AVPlayer - 向CMTime添加秒数

4 回答

• 2

  这是一种方式：

  CMTimeMakeWithSeconds(CMTimeGetSeconds(music.currentTime) + 5, music.currentTime.timescale);
  

  回复于 2024-04-30T21:27:14+08:00
• 19

  优雅的方式是使用 CMTimeAdd

  CMTime currentTime = music.currentTime;
  CMTime timeToAdd   = CMTimeMakeWithSeconds(5,1);
  
  CMTime resultTime  = CMTimeAdd(currentTime,timeToAdd);
  
  //then hopefully 
  [music seekToTime:resultTime];
  

  编辑：你可以通过这些方式创建CMTime结构

  CMTimeMake
  CMTimeMakeFromDictionary
  CMTimeMakeWithEpoch
  CMTimeMakeWithSeconds
  

  更多@：https://developer.apple.com/library/mac/#documentation/CoreMedia/Reference/CMTime/Reference/reference.html

  回复于 2024-04-30T21:27:14+08:00
• 24

  在Swift中：

  private extension CMTime {
  
      func timeWithOffset(offset: NSTimeInterval) -> CMTime {
  
          let seconds = CMTimeGetSeconds(self)
          let secondsWithOffset = seconds + offset
  
          return CMTimeMakeWithSeconds(secondsWithOffset, timescale)
  
      }
  
  }
  

  回复于 2024-04-30T21:27:14+08:00
• 0

  Swift 4，使用自定义运算符：

  extension CMTime {
      static func + (lhs: CMTime, rhs: TimeInterval) -> CMTime {
          return CMTime(seconds: lhs.seconds + rhs,
                        preferredTimescale: lhs.timescale)
      }
  
      static func += (lhs: inout CMTime, rhs: TimeInterval) {
          lhs = CMTime(seconds: lhs.seconds + rhs,
                        preferredTimescale: lhs.timescale)
      }
  
  }
  

  回复于 2024-04-30T21:27:14+08:00