我有一个'while‘循环,它检查Firebase的菜单上的一些价格。对于每一项,它转到一个特定的ref URL并获取该菜的价格,然后将其值提交给一个数组,以便在表上显示。while i < self.itemNames.count { snapshot in
self.itemPrices.append(snaps
[queue addOperation:operation];}
2012-11-23 11:30:14.202 StoreSearch[5803:c07] *** WebKit discarded an uncaughtaddOperation:]: operation is finished and cannot be