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我使用libpd创建了一个音乐应用程序,它有两种控制波形音量和音调的方式 - 两个独立的UISliders和一个使用UIPanGestureRecognizer的XY平板。将UIPanGestureRecognizer链接到UISlider?
我想要做的是让滑块反映出XY垫的动作,所以想知道这是怎么可能的? (即,Y轴已经在控制音量,但看到滑块也对其作出反应)
这就是我用单独的控件所处的位置。
// Volume slider
-(IBAction)sineVol:(id)sender
{
UISlider *vslider = (UISlider *)sender;
[PdBase sendFloat:vslider.value toReceiver:@"sine_vol"];
}
// Pitch slider
-(IBAction)sinePitch:(id)sender
{
UISlider *pslider = (UISlider *)sender;
[PdBase sendFloat:pslider.value toReceiver:@"sine_pitch"];
}
// XY Pad
-(IBAction)sineXYPad:(UIPanGestureRecognizer *)trigger
{
float sinepadHeight = sinexyview.bounds.size.height;
float sinepadWidth = sinexyview.bounds.size.width;
CGPoint location = [trigger locationInView:sinexyview];
if ((location.y >= 0) && (location.y < sinepadHeight) && (location.x >= 0) && (location.x < sinepadWidth))
{
float sineVolXY = ((location.y)/250);
[PdBase sendFloat:sineVolXY toReceiver:@"sine_vol"];
}
if ((location.y >= 0) && (location.y < sinepadHeight) && (location.x >= 0) && (location.x < sinepadWidth))
{
float sinePitchXY = ((location.x)/5);
[PdBase sendFloat:sinePitchXY toReceiver:@"sine_pitch"];
}
}