通过一个简单的基于网络的聊天应用程序学习 pubnub 应用于 Corona 的情况。有两个组件，一个是 Corona 中的按钮应用程序，用于发送基本消息和接收基本消息。第二个是一个简单的 html 文件，使用 javascript 发送和接收消息。只要我使用称为“演示”的发布和订阅键，该应用程序就可以正常工作。一旦我将 key 更改为我的 key (由 pubnub 提供)，就不会收到消息。我首先粘贴 html/javascript 代码，然后粘贴 Corona。我不明白当 html 没有定义任何键时它是如何订阅的，并且不太确定如何将我的键合并到 html 中。希望这是一个非常简单的问题，并且有人愿意简单地修改 JavaScript 以使我能够使用自己的 key 。首先是 html:
<html>
Enter Chat and press enter
<div><input id=input placeholder=you-chat-here /></div>
Chat Output
<div id=box></div>
<script src=http://cdn.pubnub.com/pubnub.min.js></script>
<script>(function(){
var box = PUBNUB.$('box'), input = PUBNUB.$('input'), channel = 'z';
PUBNUB.subscribe({
channel : channel,
callback : function(text) {
var tst = JSON.stringify(text);
var obj = eval ("(" + (''+tst).replace( /[<>]/g, '' ) + ")");
box.innerHTML = obj['msgtext'] + '<br>' + box.innerHTML; }
});
PUBNUB.bind( 'keyup', input, function(e) {
(e.keyCode || e.charCode) === 13 &&
PUBNUB.publish({
channel : channel,
message : { "msgtext": input.value },
x : (input.value='')
})
})
})()</script>
</html>
这是电晕代码:
--
-- Abstract: Button Events sample app, showing different button properties and handlers.
-- (Also demonstrates the use of external libraries.)
--
-- Version: 1.1
--
-- Sample code is MIT licensed, see http://www.coronalabs.com/links/code/license
-- Copyright (C) 2010 Corona Labs Inc. All Rights Reserved.
-- This example shows you how to create buttons in various ways by using the widget library.
-- The project folder contains additional button graphics in various colors.
--
-- Supports Graphics 2.0
-- Require the widget library
require "pubnub"
local widget = require( "widget" )
local background = display.newImage("carbonfiber.jpg", true) -- flag overrides large image downscaling
background.x = display.contentWidth / 2
background.y = display.contentHeight / 2
local roundedRect = display.newRoundedRect( 10, 50, 300, 40, 8 )
roundedRect.anchorX, roundedRect.anchorY = 0.0, 0.0 -- simulate TopLeft alignment
roundedRect:setFillColor( 0/255, 0/255, 0/255, 170/255 )
local t = display.newText( "waiting for button event...", 0, 0, native.systemFont, 18 )
t.x, t.y = display.contentCenterX, 70
-------------------------------------------------------------------------------
-- Create 5 buttons, using different optional attributes
-------------------------------------------------------------------------------
multiplayer = pubnub.new({
publish_key = "demo",
subscribe_key = "demo",
secret_key = nil,
ssl = nil,
origin = "pubsub.pubnub.com"
})
multiplayer:subscribe({
channel = "z",
callback = function(message)
t.text = "I RECEIVED: " .. message.msgtext
end,
errorback = function()
print("Oh no!!! Dropped 3G Conection!")
end
})
-- These are the functions triggered by the buttons
local button1Press = function( event )
t.text = "publish"
multiplayer:publish({
channel = "z",
message = { msgtext = "sent from corona!" }
})
end
local button1Release = function( event )
t.text = "Button 1 released"
end
local buttonHandler = function( event )
t.text = "id = " .. event.target.id .. ", phase = " .. event.phase
end
-- This button has individual press and release functions
-- (The label font defaults to native.systemFontBold if no font is specified)
local button1 = widget.newButton
{
defaultFile = "buttonRed.png",
overFile = "buttonRedOver.png",
label = "PUBLISH",
emboss = true,
onPress = button1Press
}
-- These other four buttons share a single event handler function, identifying
themselves by "id"
-- Note that if a general "onEvent" handler is assigned, it overrides the "onPress"
and "onRelease" handling
-- Also, some label fonts may appear vertically offset in the Simulator, but not on
device, due to
-- different device font rendering. The button object has an optional "offset"
property for minor
-- vertical adjustment to the label position, if necessary (example: offset = -2)
local button2 = widget.newButton
{
id = "button2",
defaultFile = "buttonYellow.png",
overFile = "buttonYellowOver.png",
label = "Button 2 Label",
labelColor =
{
default = { 51, 51, 51, 255 },
},
font = native.systemFont,
fontSize = 22,
emboss = true,
onEvent = buttonHandler,
}
local button3 = widget.newButton
{
id = "button3",
defaultFile = "buttonGray.png",
overFile = "buttonBlue.png",
label = "Button 3 Label",
font = native.systemFont,
fontSize = 28,
emboss = true,
onEvent = buttonHandler,
}
local buttonSmall = widget.newButton
{
id = "smallBtn",
defaultFile = "buttonBlueSmall.png",
overFile = "buttonBlueSmallOver.png",
label = " I'm Small",
fontSize = 12,
emboss = true,
onEvent = buttonHandler,
}
-- Of course, buttons don't always have labels
local buttonArrow = widget.newButton
{
id = "arrow",
defaultFile = "buttonArrow.png",
overFile = "buttonArrowOver.png",
onEvent = buttonHandler,
}
button1.x = 160; button1.y = 160
button2.x = 160; button2.y = 240
button3.x = 160; button3.y = 320
buttonSmall.x = 85; buttonSmall.y = 400
buttonArrow.x = 250; buttonArrow.y = 400
最佳答案
结合 Lua + JavaScript PubNub SDK
您需要确保您的 API key 已添加到两个 SDK 初始化中。 您可以使用以下示例在 JavaScript 和 Lua 中轻松完成此操作。
PubNub JavaScript
var PUBNUB = PUBNUB({ subscribe_key : 'demo', publish_key : 'demo' });
PubNub Lua Corona
multiplayer = pubnub.new({ publish_key = "demo", subscribe_key = "demo" })
通过 PubNub Customer Portal 获取您的 API key .
关于javascript - 如何通过 Corona 和 Javascript 使用 pubnub key ，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/26767427/