How to clear field value after the field is disabled

a!localVariables(
  local!field1,
  local!field2,
  {
    a!cardLayout(
      contents: {
        a!radioButtonField(
          choiceLabels: { "Yes", "No" },
          choiceValues: { 1, 2 },
          label: "Radio Buttons",
          labelPosition: "ABOVE",
          value: local!field1,
          saveInto: {
            local!field1,
            if(
              and(
                local!field1 = 2,
                a!isNotNullOrEmpty(local!field1)
              ),
              a!save(local!field2, null),
              ""
            )
          },
          choiceLayout: "STACKED",
          validations: {}
        ),
        a!integerField(
          label: "Integer",
          labelPosition: "ABOVE",
          value: local!field2,
          saveInto: { local!field2 },
          refreshAfter: "UNFOCUS",
          validations: {},
          disabled:if(a!isNotNullOrEmpty(local!field1),
          local!field1=2,null)
        )
      },
      height: "AUTO",
      style: "TRANSPARENT",
      marginBelow: "STANDARD"
    )
  }
)

Write save on field 1 that makes field2 value null. Have a look into the sample code .

Hi [mention:2aea1bf0b6954f94815518e79da990c7:e9ed411860ed4f2ba0265705b8793d05] 

Please have a look into this sample code. I hope this will helpful.

a!localVariables(
  local!limited,
  local!limit,
  {
    a!cardLayout(
      contents: {
        a!radioButtonField(
          choiceLabels: { "Yes", "No" },
          choiceValues: { 1, 2 },
          label: "Limited ?",
          labelPosition: "ABOVE",
          value: local!limited,
          saveInto: {
            local!limited,
            a!save(local!limit,null)
           
          },
          choiceLayout: "STACKED",
          validations: {}
        ),
        a!integerField(
          label: "Limit",
          labelPosition: "ABOVE",
          value: local!limit,
          saveInto: { local!limit },
          refreshAfter: "UNFOCUS",
          validations: {},
          disabled: or(a!isNullOrEmpty(local!limited),local!limited=2)
          
          
        )
      },
      height: "AUTO",
      style: "TRANSPARENT",
      marginBelow: "STANDARD"
    )
  }
)

The important concept in Appian SAIL is, that we do not modify a UI component, but only the underlying data we feed into that component. So to remove a value displayed in one field, just delete that value in a saveInto in another field using a!safe().