如何在 Lua 中显示数组元素? [英] How do I display array elements in Lua?
问题描述
我在用 Lua 编程语言显示数组元素时遇到问题.基本上,我创建了一个包含 3 个元素的数组,并且我试图在 corona sdk 模拟器上的 for 循环中显示其内容.发生的情况是,如果我显示单个数组元素(没有循环),它们显示正常;一旦我将它们放入 for 循环中,屏幕上就不再显示任何内容
I'm having an issue displaying the elements of an array in Lua programming language. Basically, i created an array with 3 elements, and i'm trying to display its contents in a for loop on the corona sdk emulator. What happens is that if i display the individual array elements (without the loop), they display fine; as soon as I put them in a for loop, nothing shows up on the screen anymore
这是我的代码:
myText = {"hello", "world", "there"}
for i = 1, myText do
local myText = display.newText( myText[i], 0, 0, native.systemFont, 35 )
end
推荐答案
这是我编写的一个函数,用于列出表格中的项目(corona 将数组称为表格").类似于PHP的print_r,所以我叫它print_r
Here is a function I wrote to list the items in a table (corona calls arrays as "tables"). It is similar to PHP's print_r, so I called it print_r
您可以将其称为:
print_r(myTable)
功能:
function print_r(arr, indentLevel)
local str = ""
local indentStr = "#"
if(indentLevel == nil) then
print(print_r(arr, 0))
return
end
for i = 0, indentLevel do
indentStr = indentStr.." "
end
for index,value in pairs(arr) do
if type(value) == "table" then
str = str..indentStr..index..":
"..print_r(value, (indentLevel + 1))
else
str = str..indentStr..index..": "..value.."
"
end
end
return str
end
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