很急！pod EaseMobSDKFull 提示 错误

ld: warning: directory not found for option '-L/Users/hushuangfei/Desktop/BottleChat/EaseMobSDK/lib'
Undefined symbols for architecture x86_64:
  "_OBJC_CLASS_$_EaseMob", 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)

请问这是什么原因！！！！。
而且我在- (BOOL)application:(UIApplication*)application didFinishLaunchingWithOptions:(NSDictionary*)launchOptions中只要使用
 [[EaseMob sharedInstance] registerSDKWithAppKey:@"" apnsCertName:@""]; 这个方法，就2个报错错误。！