跳转到App Store评分

NSString *str = [NSString stringWithFormat: @"itms-apps://itunes.apple.com/WebObjects/MZStore.woa/wa/viewContentsUserReviews?id=%@&pageNumber=0&sortOrdering=2&type=Purple+Software&mt=8", @"1103134478"];

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