Objective c 获取错误："；架构x86“U 64”的未定义符号；在使用CocoaLumberjack框架时

我已经在现有项目中使用cocoapods安装了cocoaLumberjack框架

# Uncomment the next line to define a global platform for your project
platform :ios, '12.0'

def shared_pods
  pod 'CocoaLumberjack'
end

target 'ABC' do
  shared_pods
end

通过上述pod实现成功安装了框架

我在我的

prefix.pch

文件中添加了以下内容

#define LOG_LEVEL_DEF ddLogLevel
#import <CocoaLumberjack/CocoaLumberjack.h>

static DDLogLevel ddLogLevel = DDLogLevelDebug;

如果我尝试在我的模拟器中运行项目，在实现了这个之后，我会得到以下错误

Undefined symbols for architecture x86_64:
      "_OBJC_CLASS_$_DDLog", referenced from:
          objc-class-ref in AppDelegate.o
      "_OBJC_CLASS_$_DDFileLogger", referenced from:
          objc-class-ref in AppDelegate.o
    ld: symbol(s) not found for architecture x86_64
    clang: error: linker command failed with exit code 1 (use -v to see invocation)

---

您是否尝试将代码从

prefix.pch

移动到任何其他头文件？

Undefined symbols for architecture x86_64:
      "_OBJC_CLASS_$_DDLog", referenced from:
          objc-class-ref in AppDelegate.o
      "_OBJC_CLASS_$_DDFileLogger", referenced from:
          objc-class-ref in AppDelegate.o
    ld: symbol(s) not found for architecture x86_64
    clang: error: linker command failed with exit code 1 (use -v to see invocation)