AliVttSubtitleConst Class Reference

Global constant configuration class for subtitle rendering. More...

#include "AliVttSubtitleView.h"

Inheritance diagram for AliVttSubtitleConst:

Properties
CGFloat	defaultExtraHeightFactor
	Extra height coefficient for complex characters.
NSInteger	defaultFontColor
	Default font color.
NSString *	defaultFontName
	Default font name.
NSInteger	defaultFontSize
	Default font size.
NSInteger	defaultLineCount
	Default maximum number of display lines.
CGFloat	defaultLineHeightVH
	Default line height ratio to video height.
CGFloat	defaultMaxShowingWidthFactor
	Maximum subtitle width ratio to video width.
CGFloat	defaultWidthPaddingSize
	Text padding size.
NSString *	pseudoClassBold
	Bold pseudo-class identifier.
NSString *	pseudoClassItalic
	Italic pseudo-class identifier.

Detailed Description

Global constant configuration class for subtitle rendering.

Provides default configuration parameters for subtitle rendering with support for custom extensions. Clients can inherit this class and override corresponding methods to customize subtitle display effects Supports various style attributes of the WebVTT standard.

Property Documentation

defaultExtraHeightFactor

- (CGFloat) defaultExtraHeightFactor

readnonatomicassign

Extra height coefficient for complex characters.

Returns

Height coefficient, default value is 0.3 (30%)

Note

Used for displaying complex characters like Thai and Chinese, preventing superscripts and subscripts from being truncated

defaultFontColor

- (NSInteger) defaultFontColor

readnonatomicassign

Default font color.

Returns

Color value in ARGB format, default is 0xFFFFFFFF (white)

defaultFontName

- (NSString*) defaultFontName

readnonatomicassign

Default font name.

Returns

Font name, default is "Arial"

Note

Used as default when no font is specified in CSS styles

defaultFontSize

- (NSInteger) defaultFontSize

readnonatomicassign

Default font size.

Returns

Font size in pixels, default value is 20

Note

This value affects the basic display size of subtitle text

defaultLineCount

- (NSInteger) defaultLineCount

readnonatomicassign

Default maximum number of display lines.

Returns

Maximum number of lines, default value is 18

Note

Prevents subtitle content from overflowing the display area

defaultLineHeightVH

- (CGFloat) defaultLineHeightVH

readnonatomicassign

Default line height ratio to video height.

Returns

Line height ratio, default value is 0.0533 (approximately 5.33%)

Note

Used for calculating subtitle line spacing and vertical layout

defaultMaxShowingWidthFactor

- (CGFloat) defaultMaxShowingWidthFactor

readnonatomicassign

Maximum subtitle width ratio to video width.

Returns

Width ratio, default value is 0.7 (70%)

Note

Used to control subtitle text wrapping and horizontal layout constraints

defaultWidthPaddingSize

- (CGFloat) defaultWidthPaddingSize

readnonatomicassign

Text padding size.

Returns

Padding in pixels, default value is 2.0

Note

Prevents text from being truncated at boundaries

pseudoClassBold

- (NSString*) pseudoClassBold

readnonatomicassign

Bold pseudo-class identifier.

Returns

Pseudo-class string, default is "b"

Note

Used for bold markup in WebVTT style parsing

pseudoClassItalic

- (NSString*) pseudoClassItalic

readnonatomicassign

Italic pseudo-class identifier.

Returns

Pseudo-class string, default is "i"

Note

Used for italic markup in WebVTT style parsing

---

The documentation for this class was generated from the following file:

• AliVttSubtitleView.h