scrollToVisible error while testing on a device, UIAutomation - ui-automation

Question

For this line of test code : view.scrollViews()[0].tapWithOptions({tapOffset:{x:0.32, y:0.25}})
I am getting this error
2012-11-02 18:09:23 +0000 None: Script threw an uncaught JavaScript error: target.frontMostApp().mainWindow().scrollViews()[0] could not be tapped on line 244 of feature.js
2012-11-02 18:09:23 +0000 Debug: target.frontMostApp().mainWindow().scrollViews()[0].tapWithOptions({tapOffset:{x:"0.32", y:"0.25"}})
2012-11-02 18:09:23 +0000 Debug: target.frontMostApp().mainWindow().scrollViews()[0].scrollToVisible()
2012-11-02 18:09:23 +0000 Debug: target.frontMostApp().mainWindow().scrollViews()[0] - scrollToVisible cannot be used on the element because it does not have a scrollable ancestor.
2012-11-02 18:09:23 +0000 Debug: target.frontMostApp().mainWindow().scrollViews()[0] - scrollToVisible cannot be used on the element because it does not have a scrollable ancestor.
2012-11-02 18:09:23 +0000 Debug: target.frontMostApp().mainWindow().scrollViews()[0] could not be tapped
The logelement tree looks like this
UIATarget "MyiPadname" {{0, 0}, {1024, 768}}
elements: {
UIAApplication "myAppName" {{0, 0}, {1024, 768}}
elements: {
UIAWindow "(null)" {{0, 0}, {1024, 768}}
elements: {
UIAScrollView "(null)" {{0, 0}, {1024, 768}}
elements: {
UIAImage "(null)" {{1017, 761}, {7, 7}}
UIAImage "(null)" {{1017, 761}, {7, 7}}
}
UIAImage "nav_bar.png" {{0, 724}, {1024, 44}}
UIAButton "button featured" {{0, 730}, {134, 39}}
UIAButton "See the world" {{134, 730}, {223, 39}}
UIAButton "button my favorites" {{357, 730}, {180, 39}}
UIAButton "button settings" {{967, 736}, {33, 27}}
}
}
}
I am using XCode 4.5.1 . Can anyone help me to fix this . Thanks

Answer 1

Are you, by any chance, using iOS 5.x simulator or iOS 5.x device? If yes then I am seeing the same issue. I believe Xcode 4.5.1 does not like ScrollViews.
But, I found a workaround.
My element is looks like :
target.frontMostApp().mainWindow().scrollViews()[0].buttons()["Wikipedia"]
So, instead of accessing the button directly, I am trying to access a staticText for the button.
target.frontMostApp().mainWindow().scrollViews()[0].buttons()["Wikipedia"].staticTexts()["Wikipedia"].tap();
I hope this works for you.

Answer 2

I am getting the same error when doing flickInsideWithOptions on a scroll view. I believe that the automation framework is trying to scroll to the element you want to tap first but if the scrolling is disabled for some reason, it fails with the error you mentioned.
There is only one way how to fix it - the automation framework can't know that we are tapping into a scroll view - we have to avoid its special versions of the tap/swipe/flick functions. We will tap on mainWindow instead, e.g.
var buttonRect = button.rect();
var windowRect = mainWindow.rect();
var xPos = (20 + buttonRect.origin.x) / windowRect.size.width;
var yPos = (50 + buttonRect.origin.y) / windowRect.size.height;
mainWindow.tapWithOptions({tapOffset:{x:xPos, y:yPos}});