Doh！我没有将我的新应用购买产品ID传递给以下内容，因此Apple没有找到他们返回详细信息：
[[SKProductsRequest alloc] initWithProductIdentifiers：_productIdentifiers];

Doh! I wasnt passing in my new in app purchase product ids into the following, so Apple wasnt looking for them to return the details: [[SKProductsRequest alloc] initWithProductIdentifiers:_productIdentifiers];

希望这个答案可能在将来帮助其他人。刚刚用完一张年度Apple门票来回答这个问题。

Hopefully this answer might help someone else in the future. Just used up one of my annual Apple tickets to answer this.