修改referrerId

Pod/Classes/UIViewController+Phobos.m

@@ -58,6 +58,10 @@
     objc_setAssociatedObject(self, @selector(inTime), inTime, OBJC_ASSOCIATION_COPY);
 }
 
+
+/**
+    这个地方inTime的值为nil的情况不做考虑,因为Phobos不会发送
+ */
 - (NSString *)inTime {
     NSString *inTime = objc_getAssociatedObject(self, @selector(inTime));
     return inTime;
@@ -68,6 +72,7 @@
 }
 
 - (NSString *)referrerId {
-    return objc_getAssociatedObject(self, @selector(referrerId));
+    NSString *referrerId = objc_getAssociatedObject(self, @selector(referrerId));
+    return referrerId == nil ? @"" : referrerId;
 }
 @end