電暈OOP多個實例共享屬性

Question

我有關於申請OOP電暈有點心理障礙的。我已經創建了一個時間選擇器，我希望在應用程序中重複使用多次。我試着將它的兩個實例放在同一個故事板場景中，但第一個拾取器上的按鈕控制數據並在第二個上顯示。所以他們分享數據，功能等等。我想知道有沒有人能告訴我我要去哪裏？這是我的timepicker類（timepicker2.lua）：

module(..., package.seeall) 

-- include Corona's "widget" library 
local widget = require "widget" 

--decorator-------------------- 
function decorate(obj, hr, min) --object to decorate 
print("--init new timepicker--") 

theHour = 0 
theMin = 0 
am = true 

function incHr(event) 
    print("inc") 
    if theHour < 12 then 
     theHour = theHour + 1 
    else 
     theHour = 1 
    end 

    if theHour < 10 then 
     hrText.text = "0"..theHour 
    else 
     hrText.text = theHour 
    end 
end 

increaseHrBtn = widget.newButton{ 
    default="gfx/up_regular.png", 
    over="gfx/up_press.png", 
    width=40, height=40, 
    onRelease = incHr 
} 

hrText = display.newText("0", 10, 41, native.systemFont, 24) 
hrText:setTextColor(0, 0, 0) 

local decHr = function (event) 
    print("inc") 
    if theHour > 1 then 
     theHour = theHour - 1 
    else 
     theHour = 12 
    end 
    if theHour < 10 then 
     hrText.text = "0"..theHour 
    else 
     hrText.text = theHour 
    end 
end 

decreaseHrBtn = widget.newButton{ 
    default="gfx/down_regular.png", 
    over="gfx/down_press.png", 
    width=40, height=40, 
    onRelease = decHr 
} 
decreaseHrBtn.y = 100 

dotsText = display.newText(":", 55, 39, native.systemFont, 24) 
dotsText:setTextColor(0, 0, 0) 

local incMin = function (event) 
    print("inc") 
    if theMin < 59 then 
     theMin = theMin + 1 
    else 
     theMin = 0 
    end 

    if theMin < 10 then 
     minText.text = "0"..theMin 
    else 
     minText.text = theMin 
    end 
end 

increaseMinBtn = widget.newButton{ 
    default="gfx/up_regular.png", 
    over="gfx/up_press.png", 
    width=40, height=40, 
    onRelease = incMin 
} 
increaseMinBtn.x = 100 

minText = display.newText("0", 90, 41, native.systemFont, 24) 
minText:setTextColor(0, 0, 0) 

local decMin = function (event) 
    print("dec") 
    if theMin > 0 then 
     theMin = theMin - 1 
    else 
     theMin = 59 
    end 
    if theMin < 10 then 
     minText.text = "0"..theMin 
    else 
     minText.text = theMin 
    end 
end 

decreaseMinBtn = widget.newButton{ 
    default="gfx/down_regular.png", 
    over="gfx/down_press.png", 
    width=40, height=40, 
    onRelease = decMin 
} 
decreaseMinBtn.y = 100 
decreaseMinBtn.x = 100 

local toggleAmPm = function (event) 
    if am == true then 
     am = false 
     ampmBtn:setLabel("PM") 
    else 
     am = true 
     ampmBtn:setLabel("AM") 
    end 
end 

ampmBtn = widget.newButton{ 
    default="gfx/blank_normal.png", 
    over="gfx/blank_press.png", 
    label = "AM", 
    font = "Korean Calligraphy", 
    fontSize = 25, 
    width=58, height=58, 
    onRelease = toggleAmPm 
} 

ampmBtn.x = 160 
ampmBtn.y = 58 

if hr > 12 then 
    if #hr < 2 then 
     hrText.text = "0"..hr 
    else 
     hrText.text = hr 
    end 
    theHour = hr-12 
    am = false 
    ampmBtn:setLabel("PM") 
else 
    if hr < 10 then 
     hrText.text = "0"..hr 
    else 
     hrText.text = hr 
    end 
    theHour = hr 
    if hr == 12 then 
     am = false 
     ampmBtn:setLabel("PM") 
    else 
     am = true 
     ampmBtn:setLabel("AM") 
    end 
end 

if min < 10 then 
    minText.text = "0"..min 
else 
    minText.text = min 
end 
theMin = min 

obj:insert(increaseHrBtn.view) 
obj:insert(decreaseHrBtn.view) 
obj:insert(increaseMinBtn.view) 
obj:insert(decreaseMinBtn.view) 
obj:insert(hrText) 
obj:insert(dotsText) 
obj:insert(minText) 
obj:insert(ampmBtn.view) 

end 

這裏的地方我使用它：

local reminder1Group = display.newGroup() 
TimePicker.decorate(reminder1Group, 0, 50) 
scrollView:insert(reminder1Group) 

我有一種感覺，我需要配合的功能給OBJ，但我用到底如何掙扎要做到這一點。希望有人能指出我正確的方向？ 非常感謝！

編輯！

修改（簡化）班至今：

module(..., package.seeall) 

local widget = require "widget" 

picker = {} 
picker.__index = picker 

function picker.new() 
    local picker_object = {} 
    setmetatable(picker_object,picker) 

    pickerGroup = display.newGroup() 

    picker_object.theHour = 0 
    picker_object.theMin = 0 
    picker_object.am = true 

    picker_object.increaseHrBtn = widget.newButton{ 
     default="gfx/up_regular.png", 
     over="gfx/up_press.png", 
     width=40, height=40, 
     onRelease = picker.incHr 
    } 

    picker_object.decreaseHrBtn = widget.newButton{ 
     default="gfx/down_regular.png", 
     over="gfx/down_press.png", 
     width=40, height=40, 
     onRelease = picker.decHr 
    } 

    picker_object.decreaseHrBtn.y = 100 

    pickerGroup:insert(picker_object.increaseHrBtn.view) 
    pickerGroup:insert(picker_object.decreaseHrBtn.view) 

    return picker_object 
end 

function picker:incHr(event) 
    print("inc") 
end 

function picker:decHr(event) 
    print("dec") 
end 

，並在那裏我把它叫做：

local TimePicker = require("timepicker2") 
local reminderPicker1 = TimePicker.picker.new() 

...現在想知道如何這個timepicker的物理方面進入一個滾動型！

Answer 1

我不知道科羅納最少的事情，更何況它是面向對象的系統，但你在你的函數中使用全局變量的事實令人懷疑......

theHour = 0 
theMin = 0 
am = true 

這些都是全局，Lua使用全球默認範式。所以除非你在他們之前放置了一個local關鍵字，否則他們將被你的整個應用程序共享。

Answer 2

您沒有使用OOP在這裏！全部！ 你在這裏所做的是你已經聲明瞭一個函數（儘管在一個單獨的模塊中）並且調用它。

有一個在這裏閱讀http://lua-users.org/wiki/SimpleLuaClasses 這裏http://lua-users.org/wiki/ObjectOrientationTutorial

這裏是你如何使用OOP的LUA（因此電暈）

local animals = {} 
animals.__index = animals 

function animals.new(params) 
    local animal_object = {} 
    setmetatable(animal_object,animals) 

    animal_object.name = params.name 

    return animal_object 
end 

function animals:getName() 
    return self.name 
end 

一個要點，這裏是你如何使用類

local dog = animals.new{name="dog"} 
local cat = animals.new{name="cat"} 

local name = dog:getName() 
print(name) -- prints "dog" 

local name = cat:getName() 
print(name) -- prints "cat 

你必須要注意的事情是，當你調用一個函數貓：的getName，而不是cat.getName（用分號來代替點）你通過'自我'作爲一個論點。
自我是類「動物」

「的「對象」