Question

var jsonData = Model.CheckData(); 

// If i get the response for then, i must pass the response to the following functions which are below.

if (!jsonData) {
    Ti.API.warn("JsonData");
    SendRes(jsonData);
}

The problem i am facing is, the functions are getting executed before i get the response at the first place. It should happen sequentially.

Note: I cannot call the function SendRes on my Json OnLoad, as its in a different class all together.

Answer 1

I assume Model.CheckData() is an AJAX call. You can give it a callback once ajax is done. You will have to modify that call to accept a callback:

//pass a callback to CheckData
Model.CheckData(function(jsonData){
    //do something with jsonData
    if (!jsonData) {
        Ti.API.warn("JsonData");
        SendRes(jsonData);
    }
});

//while in the CheckData function
function CheckData(callback){
    ...ajax call...
    //execute this on receive where "response" is your JSON
    callback(response);
}