how to check application installed application in iphone deveice using iphone sdk [closed]

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I am developing an application in which i need to find the apps which are already installed in iphone device such as Skype, facebook. I need to check it using objective -c . Please give me code snippet if possible otherwise a link to get the solution. Is it possible or not.

Thanks in advance ....开发者_JAVA技巧..

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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.

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This is not possible using any public API's.