问题
I'm new to iPhone development.I have already gone through some of the exploring pages to create UIBackgroundModes key in Info.plist for iOS4 .But it is little bit difficult to understand . Kindly provide some step by step procedure with screenshot example for easy understanding...also specify what the requirements which are needed ie iPhone, OS version 4.0...
回答1:
The UIBackgroundModes key identifies which background tasks your application supports. Its value is an array that contains one or more strings with the following values:
- audio – The application plays audible content to the user while in the background.
- location – The application keeps users informed of their location, even while running in the background.
- voip – The application provides the ability for the user to make phone calls using an Internet connection.
You can edit the Info.plist file on Xcode. To add a new key, click on the + sign and write:
iOS 4
"UIBackgroundModes" as the key, make sure the type is set to string and then in value write audio, location or voip depending on your needs:
iOS 6
"Required background modes" as the key and then set the type in drop down menu.
回答2:
In IOS 13. It would be like the list given below.
来源：https://stackoverflow.com/questions/3413258/give-some-screenshots-to-create-uibackgroundmodes-key-in-info-plist-for-ios4