AEPCaptionTrack
@interface AEPCaptionTrack : AEPCaptionBaseTrack字幕轨道
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                  逐字动画 part animation DeclarationObjective-C @property (nonatomic, copy, readonly) NSArray<AEPPartAction *> *partActions;
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                  气泡资源 DeclarationObjective-C @property (nonatomic, strong, readonly) AEPSource *source;
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                  描边颜色 DeclarationObjective-C @property (nonatomic, strong, readonly) UIColor *outlineColor
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                  字体样式 - see: AliyunCaptionStickerFaceType DeclarationObjective-C @property (nonatomic, readonly) AliyunCaptionStickerFaceType faceType;
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                  字幕缩放值,默认为1.0 DeclarationObjective-C @property (nonatomic, readonly) CGFloat scale;
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                  圆角大小, 默认等于0 API_AVAILABLE(3.31.0) DeclarationObjective-C @property (nonatomic, readonly) CGFloat cornerRadius;
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                  描边宽度,单位:像素 默认0 DeclarationObjective-C @property (nonatomic, readonly) CGFloat outlineWidth;
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                  阴影颜色,默认nil DeclarationObjective-C @property (nonatomic, strong, readonly) UIColor *shadowColor
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                  阴影的偏移值,默认 UIOffsetZero, x/y单位:像素,默认UIOffsetZero DeclarationObjective-C @property (nonatomic, readonly) int shadowOffset;
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                  花字效果文件夹路径 DeclarationObjective-C @property (nonatomic, strong, readonly) AEPSource *fontEffectSource;
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                  对齐方式 DeclarationObjective-C @property (nonatomic, readonly) AliyunCaptionStickerTextAlignment textAlignment;
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                  编辑器中使用的字幕控制器 DeclarationObjective-C @property (nonatomic, strong, readonly) AliyunCaptionStickerController *captionStickerController;
 AEPCaptionTrack Class Reference
        AEPCaptionTrack Class Reference