TuSDKMediaMutableComposition Class Reference Inherits from NSObject Conforms to TuSDKMediaComposition Declared in TuSDKMediaMutableComposition.h Overview 支持多个 Composition 组合使用 compositions 已添加的 Composition 合成项集合 @property (nonatomic, readonly) NSArray<id<TuSDKMediaComposition> > *compositions Availability v3.4.1 Declared In TuSDKMediaMutableComposition.h – prepareForReading 准备读取数据 - (void)prepareForReading Availability v3.4.1 Declared In TuSDKMediaMutableComposition.h – appendComposition: 追加一个新的 Composition 合成项 - (BOOL)appendComposition:(id<TuSDKMediaComposition>)composition Parameters composition 合成项 Availability v3.4.1 Declared In TuSDKMediaMutableComposition.h – removeComposition: 移除指定的 Composition 合成项 - (BOOL)removeComposition:(id<TuSDKMediaComposition>)composition Parameters composition 合成项 Availability v3.4.1 Declared In TuSDKMediaMutableComposition.h