How To Call It
System is a global table: call its functions with a dot (System.<method>(...)), not a colon.
Object MethodSystem Control
System.screenWidth()
Returns the current screen width in pixels.
Documented for app version 1.0.51Updated:
When To Use It
In system flow, design steps as observe first and act second when the API can affect device state.
Parameters and Return
Takes no arguments. Returns a number.
Best Combined With
Using this API with logging, error handling, and next-step control produces much more professional results than calling it in isolation.
Example Usage
The snippet below is a starter pattern that can be applied directly in runtime flow.
local result = System.screenWidth()Copyable Progressive Examples
From foundation to combined usage, each level is provided as a separate code block so you can copy the level you need and adapt it directly.
local result = System.screenWidth()local stepOk = true
local result = System.screenWidth()
if stepOk then
wait(200)
endlocal ok, err = pcall(function()
local result = System.screenWidth()
end)
if not ok then
print("API step failed: System.screenWidth: " .. tostring(err))
requestStop()
end-- In system flow, design steps as observe first and act second when the API can affect device state.
local function run_screenwidth_step()
local result = System.screenWidth()
end
local ok, err = pcall(run_screenwidth_step)
if not ok then
toast("Step failed")
print(err)
endlocal result = System.screenWidth()
wait(200)
print("Combined with logging and flow control")