Error message:
Undefined symbols for architecture arm64: "_OBJC_CLASS_$_WKWebViewJavascriptBridge", referenced from: type metadata accessor for __ObjC.WKWebViewJavascriptBridge in ViewController.o ld: symbol(s) not found for architecture arm64 clang: error: linker command failed with exit code 1 (use -v to see invocation)
解决：
Phew, finally got it working by editing the bridge header.
In file WKWebViewJavascriptBridge.h, find these lines:
#if (__MAC_OS_X_VERSION_MAX_ALLOWED > __MAC_10_9 || __IPHONE_OS_VERSION_MAX_ALLOWED > __IPHONE_7_1) #define supportsWKWebKit #endif
Then remove the #if #endif pair, just leave the #define supportsWKWebKit bit out. But make sure you are using iphone 7.1 or above or it won't support WKWebkit.
解决原文地址：http://stackoverflow.com/questions/33716725/xcode-linker-error-for-wkwebviewjavascriptbridge