Another pickerWheel question - rollover effect not working (for me)

tuolden · November 28, 2013, 10:58pm

Hello all,

I’m still having trouble on doing a basic implementation of the date pickerWheel.

The “roll over effect” of the date, month, or year sometimes works and sometimes doesn’t work for me properly.

That is, when I place the pickerWheel in between Jan and Feb. it sometimes rolls over to the prev. month (Jan) or the next month (Feb) or

it just stays in the middle.

The problem is when it stays in the middle.

[sharedmedia=core:attachments:1036]

After I click the button (to get the values from the pickerWheel) which calls the function

 &nbsp; values = pickerWheel:getValues() &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; -- Update the status box text &nbsp; &nbsp; &nbsp; &nbsp; statusText.text = "Column 1: " .. values[1].value .. "\nColumn 2: " .. values[2].value .. "\nColumn 3: " .. values[3].value &nbsp;

And when I go to see the value, I get

Runtime error

: attempt to index field ‘?’ (a nil value)

stack traceback:

[C]: ?

…: in function '_onRelease’

?: in function '?'

?: in

Here is the complete code

local widget = require( "widget" ) local storyboard = require( "storyboard" ) local scene = storyboard.newScene() local values local pickerWheel local columnData local days = {} local years = {} -- Our scene function scene:createScene( event ) &nbsp;&nbsp;&nbsp;&nbsp;local group = self.view &nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;-- Display a background &nbsp;&nbsp;&nbsp;&nbsp;local background = display.newImage( "some\_screen\_background.png", true ) &nbsp;&nbsp;&nbsp;&nbsp;group:insert( background ) &nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;-- Status text box &nbsp;&nbsp;&nbsp;&nbsp;local statusBox = display.newRect( 50, 60, 210, 80 ) &nbsp;&nbsp;&nbsp;&nbsp;statusBox:setFillColor( 0, 0, 0 ) &nbsp;&nbsp;&nbsp;&nbsp;statusBox.alpha = 0.4 &nbsp;&nbsp;&nbsp;&nbsp;group:insert( statusBox ) &nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;-- Status text &nbsp;&nbsp;&nbsp;&nbsp;local statusText = display.newText( "Press the values button to show the current values.", 80, 350, 200, 0, native.systemFont, 18 ) &nbsp;&nbsp;&nbsp;&nbsp;statusText.x = statusBox.x &nbsp;&nbsp;&nbsp;&nbsp;statusText.y = statusBox.y - ( statusBox.contentHeight \* 0.5 ) + ( statusText.contentHeight \* 0.5 ) &nbsp;&nbsp;&nbsp;&nbsp;group:insert( statusText ) &nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;--------------------------------------------------------------------------------------------- &nbsp;&nbsp;&nbsp;&nbsp;-- widget.newPickerWheel() &nbsp;&nbsp;&nbsp;&nbsp;--------------------------------------------------------------------------------------------- &nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;for i = 1, 31 do &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;days[i] = i &nbsp;&nbsp;&nbsp;&nbsp;end &nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;for i = 1, 44 do &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;years[i] = 1969 + i &nbsp;&nbsp;&nbsp;&nbsp;end &nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;-- Set up the Picker Wheel's columns &nbsp;&nbsp;&nbsp;&nbsp;columnData =&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;{&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;{&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;align = "right", &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;width = 150, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;startIndex = 5, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;labels =&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;{ &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;{ &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;align = "left", &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;width = 60, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;startIndex = 18, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;labels = days, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;{ &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;align = "center", &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;width = 80, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;startIndex = 10, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;labels = years, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;}, &nbsp;&nbsp;&nbsp;&nbsp;} &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;-- Create a new Picker Wheel &nbsp;&nbsp;&nbsp;&nbsp;pickerWheel = widget.newPickerWheel &nbsp;&nbsp;&nbsp;&nbsp;{ &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;top = 210, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;font = native.systemFontBold, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;columns = columnData, &nbsp;&nbsp;&nbsp;&nbsp;} &nbsp;&nbsp;&nbsp;&nbsp;group:insert( pickerWheel ) &nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;local function showValues( event ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;-- Retrieve the current values from the picker &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;values = pickerWheel:getValues() &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;-- Update the status box text &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;statusText.text = "Column 1: " .. values[1].value .. "\nColumn 2: " .. values[2].value .. "\nColumn 3: " .. values[3].value &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;-- Update the status box text position &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;statusText.x = statusBox.x &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;statusText.y = statusBox.y - ( statusBox.contentHeight \* 0.5 ) + ( statusText.contentHeight \* 0.5 ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;pickerWheel.isVisible = false &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return true &nbsp;&nbsp;&nbsp;&nbsp;end &nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;local getValuesButton = widget.newButton &nbsp;&nbsp;&nbsp;&nbsp;{ &nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;left = 10, &nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;top = 150, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;width = 298, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;height = 56, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;id = "getValues", &nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;label = "Values", &nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;onRelease = showValues, &nbsp;&nbsp;&nbsp;&nbsp;} &nbsp;&nbsp;&nbsp;&nbsp;group:insert( getValuesButton ) &nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;local function showWheel( event ) &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;-- show the wheel again &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;pickerWheel.isVisible = true &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return true &nbsp;&nbsp;&nbsp;&nbsp;end &nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;local getWheelButton = widget.newButton &nbsp;&nbsp;&nbsp;&nbsp;{ &nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;left = 310, &nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;top = 150, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;width = 298, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;height = 56, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;id = "getValues", &nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;label = "Show Wheels", &nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;onRelease = showWheel, &nbsp;&nbsp;&nbsp;&nbsp;} &nbsp;&nbsp;&nbsp;&nbsp;group:insert( getWheelButton )&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp; end scene:addEventListener( "createScene" ) return scene &nbsp;

Could it be the config.lua file?

&nbsp; application = &nbsp; &nbsp;{ &nbsp; &nbsp; &nbsp; content = &nbsp; &nbsp; &nbsp; { &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;width = 640, &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;height = 960, &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;scale = "letterBox", &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;xAlign = "center", &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;yAlign = "center", &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;imageSuffix = &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;{ &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ["@2x"] = 1.5, &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ["@4x"] = 3.0, &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;}, &nbsp; &nbsp; &nbsp; }, &nbsp; &nbsp;} &nbsp;

rob · November 29, 2013, 2:33am

This is a known bug. Engineering is working on it.

Rob

contreras2004 · December 5, 2013, 6:30pm

Has this been solved? or this bug is still there?

Im having the same issue

rob · December 6, 2013, 1:34am

I was messing around with it earlier this week and it seems to be snapping and not landing in between, but my attempts were pretty limited.

Rob

contreras2004 · December 6, 2013, 1:57am

Rob im experiencing another “weird” behavior with the picker wheel. When you scroll, the picker wheel keeps rolling untill its stops and immediatly after it stops it scrolls back to the same value from where it began or some other value next to it. This is happening in the simulator AND in an android device (HP 7’ tablet). ¿Any ideas?

rob · December 6, 2013, 1:59am

The forums say you are a starter account, so those fixes have not been rolled out to the public build yet. We are working on getting these out to the Starter and Basic accounts sooner than later.

Rob

contreras2004 · December 6, 2013, 2:03am

Thank you Rob

rob · November 29, 2013, 2:33am