Title17

 SKProductsRequest * productsReq = [[SKProductsRequest alloc] initWithProductIdentifiers:[NSSet setWithObjects:@"tw.pitch.unlimited",@"tw.pitch.30coin",nil]];

//用server取得可用貨號可更為彈性
//指定產品要求的 delegate 對象
productsReq.delegate = self;

要在這一行加入<SKProductsRequestDelegate>

@interface StoreTableViewController ()
<SKProductsRequestDelegate>

然後再新增一行

-(void)productsRequest:(SKProductsRequest *)request didReceiveResponse:(SKProductsResponse *)response{



}