从 iOS 应用程序调用云函数 [英] To call the cloud function from iOS app

问题描述

我已经开发了云功能来统计最后一天的投票数.

I've developed the cloud function to count the number of the votes within last day.

// 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 上没有用于此目的的 Swift 示例.请帮帮我！

I deployed the code successfully. But how to develop SWIFT code to call the function? Unfortinately no Swift example for that purpose at Parse.com. Please help me!

更新.1. 我正在使用@rickerbh 建议的代码

Upd. 1. I'm using the code suggested by @rickerbh

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.
  }
}

但是我得到了错误

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

推荐答案

这里是一些调用云代码函数的 swift 代码.

Here's some swift code that calls cloud code functions.

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.
  }
}

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