Problem with preloading plist file in Cocos2d-x

Question

I am using Cocos2d-x engine with 3.2 version.

In my splash screen I am prefeching a plist by below line

SpriteFrameCache::getInstance()->addSpriteFramesWithFile("ui.plist");

Now inside game when I am creating a sprite I am getting an assert fail error

Sprite *ss = Sprite::createWithSpriteFrameName("pause.png");

Assert failed: Invalid spriteFrameName: pause.png

Also when the splash screen is removed, I am getting the below line in console

cocos2d: TextureCache: removing unused texture: D:/cocos2dx/projects/ABCD/Resources/mid/ui.png

Is there anything I need to add or something?
I was doing the same thing for 2.x and was working but not in 3.2

EDIT: In 3.x if you are calling this line Director::getInstance()->purgeCachedData();, remember that it will delete all textures from the cache memory. So handle all sprite-sheets manually.

Answer 1

Do you have a SpriteBatchNode object added to the scene? According to the cocos2d-x wiki:

A SpriteBatchNode object contains the actual image texture of all the sprite frames. You must add it to a scene, even though it won’t draw anything itself; it just needs to be there so that it is part of the rendering pipeline. For example:

SpriteBatchNode* spritebatch = SpriteBatchNode::create("animations/grossini.png");

Next, you need to use the SpriteFrameCache singleton to keep track how frame names correspond to frame bounds – that is, what rectangular area of the sprite sheet. Example:

SpriteFrameCache* cache = SpriteFrameCache::getInstance();
cache->addSpriteFramesWithFile("animations/grossini.plist");

Once your sprite sheet and frames are loaded, and the sprite sheet has been added to the scene, you can create sprites that use these frames by using the createWithSpriteFrameName method, and adding it as a child of the sprite sheet:

m_pSprite1 = Sprite::createWithSpriteFrameName("grossini_dance_01.png");
spritebatch->addChild(m_pSprite1);
addChild(spritebatch);

If I use "createWithSpriteFrameName("sample.png")" my app crashes. But if I use "initWithSpriteFrameName("sample.png")" the app runs perfectly, I tested this just now before writing this. And I also call addSpriteFramesWithFile from every scene to deal with the unloading.