使用SKStoreProductViewController显示Appstore内App详情(iOS6)

=== 使用SKStoreProductViewController显示Appstore内App详情(iOS6)

iOS新增了一个StoreKit，其中提供了一个可以在程序内显示Appstore中的App详情界面的ViewController。对于推荐自家应用非常友好，可以在这个界面直接点击下载，不需要再跳到Appstore了。

``` - (void)presentAppStoreForID:(NSNumber )appStoreID inView:(UIView )view withDelegate: (id)delegate withURL:(NSURL *)appStoreURL {

if(NSClassFromString(@"SKStoreProductViewController"))
{

    SKStoreProductViewController *storeController = [[SKStoreProductViewController alloc] init];
    storeController.delegate = delegate;

    NSDictionary *productParameters = @{ SKStoreProductParameterITunesItemIdentifier : appStoreID };


    [storeController loadProductWithParameters:productParameters completionBlock:^(BOOL result, NSError *error)
     {
         if (result)
         {
             [self presentViewController:storeController animated:YES completion:nil];
         }
         else
         {
             //Warning
         }
     }];
}
else
{
    [[UIApplication sharedApplication] openURL:appStoreURL];
}

} ```