Undefined symbols for architecture arm64:   "_OBJC_CLASS_$_WKWebpagePreferences", referenced from:       objc-class-ref in libWeChatSDK.a(WapAuthHandler.o)   "___isPlatformVersionAtLeast", referenced from:       -[WXWebViewController viewDidLoad] in libWeChatSDK.a(WapAuthHandler.o) ld: symbol(s) not found for architecture arm64 clang: error: linker command failed with exit code 1 (use -v to see invocation) 我用的是最新1.8.7.1和xocd11.5还是报这个