app에서 App Store 실행하기

1. 특정 App 상세설명 화면으로 이동하기

        NSString *myAppID = @"686296101";

        NSString *url = [NSString stringWithFormat: @"itms-apps://ax.itunes.apple.com/WebObjects/MZStore.woa/wa/viewContentsUserReviews?type=Purple+Software&id=%@", myAppID];

        //iOS7 doesn't approve above format so add iOS7 specific format

        if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0) {

            url = [NSString stringWithFormat: @"itms-apps://itunes.apple.com/app/id%@", myAppID];

        }

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