Question

Objective-C的新手和Xcode中的编程我无法理解为什么我的声音没有播放。我遵循了这个教程（http://www.youtube.com/watch?v=2mbCkIVF1-0）但由于某种原因我无法在iOS模拟器中播放我的声音。我使用的是故事板布局而不是nib文件，所以这可能是问题所在？我知道如何将我的按钮连接到我所拥有的故事板上，所以我很困惑，这个问题让我发疯。非常感谢任何帮助，如果我的代码错了，请指出我正确的方向，问题可能是微不足道的，无论哪种方式任何帮助都会很棒！再次感谢

SFViewController.m

#import <UIKit/UIKit.h>
#import <AVFoundation/AVAudioPlayer.h>


@interface SFViewController : UIViewController <AVAudioPlayerDelegate> {

}
-(IBAction)playSound1;
-(IBAction)playSound2;
-(IBAction)playSound3;

@end

SFViewController.h

#import "SFViewController.h"
#import <AVFoundation/AVAudioPlayer.h>


@implementation SFViewController



-(IBAction)playSound1 {

    NSString *path = [[NSBundle mainBundle] pathForResource:@"SeriouslyFunnySound1" ofType:@"wav"];
    AVAudioPlayer* theAudio = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path]error:NULL];

    theAudio.delegate = self;
    [theAudio play];
}

-(IBAction)playSound2 {

    NSString *path = [[NSBundle mainBundle] pathForResource:@"SeriouslyFunnySound2" ofType:@"wav"];
    AVAudioPlayer* theAudio = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path]error:NULL];

    theAudio.delegate = self;
    [theAudio play];
}

-(IBAction)playSound3 {

    NSString *path = [[NSBundle mainBundle] pathForResource:@"SeriouslyFunnySound3" ofType:@"wav"];
    AVAudioPlayer* theAudio = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path]error:NULL];

    theAudio.delegate = self;
    [theAudio play];
}

Answer 1

当你的“theAudio”变量超出范围时会丢失，所以玩家会停止。将变量保留为类的成员：

@implementation SFViewController
{
    AVAudioPlayer* theAudio;
}

-(IBAction)playSound1 {

    NSString *path = [[NSBundle mainBundle] pathForResource:@"SeriouslyFunnySound1" ofType:@"wav"];
    theAudio = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path]error:NULL];

    theAudio.delegate = self;
    [theAudio play];
}

Answer 2

为什么要将NULL传递给AVAudioPlayer次？传入一个指向NSError的nil指针并确保在启动后错误仍为零。我最好的猜测是有一些错误，而theAudio实际上是零。

Answer 3

首先确保你的IBAction方法实际被调用（在这些方法中放置一个NSLog语句，看看它们是否被调用..如果它们不是......我相信你可以自己搞清楚）< / p>

第二步：创建一个NSError对象并传入它的地址以查看问题的本质，如下所示：

 NSError *err= nil
 NSString *path = [[NSBundle mainBundle] pathForResource:@"SeriouslyFunnySound1" 
                                                  ofType:@"wav"];
 AVAudioPlayer* theAudio = 
      [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path]
                                             error:err];
 if (!theAudio) {
     NSLog(@"failed playing SeriouslyFunnySound1, error: %@", error);
 }

 theAudio.delegate = self;
 [theAudio play];

错误的内容应该告诉你下一步该怎么做

Answer 4

遇到同样的问题。以下是Swift的答案：

class ViewController: UIViewController {

    var soundPlayer: AVAudioPlayer!

    @IBAction func newPomodoButtonTaped(sender: UIButton) {
       let soundPath = NSBundle.mainBundle().pathForResource("click_done", ofType: "wav")!
      do {
            soundPlayer = try AVAudioPlayer(contentsOfURL: NSURL(string: soundPath)!)
            soundPlayer.prepareToPlay()
            soundPlayer.numberOfLoops = 0
            soundPlayer.play()
        } catch let error as NSError {
            print(error)
        }
    }
}

声音没有在iOS模拟器中播放AVAudioPlayer

4 个答案: