CCLabelTTF : will become a white rectangle

If you want invoke cocos2d-x function from a thread,It may be Crash.

     I am working on a network game using cocos2dx with libcurl.

      I created a CCLabelTTF on a CCLayer object.

       Then I made a thread to request my java server using curl.

     when a get response from the thread, I want to print a string on the CCLabelTTF.

     I call setString , finally it become a white rectangle.

      And I found that will only happen when I call it from a thread。

    1、    We can not invoke any cocos2d-x function or from a thread.

     It is not thread-safe. 

    2、 every thread has its own openGL context  if you add a texture in a thread which is not cocos2d-x's GLThread,

cocos2d-x won't get that texture because that texture belongs another thread.

So。。。

  在线程中调用cocos2d-x 方法可能会导致程序没有规律的崩溃。 

 这次因为我在线程中调用了CCLabelTTF 的 setString() 导致了 变成了 白色的矩形。

 

 

get more :

http://www.cocos2d-x.org/boards/6/topics/9258