How do I call an objective-c method?

How do I call fetch method from within a render method in Backbone.js?

• Hi I am trying to call fetch method to  get a collection of models from inside a render method but the before  the fetch method gets called other lines of the render method are  executed and finally the fetch method is called. Can  anyone help me to pause the lines following the fetch method till all  the models are fetched and then complete the render method. Thanks

• Answer:

  You could override the fetch method and trigger callbacks on success and error of your fetch method. Check the code below... Model var TestModel = Backbone.Model.extend({ fetch: function () { var self = this; var fetchOptions = { success: function (model, data) { self.trigger('TestView:ResponseReceivedSuccess', data); }, error: function (model, error) { self.trigger('TestView:ResponseReceivedError', error); }, type: 'GET', contentType: 'application/json', async: false }; self.trigger('TestView:RequestSent'); Backbone.Model.prototype.fetch.call(self, fetchOptions); } }); View var TestView = Backbone.View.extend({ initialize: function () { this._bindModelChangeEvents(); this.model.fetch(); }, _bindModelChangeEvents: function () { var self = this; this.model.on('TestView:ResponseReceivedError', function () { // error while fetch }); this.model.on('TestView:ResponseReceivedSuccess', function (data) { // do something with your data here }); } });