##Quesiont: Cannot run WebKit's WKWebView on iOS device on iOS 11.3 ? Using XCode 9.3,and build Webkit failed on iphone device. I can successfully build Webkit for iOS simulator and run on simulator and debug the WKWebView i use in the app. But when it turned to the iphone device, it failed. I cannot run target iphone app within the workspace which use the WebKit.framework builded from the workspace. After i use automatically signing the WebKit project and it said alowable-client and enable-bitcode and use together. Then i disable bitcode and finally i could run my target app. But the target app cant use the WKWebView i build ,it use the iphone system internal WKWebView, so i cannot debug webkit on iphone device. XCode also print some wanning like this: ld: warning: directory not found for option '-L/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS11.3.sdk/System/Library/PrivateFrameworks/WebCore.framework/Frameworks' ld: warning: directory not found for option '-F/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS11.3.sdk/System/Library/PrivateFrameworks' ld: warning: directory not found for option '-F/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS11.3.sdk/System/Library/PrivateFrameworks'