cocos2d-x lua 使用http(下载图片, POST JSON)

概述cocos2d-x lua 使用http(下载图片, POST JSON) version: cocos2d-x 3.6 1.使用http post json与服务器交互 require("src/cocos/cocos2d/json")require("src/cocos/network/NetworkConstants")-- post jsonlocal xhr = cc.XMLHt cocos2d-x lua 使用http(下载图片,POST JsON)

version: cocos2d-x 3.6

1.使用http post Json与服务器交互

require("src/cocos/cocos2d/Json")require("src/cocos/network/NetworkConstants")-- post Jsonlocal xhr = cc.XMLhttpRequest:new()xhr.responseType = cc.XMLhttpREQUEST_RESPONSE_JsONxhr:setRequestheader("Content-Type","application/Json")xhr:open("POST","www.baIDu.com")local function loginCallback()    print("xhr.readyState is:",xhr.readyState,"xhr.status is: ",xhr.status)    if xhr.readyState == 4 and (xhr.status >= 200 and xhr.status < 207) then        local response = xhr.response        local output = Json.decode(response)        -- print        table.foreach(output,function(i,v) print (i,v) end)        -- success ...    else        -- fail ...    endendxhr:registerScriptHandler(loginCallback)xhr:send(sendJson)

2.使用http get下载网络图片

-- get (image)pSprite:retain()  -- a spritelocal xhr = cc.XMLhttpRequest:new()-- tagxhr._urlfilename = urlfilenamexhr._urlSprite = pSpritexhr.responseType = cc.XMLhttpREQUEST_RESPONSE_STRINGxhr:open("GET","http://cocos2d-x.org/s/images/img-cocos2dx.jpg")local function onDownloadImage()    print("xhr.readyState is:",xhr.status)    if xhr.readyState == 4 and (xhr.status >= 200 and xhr.status < 207) then        local fileData = xhr.response        local fullfilename = cc.fileUtils:getInstance():getWritablePath() .. "/" .. xhr._urlfilename        local file = io.open(fullfilename,"wb")        file:write(fileData)        file:close()        local texture2d = cc.Director:getInstance():getTextureCache():addImage(fullfilename)        local pSprite = xhr._urlSprite        if texture2d then            pSprite:setTexture(texture2d)        end        pSprite:release() -- be careful    endendxhr:registerScriptHandler(onDownloadImage)xhr:send()

在使用xhr时，可以添加自己的数据（如：xhr._urlSprite = pSprite），存放用户的临时数据，方便返回时使用。 总结

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