Javascript 从iOS应用程序调用云函数

我开发了云函数来计算最后一天的投票数

// Use Parse.Cloud.define to define as many cloud functions as you want.
// For example:

Parse.Cloud.define("confidenceRating", function(request, response) {
    // To define vars yesterday and today
    var today = new Date();
    var yesterday = today.setDate(today.getDate() - 1);

    // "score" is the table's name       
    var query = new Parse.Query("score");

    // filter the query, 2 filters to be applied
    query.greaterThanOrEqualTo("createdAt", yesterday);
    query.lessThan("createdAt", today);

    // perfom the action
    query.find({
        success: function(results) {
            var votes = results.length;
            response.success(votes);
        },
        error: function() {
            response.error("something went wrong");
        }
    });
});

我成功地部署了代码。但是如何开发SWIFT代码来调用函数呢？不幸的是，Parse.com上没有任何用于此目的的Swift示例。请帮帮我

Upd。1.我正在使用@rickerbh建议的代码

PFCloud.callFunctionInBackground("confidenceRating", withParameters: nil) { results, error in
  if error != nil {
    // Your error handling here
  } else {
    // Deal with your results (votes in your case) here.
  }
}

但我发现了错误

2014-12-12 12:19:52.399 Rating[4082:166266] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[__NSPlaceholderDictionary initWithObjects:forKeys:count:]: attempt to insert nil object from objects[1]' *** First throw call stack: ( 0 CoreFoundation 0x012d3946 __exceptionPreprocess + 182

---

下面是一些调用云代码函数的swift代码

let parameters = ["": ""]
PFCloud.callFunctionInBackground("confidenceRating", withParameters: parameters) { results, error in
  if error != nil {
    // Your error handling here
  } else {
    // Deal with your results (votes in your case) here.
  }
}

---

这会使编译器@Maga崩溃，可能会传入一个空字典作为参数。您的编译器发出的错误消息是什么？它不会使我的编译器崩溃…2014-12-12 12:19:52.399评级[4082:166266]***由于未捕获的异常“NSInvalidArgumentException”而终止应用程序，原因：“***-[\u NSPlaceholderDictionary initWithObjects:forKeys:count:：尝试从对象[1]插入nil对象”'***第一次抛出调用堆栈：0 CoreFoundation 0x012d3946\uu异常预处理+182@Maga这看起来不像是编译器崩溃。看起来像是运行时崩溃。你能用你实现的调用函数的代码更新你的问题吗？@Maga啊，看起来你肯定需要传入一些参数。检查更新的代码块。