这是我在 viewDidLoad 中的代码：
AVPlayerItem* playerItem = [AVPlayerItem playerItemWithURL:[NSURL URLWithString:@"http://groove.wavestreamer.com:7321/listen.pls?sid=1"]];
[playerItem addObserver:self forKeyPath:@"timedMetadata" options:NSKeyValueObservingOptionNew context:nil];
music = [[AVPlayer playerWithPlayerItem:playerItem] retain];
[music play];
我的问题：
如何创建一个按钮，按下该按钮时可以快进/快退流 5 秒？
谢谢您的回答... ：）
编辑：我怎样才能添加到我当前的时间......
CMTime currentTime = music.currentTime;
...5秒？
In Swift,
fileprivate let seekDuration: Float64 = 5
@IBAction func doForwardJump(_ sender: Any) {
guard let duration = player.currentItem?.duration else{
return
}
let playerCurrentTime = CMTimeGetSeconds(player.currentTime())
let newTime = playerCurrentTime + seekDuration
if newTime < CMTimeGetSeconds(duration) {
let time2: CMTime = CMTimeMake(Int64(newTime * 1000 as Float64), 1000)
player.seek(to: time2)
}
}
@IBAction func doBackwardJump(_ sender: Any) {
let playerCurrentTime = CMTimeGetSeconds(player.currentTime())
var newTime = playerCurrentTime - seekDuration
if newTime < 0 {
newTime = 0
}
let time2: CMTime = CMTimeMake(Int64(newTime * 1000 as Float64), 1000)
player.seek(to: time2)
}
在 Objective-C 中，
#define seekDuration (float)5
- (IBAction)backwardButtonAction:(UIButton *)sender {
float playerCurrentTime = [self getCurrentTime];
float newTime = playerCurrentTime - seekDuration;
if (newTime < 0) {
newTime = 0;
}
CMTime time = CMTimeMake(newTime*1000, 1000);
[self.player seekToTime:time completionHandler:^(BOOL finished) {
dispatch_async(dispatch_get_main_queue(), ^{
playerSliderisScrubbing = NO;
});
}];
}
- (IBAction)forwardButtonAction:(UIButton *)sender {
float duration = [self getPlayerDuration];
float playerCurrentTime = [self getCurrentTime];
float newTime = playerCurrentTime + seekDuration;
if (newTime < duration) {
CMTime time = CMTimeMake(newTime*1000, 1000);
[self.player seekToTime:time completionHandler:^(BOOL finished) {
dispatch_async(dispatch_get_main_queue(), ^{
playerSliderisScrubbing = NO;
});
}];
}
}
- (float)getCurrentTime {
float seconds = 0;
if (_player) {
seconds = CMTimeGetSeconds([_player currentTime]);
}
return seconds;
}
- (float)getPlayerDuration {
float seconds = 0;
if (_player) {
seconds = CMTimeGetSeconds([[_player currentItem] duration]);
}
return seconds;
}
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