How can I control UISlider Value Changed-events frequncy?
- by Albert
I'm writing an iPhone app that is using two uisliders to control values that are sent using coreBluetooth. If I move the sliders quickly one value freezes at the receiver, presumably because the Value Changed events trigger so often that the write-commands stack up and eventually get thrown away. How can I make sure the events don't trigger too often?
Edit:
Here is a clarification of the problem; the bluetooth connection sends commands every 105ms. If the user generates a bunch of events during that time they seem to que up. I would like to throw away any values generated between the connection events and just send one every 105ms.
This is basically what I'm doing right now:
-(IBAction) sliderChanged:(UISlider *)sender{
static int8_t value = 0;
int8_t new_value = (int8_t)sender.value;
if ( new_value > value + threshold || new_value < value - threshold ) {
value = new_value;
[btDevice writeValue:value];
}
}
What I'm asking is how to implement something like
-(IBAction) sliderChanged:(UISlider *)sender{
static int8_t value = 0;
if (105msHasPassed) {
int8_t new_value = (int8_t)sender.value;
if ( new_value > value + threshold || new_value < value - threshold ) {
value = new_value;
[btDevice writeValue:value];
}
}
}
