objective c - "Cannot find interface declaration for <class>" -

-

screenshots

i'm having quite hard time setting category on class made. i've read, objective-c allows create category on any class, not closed-source ones. (it wouldn't make sense other way.)

of course can add category messages actual class file, want keep them separate (as category uncommonly special use of class can used generally). want share class, keep category private... anyway.

i've stripped down category show issue @ hand. (currently) 4 errors on first category message. number of errors receive on line directly proportional how many times references, not rise. know causing this?

your resources.h file, imported bytecollection.h, imports bytecollection+words.h. when bytecollection+words.h imports bytecollection.h, results in circular dependency†. simplest way break circular dependency move 1 of imports implementation file rather header. looks should possible resources.h.

† might wondering, why problem if have circular dependency? well, #import directive literally textually includes file specify, if copy-pasted. intelligently doesn't include file twice, because create duplicate code. means when file says "i want file b go before me" , file b says "i want file go before me," 1 of them going disappointed, , leads errors 1 you're getting here.


Comments

Post a Comment

Popular posts from this blog

django - How can I change user group without delete record -

-
on website user have 1 group. , user can change group. it's made user.groups.clear() and user.groups.add(new_group) but it's not efficient, because there 2 sql query: delete, insert. how can change group update query? user , group related each other using manytomanyfield . means intersection table exists relating both entities, , if don't specify model map (using through attribute) django creates 1 you. looking @ sources django.contrib.auth.models see that's case. fortunatly, can access intermediary model using through attribute of manager (in case, user.groups.through ). can use regular model. example: >>> alice = user.objects.create_user('alice', 'alice@example.com', 'alicepw') >>> employee = group.objects.create(name='employee') >>> manager = group.objects.create(name='manager') >>> alice.groups.add(employee) >>> alice.groups.all() [<group: employee...
Read more

java - Need to add SOAP security token -

-
i need set custom soap header attribute on jax-ws generated webservice client. case webservice calls must go through proxy server requiring specific token (recieved web request header) present in soap request header. e.g.: 1 carserviceservice service = null; 2 service = new carserviceservice(new url(url), new qname(qname); 3 carserviceendpoint port = service.getcarserviceport(); it seems in line 3 wsdl retrieved , call fails due missing security token. 1 point direction on how done? a detailed example has been mentioned here: creating , deploying jax-ws web service on tomcat 6 this article shows how create , use security token .
Read more

java - EclipseLink JPA Object is not a known entity type -

-
i have strange problem eclipselink , object want persist. have 1 object (keypointlistimpl) stores object keypointimpl in list. persisting keypointimpl objects works great if try persist keypointlistimpl object java.lang.illegalargumentexception says object keypointimpl isn't known entity type. here keypointimpl code: @entity @table(name="keypoints") public class keypointimpl implements keypoint { @id @generatedvalue(strategy = generationtype.identity) private int id; @enumerated(enumtype.string) private detectortype keypointtype; private float x; private float y; private float size; private float angle; private float response; private int octave; private int classid; ... } here keypointlistimpl code: @entity @table(name="keypointlists") public class keypointlistimpl implements keypointlist { @id @generatedvalue(strategy = generationtype.identity) private int id; @onetoone(cascade={ca...
Read more