bugfix

GMPhobos/Classes/PhobosDevice.m

@@ -34,7 +34,7 @@ NSString *defaultIDFA = @"00000000-0000-0000-0000-000000000000";
         //如果获取到存储到钥匙串中
         [self saveKeyChainWithValue:keyChainIDFA service:IDFA account:keyChainAccount];
     }
-    if (!keyChainIDFA) {
+    if ([self checkIdfaIsNull:keyChainIDFA]) {
         keyChainIDFA = defaultIDFA;
     }
     return keyChainIDFA;