- (void)openAppWithIdentifier:(NSString*)appId{ 

 SKStoreProductViewController*storeProductVC =  [[SKStoreProductViewController alloc] init];

 storeProductVC.delegate=self;

 NSDictionary*dict = [NSDictionary dictionaryWithObject:appId forKey:SKStoreProductParameterITunesItemIdentifier];

 [storeProductVC loadProductWithParameters:dictcompletionBlock:^(BOOLresult,NSError*error) {

 if(result) {

  [self presentViewController:storeProductVC animated:YES completion:nil];

 }

}];

}

#pragma mark -协议方法

- (void)productViewControllerDidFinish:(SKStoreProductViewController*)viewController{

 NSLog(@"关闭界面");

 [viewController dismissViewControllerAnimated:YES completion:nil];

}

[self openAppWithIdentifier:@"1212104959"];//AppID可以在iTunesconnect中APP信息里查看。