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iOS

Troubleshooting

guides

Introduction
Upgrade
Viewer
- Overview
- visionOS
- Page Transition
- Page Navigation
- Viewing Options
  
  Reader View
  
  Night Appearance
  
  Right-to-Left
  
  Multiple Windows
- Touch And Input
  
  User interactions
  
  Text selection
  
  Keyboard Shortcuts
  
  Trackpad and Mouse
  
  Zooming
  
  Drag and Drop
- Embedded Files
- View State
- Accessibility
  
  Features
  
  Text-to-Speech
- Rendering
  
  PDF Pages
  
  PDF Forms
  
  Coordinate Space
  
  Annotations
  
  Fonts
- Images and Photos
- PDF JavaScript Support
- Permissions
- Troubleshooting
Open a document
Save A Document
User Interface
- Overview
- Main Toolbar
- Annotations
  
  Toolbar
  
  Inspector
  
  Color Picker
  
  Annotations List
- Document Editor
- Signatures
- Menus
- Appearance Styling
- Buttons
  
  Styling
  
  Icons
  
  Close Button
- Pdf View Controller
  
  View Hierarchy
  
  Embedding
  
  Controller States
  
  Configuration
- Overriding Classes
- Localization
AI Assistant
- Integrate viewer with AI Assistant
- Use multiple documents
Annotations
- Overview
- Introduction to annotations
  
  What are annotations?
  
  Annotation types
  
  Data formats
- Synchronization
  
  Overview
  
  Storing annotation data
  
  Conflict resolution
- Save
  
  Overview
  
  Embed into a PDF
  
  To external storage
  
  Automatically saving
- Import and export
  
  XFDF
  
  Instant JSON
  
  Document Engine
  
  Database
- Create, edit, and remove
  
  Annotation object model
  
  Programmatic
  
  Detect changes
  
  State manager
  
  Attach a file
  
  Image picker
  
  Disable editing
  
  Annotation flags
  
  Drag and drop
  
  Undo and redo
  
  Author name
  
  Blend modes
  
  Z-index
- Customization
  
  Appearance streams
  
  Hiding annotations
  
  Default properties
  
  Color presets
  
  Note icon
  
  Fixed size
  
  Store custom data
- Replies and reviews
- Stamp a document
  
  Stamp configuration
  
  Custom stamps
- Flatten
- Rich media
  
  Video annotations
  
  Multimedia annotations
- Annotate on images
  
  Create, edit, and remove
  
  Specification
- PDF actions
  
  PDF actions support
  
  Link annotations
- Freeform rotation
- Apple Pencil
  
  Customization
  
  Double tap
- Magic Ink
Forms
- Overview
- Introduction to forms
  
  What are forms?
  
  Form fields
  
  Data formats
- Fill form fields
  
  Programmatic
  
  Using the UI
  
  Attach a file
  
  Image picker
  
  Undo and redo
  
  Detect user input
- Extract form data
- Submit or save
  
  To an external destination
  
  To a custom destination
  
  To Document Engine
  
  Embed data into a PDF
- Create, edit, and remove
  
  Form object model
  
  Create fillable form
  
  Add signature field
  
  Edit fields
  
  Disable editing
  
  Form field flags
- Flatten
- PDF actions support
- JavaScript validation
Instant synchronization
- Overview
- Get started
- Authentication
- Usage
- Annotation sync
- Instant layers
- Comments
- Permissions
  
  Overview
  
  Content ownership
  
  Set permissions
  
  Edit permissions
- Offline support
- Document state
- Data protection
Signatures
- Overview
- Introduction to Signatures
- Electronic Signatures
  
  Add an eSignature
  
  Signature Storage
  
  Sign with a Certificate
- Digital Signatures
  
  Signature Standards
  
  Supported Methods
  
  Generate Certificate
  
  Add a Digital Signature
  
  Validation
  
  Biometric
  
  Customization
  
  Custom Signers
  
  Contained Signatures
  
  Built-In UI
  
  Troubleshooting
- Add a Signature Field
- Fill and Sign Forms
Editor
- Overview
- Merge or combine
- Page manipulation
  
  Rotate
  
  Crop
  
  Move or copy
  
  Remove
  
  Scale or resize
- Add a page
- Attach a file
- Edit text
- Watermark
- Split
- Add an image
- Metadata
  
  Document title
  
  Document information
  
  PDF metadata
- Document permissions
- API usage
- Built-in UI
  
  Toolbar
  
  Thumbnail view
PDF generation
Conversion
Extraction
Redaction
OCR
Document security
Search
- Overview
- Search In A Pdf
  
  Text Search
  
  Annotation Search
- Indexed Full-Text Search
  
  Indexing Documents
  
  Matching Options
  
  Generate Search Previews
  
  Encrypt the Database
  
  Custom Tokenizers
  
  Custom SQLite Library
  
  Spotlight Indexing
Compare documents
Measurements
- Overview
- Distance
- Area
- Configure
Bookmarks
Events and notifications
Instant JSON
- Overview
- How it works
- Annotation schema
  
  Annotations
  
  File attachments
  
  Form field values
  
  Form field types
  
  Bookmarks
  
  Actions
  
  Comments
- Convert to XFDF
Best practices
Troubleshooting
Knowledge base

Prebuilt Solutions

Example Projects
Common Use Cases
Code Samples

About

System compatibility
File type support
Framework support
Licensing

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Troubleshooting

Troubleshooting

Troubleshoot common issues you might encounter when setting up the document viewer:

Font rendering

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