centered) |
objc
[pdfViewCtrl setPageLayoutMode:PDF_LAYOUT_MODE_SINGLE];
// Continuous scrolling
[pdfViewCtrl setContinuous:YES];
BOOL isContinuous = [pdfViewCtrl isContinuous];Night mode
objc
// Enable night mode
pdfViewCtrl.isNightMode = YES;
// Or use color mapping for custom foreground/background
pdfViewCtrl.colorMode = FSRendererColorModeMapping;
pdfViewCtrl.mappingModeBackgroundColor = [UIColor blackColor];
pdfViewCtrl.mappingModeForegroundColor = [UIColor whiteColor];Zoom
objc
// Get/set zoom level
float zoom = [pdfViewCtrl getZoom];
[pdfViewCtrl setZoom:2.0f];
// Zoom mode
[pdfViewCtrl setZoomMode:PDF_DISPLAY_ZOOMMODE_FITWIDTH];Crop mode
objc
// Crop to content bounds
[pdfViewCtrl setCropMode:PDF_CROP_MODE_CONTENTSBOX];
// Custom crop region
[pdfViewCtrl setCropPageRect:0 pdfRect:customRect];
[pdfViewCtrl setCropMode:PDF_CROP_MODE_CUSTOMIZED];
// Exit crop mode
[pdfViewCtrl setCropMode:PDF_CROP_MODE_NONE];Page binding direction
Controls page pairing in two-page layout for right-to-left documents:
objc
// Right to left
pdfViewCtrl.pageBindingEdge = PDF_PAGE_BINDING_RIGHT_EDGE;
// Left to right (default)
pdfViewCtrl.pageBindingEdge = PDF_PAGE_BINDING_LEFT_EDGE;Localization
The SDK switches UI language via FSLocalization:
objc
#import <FoxitRDK/FSLocalization.h>
// Current language
NSString *lang = [FSLocalization getCurrentLanguage];
// Simplified Chinese
[FSLocalization setCurrentLanguage:@"zh-Hans"];Page spacing
objc
// Spacing in two-page mode
[pdfViewCtrl setPageSpacing:5];
// Horizontal and vertical spacing separately
[pdfViewCtrl setPageSpacing:2 direction:FS_PAGESPACING_HORIZONTAL];
[pdfViewCtrl setPageSpacing:4 direction:FS_PAGESPACING_VERTICAL];API reference
See the API reference for FSPDFViewCtrl and FSLocalization.