1

  // App内部打开AppStore 应用页面
  SKStoreProductViewController*storeProductVC =  [[SKStoreProductViewController alloc] init];
  //storeProductVC.delegate=self;
  NSDictionary*dict = [NSDictionary dictionaryWithObject:@"1212685856" forKey:SKStoreProductParameterITunesItemIdentifier];
  [storeProductVC loadProductWithParameters:dict completionBlock:^(BOOL result,NSError*error) {
      if(result) {
          [self presentViewController:storeProductVC animated:YES completion:nil];
      }
  }];

delegate

// 点击取消后
- (void)productViewControllerDidFinish:(SKStoreProductViewController *)viewController
{
    [viewController dismissViewControllerAnimated:YES completion:nil];
}