Hi,
We have an error using Gestures only on iPad Mini and iPad Air, we have an app that works perfectly on iPad 2, iPad Retina, iPhone 5S , iPhone 5C and iTouch late generation, but when the app is used on an iPad Mini, the gestures doesn’t work.
Within the code, we use event.x and event.xStart to see if the user is making a swipe, on iPad Mini, the event.xStart always return 0.
Any ideas??
Thanks in advance.
Hi @jose.silva,
What object are you detecting touch upon? We’ll almost definitely need to see some code on how you’re doing this…
Brent
Hi Brent, we’re using the dmc_gesture file that comes with Kwiksher, but everything works fine except on iPads Mini… here is the code for the Handler…
function swipeTouchHandler( event )
–print( “swipeTouchHandler”, event )
--print (“swipeTouchHandler”, event.x , event.xStart)
local obj = event.target
local dmc = obj.__dmc.gesture
local et, xDelta, yDelta, vector, angle
– create our event to dispatch
local e = {
name = SWIPE_EVENT,
phase = event.phase,
target = obj,
direction = nil,
touch = {}
}
–== Start processing the Corona touch event ==–
if event.phase == ‘began’ then
TouchMgr:setFocus( event.target, event.id )
– fill in event and dispatch
et = e.touch
et.xStart = event.xStart
et.yStart = event.yStart
et.x = event.x
et.y = event.y
if obj.dispatchEvent ~= nil then
obj:dispatchEvent( e )
end
return true
elseif event.phase == ‘moved’ then
if event.isFocused then
xDelta = event.x - event.xStart
yDelta = event.y - event.yStart
vector = vector_given_x_y( xDelta, yDelta )
angle = angle_given_x_y( xDelta, yDelta )
e.swipe = {
angle = angle,
length = vector
}
– fill in rest of event and dispatch
et = e.touch
et.xStart = event.xStart
et.yStart = event.yStart
et.x = event.x
et.y = event.y
if obj.dispatchEvent ~= nil then
obj:dispatchEvent( e )
end
return true
end
elseif ( event.phase == ‘ended’ or event.phase == ‘canceled’ ) then
if event.isFocused then
TouchMgr:unsetFocus( event.target, event.id )
if dmc == nil or obj == nil or obj.dispatchEvent == nil then
return true
end
if dmc.useStrictBounds then
– print (“1”)
local bounds = obj.contentBounds
--print (“Event x ----->>”, event.x …" - " … bounds.xMin … " - " …bounds.xMax)
xDelta = checkBounds( event.x, { bounds.xMin, bounds.xMax } ) - event.xStart
yDelta = checkBounds( event.y, { bounds.yMin, bounds.yMax } ) - event.yStart
else
– print (“2” … " *** " … event.x , event.xStart)
xDelta = event.x - event.xStart
yDelta = event.y - event.yStart
end
--print (“3”)
--print (“xDelta”, xDelta, yDelta)
vector = vector_given_x_y( xDelta, yDelta )
angle = angle_given_x_y( xDelta, yDelta )
e.swipe = {
angle = angle,
length = vector
}
--print (“vector y swipelenght”, vector, dmc.swipeLength)
if vector >= dmc.swipeLength then
e.direction = direction_given_angle( angle, dmc.limitAngle )
end
– fill in rest of event and dispatch
et = e.touch
et.xStart = event.xStart
et.yStart = event.yStart
et.x = event.x
et.y = event.y
if obj.dispatchEvent ~= nil then
obj:dispatchEvent( e )
end
return true
end
end
end
Hi @jose.silva,
Well, we can’t provide much support for 3rd-party code. Please test this using the following simplified code, and confirm if you’re still getting incorrect responses on the iPad Mini.
This code detects the touch point data on the entire display stage. If this works on all devices, then the issue is probably in your code, not the Corona core.
[lua]
local function touchTest( event )
if event.phase == “began” then
print( “event.phase”, event.phase )
print( “event.x”, event.x )
print( “event.y”, event.y )
print( “event.xStart”, event.xStart )
print( “event.yStart”, event.yStart )
end
end
display.currentStage:addEventListener( “touch”, touchTest )
[/lua]
Brent
Hi Brent,
Thanks for your answer, we found that if we had enabled the System. Multitouch, the iPad Mini doesn’t work well detecting swipes.
Thanks for your kindly help.
Best
I found the following incident. I am going to test it with the latest daily build.
https://forums.coronalabs.com/topic/57535-coronaviewer-stopped-working/?p=300725
Hi @jose.silva,
What object are you detecting touch upon? We’ll almost definitely need to see some code on how you’re doing this…
Brent
Hi Brent, we’re using the dmc_gesture file that comes with Kwiksher, but everything works fine except on iPads Mini… here is the code for the Handler…
function swipeTouchHandler( event )
–print( “swipeTouchHandler”, event )
--print (“swipeTouchHandler”, event.x , event.xStart)
local obj = event.target
local dmc = obj.__dmc.gesture
local et, xDelta, yDelta, vector, angle
– create our event to dispatch
local e = {
name = SWIPE_EVENT,
phase = event.phase,
target = obj,
direction = nil,
touch = {}
}
–== Start processing the Corona touch event ==–
if event.phase == ‘began’ then
TouchMgr:setFocus( event.target, event.id )
– fill in event and dispatch
et = e.touch
et.xStart = event.xStart
et.yStart = event.yStart
et.x = event.x
et.y = event.y
if obj.dispatchEvent ~= nil then
obj:dispatchEvent( e )
end
return true
elseif event.phase == ‘moved’ then
if event.isFocused then
xDelta = event.x - event.xStart
yDelta = event.y - event.yStart
vector = vector_given_x_y( xDelta, yDelta )
angle = angle_given_x_y( xDelta, yDelta )
e.swipe = {
angle = angle,
length = vector
}
– fill in rest of event and dispatch
et = e.touch
et.xStart = event.xStart
et.yStart = event.yStart
et.x = event.x
et.y = event.y
if obj.dispatchEvent ~= nil then
obj:dispatchEvent( e )
end
return true
end
elseif ( event.phase == ‘ended’ or event.phase == ‘canceled’ ) then
if event.isFocused then
TouchMgr:unsetFocus( event.target, event.id )
if dmc == nil or obj == nil or obj.dispatchEvent == nil then
return true
end
if dmc.useStrictBounds then
– print (“1”)
local bounds = obj.contentBounds
--print (“Event x ----->>”, event.x …" - " … bounds.xMin … " - " …bounds.xMax)
xDelta = checkBounds( event.x, { bounds.xMin, bounds.xMax } ) - event.xStart
yDelta = checkBounds( event.y, { bounds.yMin, bounds.yMax } ) - event.yStart
else
– print (“2” … " *** " … event.x , event.xStart)
xDelta = event.x - event.xStart
yDelta = event.y - event.yStart
end
--print (“3”)
--print (“xDelta”, xDelta, yDelta)
vector = vector_given_x_y( xDelta, yDelta )
angle = angle_given_x_y( xDelta, yDelta )
e.swipe = {
angle = angle,
length = vector
}
--print (“vector y swipelenght”, vector, dmc.swipeLength)
if vector >= dmc.swipeLength then
e.direction = direction_given_angle( angle, dmc.limitAngle )
end
– fill in rest of event and dispatch
et = e.touch
et.xStart = event.xStart
et.yStart = event.yStart
et.x = event.x
et.y = event.y
if obj.dispatchEvent ~= nil then
obj:dispatchEvent( e )
end
return true
end
end
end
Hi @jose.silva,
Well, we can’t provide much support for 3rd-party code. Please test this using the following simplified code, and confirm if you’re still getting incorrect responses on the iPad Mini.
This code detects the touch point data on the entire display stage. If this works on all devices, then the issue is probably in your code, not the Corona core.
[lua]
local function touchTest( event )
if event.phase == “began” then
print( “event.phase”, event.phase )
print( “event.x”, event.x )
print( “event.y”, event.y )
print( “event.xStart”, event.xStart )
print( “event.yStart”, event.yStart )
end
end
display.currentStage:addEventListener( “touch”, touchTest )
[/lua]
Brent
Hi Brent,
Thanks for your answer, we found that if we had enabled the System. Multitouch, the iPad Mini doesn’t work well detecting swipes.
Thanks for your kindly help.
Best
I found the following incident. I am going to test it with the latest daily build.
https://forums.coronalabs.com/topic/57535-coronaviewer-stopped-working/?p=300725