由于使用WebView，导致Unity SDK Xcode构建失败

Question

我使用Unity SDK来构建具有Branch.io支持的iOS应用。 Xcode构建因错误而失败：

Undefined symbols for architecture arm64:
  "_OBJC_CLASS_$_WKWebView", referenced from:
      objc-class-ref in BNCUserAgentCollector.o
  "_OBJC_CLASS_$_CSSearchableItem", referenced from:
      objc-class-ref in BranchCSSearchableItemAttributeSet.o
  "_OBJC_METACLASS_$_CSSearchableItemAttributeSet", referenced from:
      _OBJC_METACLASS_$_BranchCSSearchableItemAttributeSet in BranchCSSearchableItemAttributeSet.o
  "_OBJC_CLASS_$_CSSearchableIndex", referenced from:
      objc-class-ref in BranchCSSearchableItemAttributeSet.o
  "_OBJC_CLASS_$_CSSearchableItemAttributeSet", referenced from:
      _OBJC_CLASS_$_BranchCSSearchableItemAttributeSet in BranchCSSearchableItemAttributeSet.o
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Apple最近不推荐使用WebView。