scaling answer in ios

[kartikApplore]

while scaling answer in ios , it shows the label of 5 as 4 , but working fine in android

[devAtInsight]

I encountered this issue just recently and fixed it here.

Minimal repro:

• create a Slider from 1 to 10 with steps of 1 in-between (or 1.0 to 10.0 with 1.0 steps, doesn't matter)
• on iOS the issue is that as you drag the slider, the value label will display 1, 2, 3, 4, 5, 6, 6, 8, 9 and 10. If you log the values in the onChanged callback here:
  Slider.adaptive( value: _sliderValue, onChanged: (double value) { print("Slider value: $value");

for some reason they are 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 6.9999999, 8.0, 9.0 and 10.0

• which means if we call _sliderValue.toInt() that will truncate and result in two 6s displayed in the label.
• the issue does indeed not occur on Android

Proposed fix:

• toInt() I think is not needed anyway, round() should work fine instead
• changing that in all three spots ensures that both the label and the valueIdentifier are in sync
• the result argument of the ScaleQuestionResult got the _sliderValue directly anyway so no change needed there