dyld: Symbol not found: _OBJC_CLASS_$_SKStoreProductViewController
Referenced from: /Users/mac/Library/Application Support/iPhone Simulator/5.1/Applications/9E3E8EA8-071A-4E9E-99A8-FFF6B2A3E740/brnn.app/brnn
Expected in: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.1.sdk/System/Library/Frameworks/StoreKit.framework/StoreKit
in /Users/mac/Library/Application Support/iPhone Simulator/5.1/Applications/9E3E8EA8-071A-4E9E-99A8-FFF6B2A3E740/brnn.app/brnn
解决方案是把遇到framework 修改为optional