Showing radio button input type
$this->form[] = ['label'=>'Platform','name'=>'platform','type'=>'radio','dataenum'=>'Android;Ios;Website'];Important . You need to set the dataenum attribute, then fill it with the options. The sparate is comma.
$this->form[] = ['label'=>'Platform','name'=>'platform','type'=>'radio','dataenum'=>'1|Android;2|Ios;3|Website'];If you want to custom the value of radio button, then put | as a sparator between the value and label.