保存和加载变量的最佳方式是什么?
问题描述:
我有一堆像“购买升级”,“金额”等变量 我想要最有效的方式来保存这些变量,并在开始游戏时加载它们,因为你从未退出游戏(每一个事情保持不变)。 所以,所有的设置和变量保持不变,直到您重置游戏。保存和加载变量的最佳方式是什么?
我在问,因为我认为这是一个巨大且非常重要的部分,我想从最好的技术开始。
你有什么建议,我该如何在游戏中实现?
答
有两种方法可以很容易做到:
使用保存到您的DocumentDirectory一个简单的文本文件:使用保存到您的DocumentDirectory一个SQLite文件
local filePath = system.pathForFile("data.txt", system.DocumentsDirectory)
local file = io.open(filePath, "r")
if file then
-- read all contents of file into a string
local contents = file:read("*a")
print("Contents of " .. filePath)
print(contents)
io.close(file)
local t = display.newText("Contents of ", 5, 80, nil, 16);
t:setFillColor(1, 1, 136/255);
local t = display.newText(filePath, 5, 100, nil, 10);
t:setFillColor(1, 1, 136/255);
local ylast = 130
for line in io.lines(filePath) do
local t = display.newText(line, 15, ylast, nil, 14);
t:setFillColor(1, 1, 1);
ylast = ylast + 20
end
else
print("Creating file...")
-- create file b/c it doesn't exist yet
file = io.open(filePath, "w")
file:write("Feed me data!\n")
local numbers = {1,2,3,4,5,6,7,8,9}
file:write(numbers[1], numbers[2], numbers[3], "\n")
for _,v in ipairs(numbers) do
file:write(v, " ")
end
file:write("\nNo more data\n")
io.close(file)
local t = display.newText("Created file at:", 5, 80, nil, 16);
t:setFillColor(1, 1, 136/255);
local t = display.newText(filePath, 5, 100, nil, 10);
t:setFillColor(1, 1, 136/255);
local t = display.newText("Run app again to test file read.", 5, 130, nil, 12);
t:setFillColor(1, 1, 136/255);
-- This removes the file just created
-- os.remove(filePath)
end
2):
--Include sqlite
require "sqlite3"
--Open data.db. If the file doesn't exist it will be created
local path = system.pathForFile("data.db", system.DocumentsDirectory)
db = sqlite3.open(path)
--Handle the applicationExit event to close the db
local function onSystemEvent(event)
if(event.type == "applicationExit") then
db:close()
end
end
--Setup the table if it doesn't exist
local tablesetup = [[CREATE TABLE IF NOT EXISTS test (id INTEGER PRIMARY KEY, content, content2);]]
print(tablesetup)
db:exec(tablesetup)
--Add rows with a auto index in 'id'. You don't need to specify a set of values because we're populating all of them
local testvalue = {}
testvalue[1] = 'Hello'
testvalue[2] = 'World'
testvalue[3] = 'Lua'
local tablefill =[[INSERT INTO test VALUES (NULL, ']]..testvalue[1]..[[',']]..testvalue[2]..[['); ]]
local tablefill2 =[[INSERT INTO test VALUES (NULL, ']]..testvalue[2]..[[',']]..testvalue[1]..[['); ]]
local tablefill3 =[[INSERT INTO test VALUES (NULL, ']]..testvalue[1]..[[',']]..testvalue[3]..[['); ]]
db:exec(tablefill)
db:exec(tablefill2)
db:exec(tablefill3)
--print the sqlite version to the terminal
print("version " .. sqlite3.version())
--print all the table contents
for row in db:nrows("SELECT * FROM test") do
local text = row.content.." "..row.content2
local t = display.newText(text, 20, 120 + (20 * row.id), native.systemFont, 16)
t:setFillColor(1,0,1)
end
您还可以使用基于云的移动设备,实际上具有相同的功能。
将这些值保存到文件并在需要时加载它们。查看json以获取存储lua表的简单方法。关于您的问题,请参阅[问]或参加[旅游] – Piglet
@Piglet:您可以使用* Lua *来存储Lua表格。使用JSON来存储Lua表只是......愚蠢的。 –
@NicolBolas,你会不会照顾我,为什么这么傻? – Piglet