1.进入appstore中指定的应用

NSString *str = [NSString stringWithFormat: 

                         @"itms-apps://ax.itunes.apple.com/WebObjects/MZStore.woa /wa/viewContentsUserReviews?type=Purple+Software&id=%d", 

                         myAppID ];  



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



        其中myAppID为itunesconnect中的应用程序id