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无限互联3G学院.iOS开发视频教程.UI：6.4.UITabBarController基本用法2.mov种子下载地址：
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麻烦选为满意答案，谢谢！
[img]iOS开发视频教程 UI：4.11 UIImageView用法.mov种子下载地址：
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iOS开发视频教程 UI：7.模拟器常用操作种子下载地址：
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iOS开发视频教程 UI：3.3 视图控制器视图的装载.mov种子下载地址：
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核实后记得采纳！！
无限互联iOS开发视频教程 UI：2.4 UIView的基本属性和自定义.mov种子下载地址：
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这有一个例子：
iPhone – Add an UISlider For AVAudioPlayer
We can use AVAudioPlayer to play music. Now i want to add an UISlider as the music progress bar and user can fast skip the music.
Now i have a play button in the view and when user click it, i will play the music file as well as the following method.
* playButtonClicked – Run when the play button is clicked
* updateSlider – Run in 1 second interval to update the UISlider
* sliderChange – Fast skip the music when user scroll the UISlider
Here comes the code - (IBAction)playButtonClicked:(id)sender {
// Read the file from resource folder and set it in the avAudioPlayer
NSURL *fileUrl = [[NSURL alloc] initFileURLWithPath:[[NSBundle mainBundle] pathForResource:@"musicFile" ofType:@"caf"]];
avAudioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:fileUrl error:nil];
[avAudioPlayer setDelegate:self];
[avAudioPlayer setVolume:1.0];
// Set a timer which keep getting the current music time and update the UISlider in 1 sec interval
sliderTimer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(updateSlider) userInfo:nil repeats:YES];
// Set the maximum value of the UISlider
aSlider.maximumValue = avAudioplayer.duration;
// Set the valueChanged target
[aSlider addTarget:self action:@selector(sliderChanged:) forControlEvents:UIControlEventValueChanged];
// Play the audio
[avAudioPlayer prepareToPlay];
[avAudioPlayer play];
}
- (void)updateSlider {
// Update the slider about the music time
aSlider.value = avAudioPlayer.currentTime;
}
- (IBAction)sliderChanged:(UISlider *)sender {
// Fast skip the music when user scroll the UISlider
[avAudioPlayer stop];
[avAudioPlayer setCurrentTime:aSlider.value];
[avAudioPlayer prepareToPlay];
[avAudioPlayer play];
}
// Stop the timer when the music is finished (Need to implement the AVAudioPlayerDelegate in the Controller header)
- (void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag {
// Music completed
if (flag) {
[sliderTimer invalidate];
}
}
复制代码