Angularjs - set view value is not updating display

问题

I got an input directive that should allow users to undo.

Enter saves the value using some function, Esc Cancel edits from the last save.

For the Esc keypress event i'm using ngmodel.$setViewValue(scope.last_saved_value) but the input is not updating. I know from the docs that this function does not trigger $digest so i put it in an $apply but it is still not working.

JSBIN example

回答1:

I usually both include and require the ngModel:

app.directive('cancelableInput', function($timeout) { 
  return { 
    restrict : "A",
    require : 'ngModel', 
    scope: {
      ngModel: '=?'
    },

Then, when you want to change the model value and have it update, you can just do:

scope.$apply(function() {
  scope.ngModel = scope.last_saved_value;
});

回答2:

Try calling ngmodel.$render(); after you do $setViewValue, it should help.

来源：https://stackoverflow.com/questions/22878064/angularjs-set-view-value-is-not-updating-display