我有一个使用选择器视图的多个声音的音乐播放器。我的问题是,当我点击下一首音乐时,前一首音乐将与我选择的音乐重叠。当我滚动拾音器视图选择一个新对象时,它将播放一个新的音乐/声音,但前一个对象将重叠目前的选择。我想停止以前的音乐,以免它重叠。这是代码。
H档案:
#import <UIKit/UIKit.h>
#import <AVFoundation/AVAudioPlayer.h>
@interface PickerViewController : UIViewController <UIPickerViewDelegate, UIPickerViewDataSource, AVAudioPlayerDelegate>{
UIPickerView *picker;
UILabel *musicTitle;
NSMutableArray *musicList;
AVAudioPlayer *audioPlayer;
}
@property (nonatomic, retain) IBOutlet UIPickerView *picker;
@property (nonatomic, retain) IBOutlet UILabel *musicTitle;
@property (nonatomic, retain) NSMutableArray *musicList;
-(IBAction)playSelectedMusic:(id)sender;
@end
M档案:
- (void)viewDidLoad
{
[super viewDidLoad];
musicList = [[NSMutableArray alloc] initWithObjects:@"m1",@"m2",@"m3",@"m6",@"m4", @"m5",nil];
}
-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
if ([[musicList objectAtIndex:row] isEqual:@"m1"])
{
NSString *path = [[NSBundle mainBundle] pathForResource:@"m1" ofType:@"mp3"];
AVAudioPlayer* theAudio=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
pickerView.delegate = self;
[theAudio play];
[theAudio setCurrentTime:0.0]; (our friend from this forum have suggested this but still doens't work)
NSString *resultString = [[NSString alloc] initWithFormat:
@"m1",
[musicList objectAtIndex:row]];
musicTitle.text = resultString;
}
if ([[musicList objectAtIndex:row] isEqual:@"m2"])
{
NSString *path = [[NSBundle mainBundle] pathForResource:@"m2" ofType:@"mp3"];
AVAudioPlayer* theAudio=[[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path] error:NULL];
pickerView.delegate = self;
[theAudio play];
[theAudio setCurrentTime:0.0]; (our friend from this forum have suggested this but still doens't work)
NSString *resultString = [[NSString alloc] initWithFormat:
@"m2",
[musicList objectAtIndex:row]];
musicTitle.text = resultString;
}
代码修正:
NSString *path = [[NSBundle mainBundle] pathForResource:@"you" ofType:@"mp3"];
NSURL *file = [[NSURL alloc] initFileURLWithPath:path];
AVAudioPlayer* theAudio=[[AVAudioPlayer alloc] initWithContentsOfURL:file error:NULL];
[file release];
self.audioPlayer = theAudio;
[theAudio release];
[audioPlayer prepareToPlay];
[audioPlayer setDelegate:self];
[audioPlayer setNumberOfLoops:0];
[audioPlayer stop];
我的愚蠢错误:
@property (nonatomic, retain) AVAudioPlayer *audioPlayer;
答案 0 :(得分:1)
在启动另一个声音之前,只需停止当前正在播放的声音,AVAudioPlayer就是一个ivar,这样你就可以做到。添加
[theAudio stop];