Cannot find protocol declaration for NSURLConnectionDataDelegate

Question

I am working on ios5 and have used NSURLConnectionDataDelegate in my application which really works fine for me. But I run the same project on ios 4.3 I am getting the error :

Cannot find protocol declaration for NSURLConnectionDataDelegate

Can someone help me here?

Answer 1

I found the solution. Instead of NSURLConnectionDataDelegate we should use NSURLProtocolClient.

Answer 2

This was introduced in iOS 5. Several protocols that were informal in iOS 4 related to NSURLConnection became formalized in iOS 5. In this case, if you need to support iOS 4 - you will need to do this in a different way.

Answer 3

i had the same problem..dont know if my solution is 100% correct but i tried weak linking some frameworks..and then run again.. or removing and relinking them again.