App内打开App Store

完成该功能需要使用SKStoreProductViewController，只支持iOS 6，直接看代码吧。

if(NSClassFromString(@"SKStoreProductViewController")) { // Checks for iOS 6 feature.

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

        storeController.delegate = delegate; // productViewControllerDidFinish

        NSDictionary *productParameters = @{ SKStoreProductParameterITunesItemIdentifier : appID};

        [storeController loadProductWithParameters:productParameters completionBlock:nil];

        [controller presentViewController:storeController animated:YES completion:nil];

    }

    else { // Before iOS 6, we can only open the URL        

        [[UIApplication sharedApplication] openURL:[NSURL URLWithString:url]];

    }

还需要实现一个代理方法

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

    [viewController dismissModalViewControllerAnimated:YES];

}

如果直接跳转某个app的评论，可使用如下地址（把xxx替换为正确的app id即可）

itms-apps://ax.itunes.apple.com/WebObjects/MZStore.woa/wa/viewContentsUserReviews?type=Purple+Software&id=xxx