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How can I determine if a user has an iOS app installed?
Is it possible to check if, for example the Twitter or Pinterset or any app is installed on an iOS device from within your app?
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Not directly possible using the SDK. If an application you're looking for registers a URL scheme that it can open, then you can check for the presence of that app using the UIApplication -canOpenURL: method, as documented here.
于 2012-09-25T17:58:12.197 回答