expected identifier or "("该怎么解决

expected identifier or "("

@interface Logger : NSObject

typedef enum {
    kTrace=0, kDebug=1, kInfo=2, kWarn=3, kError=4, KSilent=5
} LoggerLevel;
{  //此处报错:Expected identifier or "("
LoggerLevel logThreshold;
BOOL async;
BOOL colorEnabled;

}
@end