Cue

@objcMembers
@objc(BMPCue)
public class Cue : NSObject, NSCopying

Describes a subtitle cue.

  • The start time of the cue in seconds

    Declaration

    Swift

    public var startTime: TimeInterval

  • The end time of the cue in seconds

    Declaration

    Swift

    public var endTime: TimeInterval

  • The cue text as HTML

    Declaration

    Swift

    public var html: String?

  • The cue text

    Declaration

    Swift

    public var text: String?

  • The original raw text of the cue, as written in the caption file

    Limitations:

    • For in-manifest subtitle tracks, it will always have the same value as Cue.text.

    Declaration

    Swift

    public var rawText: String?

  • The formatted text content of the cue.

    This property provides the cue’s text content with attributes in the UIKitAttributes format, making it directly usable with UIKit and SwiftUI components that support attributed strings.

    The supported styles include:

    • Foreground color (text color)
    • Background color (of the character)
    • Underline style
    • Italic text style
    • Bold text style

    Limitation:

    1. Side-loaded subtitles: for side-loaded subtitles, only color attributes (foreground and background) are supported. Font-related attributes and underline styles are not available for these types of subtitles.
    2. One font-related attribute at a time: having multiple font-related attributes (italic and bold styles) on the same range is not supported. In this case, only one attribute will be applied.

    Usage Example:

    import SwiftUI

// Use in a SwiftUI `Text` view

guard let attributedText = cueEvent.attributedText else { return }
Text(AttributedString(attributedText))

    Compatibility:

    • UIKit: Directly use the NSAttributedString with UILabel, UITextView, or other UIKit components.
    • SwiftUI: Convert the NSAttributedString to AttributedString using SwiftUI’s built-in support with AttributedString(attributedText), as shown in the usage example above.

    Troubleshooting:

    • SwiftUI: If the formatting is not working, try scoping the attributes to keep during the conversion: swift try AttributedString(attributedText, including: \.uiKit)

    Declaration

    Swift

    public var attributedText: NSAttributedString?

  • The cue image

    Declaration

    Swift

    public var image: UIImage?

  • The position of the cue. Only relevant for CEA-captions, provides information about where the cue should be positioned on a grid of 15 character rows times 32 columns

    Declaration

    Swift

    public var position: CuePosition?

  • The region of the cue

    Declaration

    Swift

    public var region: String?

  • The region style of the cue

    Declaration

    Swift

    public var regionStyle: String?
  • vtt

    The VTT positioning properties for this cue

    Declaration

    Swift

    public var vtt: VttProperties?

  • Declaration

    Swift

    public init(
    startTime: TimeInterval,
    endTime: TimeInterval,
    html: String? = nil,
    text: String? = nil,
    rawText: String? = nil,
    attributedText: NSAttributedString? = nil,
    image: UIImage? = nil,
    position: CuePosition? = nil,
    region: String? = nil,
    regionStyle: String? = nil,
    vttProperties: VttProperties? = nil
)

    Parameters

    startTime

    The start time of the cue in seconds
    endTime

    The end time of the cue in seconds
    html

    The cue text as HTML
    text

    The cue text
    rawText

    The original raw text of the cue, as written in the caption file
    attributedText

    The formatted text content of the cue
    image

    The cue image
    position

    The position of the cue. Only relevant for CEA captions
    region

    The region of the cue
    regionStyle

    The region style of the cue
    vttProperties

    The VTT positioning properties for this cue

    Return Value

    A new subtitle cue