I am studying Creator through the official demo Black Jack Game and met a problem in RankItem.js which is binding with rankItem Prehab.
Here is the codes:

I am curious at this.spRankBG.spriteFrame = this.texRankBG[rank]; . Where is the sprite frame initialized?
I dont’t find any initialize in Prehab or scripts.
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I got the correct result when it runs in browser (rankinglist_1,rankinglist_2,rankinglist_3 images showed correctly)
Who can help me? Thank you very much