如何从 NSArray 获取 Soundfilenames 并播放？

Posted 2023-02-25

【中文标题】如何从 NSArray 获取 Soundfilenames 并播放？

【英文标题】：How to get Soundfilenames from an NSArray and play?

【发布时间】：2010-08-07 21:11:22

【问题描述】：

我想通过触摸相应的 UImageView 来播放多个音频文件 (*.wav)。每次触摸 UIImageView 都会更改一个“触发器编号”——选择哪个视图。音频文件名称存储在一个数组中。但是我不知道如何编写一个方法来获取名称并播放正确的声音，而不使用带有冗余 coden-ps 的 select case 方法来播放声音：

#pragma mark -

-(void)touchesBegan:(NSSet*)touches withEvent:(UIEvent*)event

//Soundfile names in array arrAnimalde
arrAnimalde = [NSArray arrayWithObjects:@"Hund" ,@"Schwein" ,@"Ferkel", nil];

// here are some Views and their triggers
if([touch view] == img_hund)
    trigAnimal = 0;
    

if([touch view] == img_schwein)
    trigAnimal = 1;
    

if([touch view] == img_ferkel)
    trigAnimal = 2;
      

        /* here I'd like to have a method to send the triggernumber and get the 
soundnameposition in the array to play the appropriate sound e. g. "Hund.wav" which is the first entry
 in the array : I tried something with "self.langKeys objectAtIndex:arrAnimalde" instead of the string in the following code but it 
does'nt work
*/

        //Sound
    AudioservicesCreateSystemSoundID ((CFURLRef)[NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource: @"**here please the right name from the array**" ofType: @"wav"]], &soundFileObject);
    AudioServicesPlaySystemSound (self.soundFileObject);
    

或者这是一个完全错误的解决方法？

相关的第二个问题是：如何将三个“if([touch view] == img...”代码放在更短的（select-case？）语句中？

【参考方案1】：

试试这个...

   [arrAnimalde objectAtIndex: trigAnimal]

例如

 AudioServicesCreateSystemSoundID ((CFURLRef)[NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource: [arrAnimalde objectAtIndex: trigAnimal] ofType: @"wav"]], &soundFileObject);

【讨论】：

没问题，但可能想检查一下是否已回答。