objc_setAssociatedObject(bayButt, @"addShopCarBySku",skuId, OBJC_ASSOCIATION_RETAIN);
id obj = objc_getAssociatedObject(butt, @"addShopCarBySku");
objc_setAssociatedObject(bayButt, @"addShopCarBySku",skuId, OBJC_ASSOCIATION_RETAIN);
id obj = objc_getAssociatedObject(butt, @"addShopCarBySku");

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