異步調用backendless數據

Question

這工作，但它在通話過程凍結頁：

getAllNewEstate: function(callback) { 
    function NewEstateData() {}; 
    var items = Backendless.Persistence.of(NewEstateData).find().data; 
    callback(items) 
    }, 

如何我做異步調用？

文檔： http://backendless.com/documentation/data/js/data_sync_and_async_calls.htm http://backendless.com/documentation/data/js/data_basic_search.htm

更新

我想：

getAllNewEstate: function(callback) { 
    function NewEstateData() {}; 
    Backendless.Persistence.of(NewEstateData).find(function(e) { 
     console.log('event', e); 
     callback(e.data); 
    }); 
    }, 

//沒有錯誤，不執行console.log，

getAllNewEstate: function(callback) { 
    Backendless.Persistence.of(NewEstateData).find(function(e) { 
     console.log('event', e); 
     callback(e.data); 
    }); 
    }, 

//未捕獲的ReferenceError：NewEstateData沒有定義

Answer 1

您需要添加回調調用異步發現：

getAllNewEstate: function(callback) { 
    function NewEstateData() {}; 
    Backendless.Persistence.of(NewEstateData).find(new Backendless.Async(
     function(e) { 
      console.log(e); 
      callback(e); 
     }) 
    ); 
}