javascript - 如何从回调函数中获取变量的值？

Question

我想从回调函数中获取联系人值。

如何拥有我的 this.recherche = 联系人 ？

App.provider('ContactsP', function() {

this.$get = function() {
  return function(search) {

    console.log('Factory ContactsCtrl RECHERCHE : ' + search);

    this.recherche = [];
    this.options = new ContactFindOptions();
    this.options.filter = search;
    this.options.multiple = true;
    this.fields = ["displayName", "name", "phoneNumbers"];

    navigator.contacts.find(this.fields, function(contacts) {

      //I want to put contacts into this.recherche but that doesn't work....

     this.recherche = contacts; return contacts;

    }, function(e) {
      console.log("Error finding contacts " + e.code)
    }, this.options);

  };
};

Answer 1

问题是，当您处于回调中时，您对 this 的引用不是您的封闭对象。您需要使用angular.bind传递对象的上下文。

navigator.contacts.find(this.fields, angular.bind(this, function(contacts) {

      //I want to put contacts into this.recherche but that doesn't work....

     this.recherche = contacts; return contacts;

    }), function(e) {
      console.log("Error finding contacts " + e.code)
    }, this.options);