iPhone SDK - 如果按下硬件按钮，如何禁用音量指示器视图？ [英] iPhone SDK - How to disable the volume indicator view if the hardware buttons are pressed?
问题描述
有没有办法阻止音量指示器视图表单显示你是否按下音量增大/减小硬件按钮？
Is there a way to prevent the volume indicator view form showing if you press the volume up/down hardware buttons?
仅限演示应用程序需要它。因此该方法不需要App Store安全。
It's needed for a demo app only. So the method don't need to be App Store safe.
推荐答案
IIRC，MPVolumeView的存在会禁止显示音量指示符叠加。尝试坚持相关视图并查看是否是这种情况。
IIRC, the presence of a MPVolumeView inhibits the display of the volume indicator overlay. Try sticking it the relevant view and seeing if this is the case.
然后你可以尝试各种技巧使其有效隐形：
Then you can try various tricks to make it effectively invisible:
- 隐藏（或隐藏超级视图）。
- 将其alpha（或superview的alpha）设置为0，或者0.01左右。
- 将其移出屏幕
- 几乎将其移出屏幕（例如，屏幕上只有左上角的像素） ）
- 将其粘贴在另一个视图下。
- 将其粘贴在子视图中，其中clipsToBounds = ON，并将其移到这些边界之外
- 将volumeView.layer.mask设置为新的（因此完全透明的）CALayer。设置volumeView.userInteractionEnabled = NO。
- Make it hidden (or make a superview hidden).
- Set its alpha (or the alpha of a superview) to 0, or 0.01, or so.
- Move it off-screen
- Move it almost off-screen (e.g. so only the top-left pixel is on screen)
- Stick it under another view.
- Stick it in a subview with clipsToBounds=ON, and move it outside those bounds
- Set volumeView.layer.mask to a new (thus fully-transparent) CALayer. Set volumeView.userInteractionEnabled = NO.
MPVolumeView理论上可以检测到所有这些，但我怀疑它们中的一些会起作用。
All of these are theoretically detectable by MPVolumeView, but I suspect some of them will work.
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