There is no SDK with the name or path "iphoneos4.0"
<p>I download a sample of UICatalog and run it.When I compile it ,it shows the failed message:There is no SDK with the name or path "iphoneos4.0".I find the "Base SDK" of UICatalog's Targets is iphone Device 4.0(missing).How can I solve this question and run it.</p>

<p>Thank you!</p>
