objective-c - 如何为 iOS 中的按钮添加声音？

Question

我想在按下按钮时播放声音。此外，还有不止一种声音。我正在使用 Xcode 4.4.1 和 Storyboard。

在.h文件中

{
    IBOutlet UIButton *playSound;
}

Answer 1

我觉得写这个类型的例子会很有趣，所以我写了它。它演示了如何在按下按钮时播放不同的随机声音:

-(IBAction)buttonPressedWithSound:(id)sender {

    int randomSoundNumber = arc4random() % 4; //random number from 0 to 3

    NSLog(@"random sound number = %i", randomSoundNumber);

    NSString *effectTitle;

    switch (randomSoundNumber) {
        case 0:
            effectTitle = @"sound1";
            break;
        case 1:
            effectTitle = @"sound2";
            break;
        case 2:
            effectTitle = @"sound3";
            break;
        case 3:
            effectTitle = @"sound4";
            break;

        default:
            break;
    }

    SystemSoundID soundID;

    NSString *soundPath = [[NSBundle mainBundle] pathForResource:effectTitle ofType:@"caf"];
    NSURL *soundUrl = [NSURL fileURLWithPath:soundPath];

    AudioServicesCreateSystemSoundID ((CFURLRef)soundUrl, &soundID);
    AudioServicesPlaySystemSound(soundID);  
}

解释:

• 在您的项目中添加四种声音:sound1.caf、sound2.caf、sound3.caf 和 sound4 .caf.

• 将 AudioToolbox 框架导入您的项目。并包含在 .h #import <AudioToolbox/AudioToolbox.h> 中.

• 不要忘记通过 IBAction 将您的按钮连接到 buttonPressedWithSound .