iPhone：使用按钮实现音量控制
谁能告诉我如何实现单击按钮时调节音量的功能？基本上我试图放置两个按钮“音量调高”和“音量调低”，但我找不到调整按钮单击音量的方法。 此链接提到了 MPVolumeView，但我在 XCode 中找不到它4.0 对象列表，而且我不确定是否可以将其用于按钮单击音量调整。有人可以指出我正确的方向吗？
Could anyone please tell me how could I implement the functionality of adjusting the volume on button click? Basically I am trying to put two buttons Volume Up and Volume Down but I couldn't find anyway to adjust the volume of button click. This link mentions about the MPVolumeView but I can't find it in my XCode 4.0 objects list and also I am not sure if I can use that for button click volume adjust. Could someone please point me in correct direction.
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如果我理解正确的话，您希望有按钮来告诉 iPhone 调高或调低音量。尽管使用 UIProgressView 实现这一点可能会更幸运
我会尝试使用类似的东西，要么使用每个由所选按钮定义的多个预期音量，要么创建一个变量并在 ibaction ex myAudio.volume = x+.5; 中添加或减去它。
...
myAudio.volume = 1.0;
}
If I'm understanding you correctly, your looking to have buttons to tell the iPhone to adjust the volume up or down. Although you may have better luck achieving this with a UIProgressView
I would try playing around with something like this, either with multiple intended volumes each defined by the selected button, or create a variable and add or subtract from it in the ibaction ex myAudio.volume = x+.5;
...
myAudio.volume = 1.0;
}