Here's how you can prevent iTunes from automatically opening when you connect your iPhone, iPad or iPod to your computer. 1. Connect your iOS device to your computer. 2. Click on the device in iTunes. 3. Go to the Summary tab. 4. Go to the Options section of the Summary tab. 5. Make sure the checkbox next to "Open iTunes when this iPhone/iPad/iPod is connected" is unchecked. Now iTunes will no longer open automatically each time you connect your iOS device to your Mac or PC.
For more, see the original article at the link below.