iOS开发中，应用内直接跳转到Appstore

//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

//2.进入首页
NSString *str = [NSString stringWithFormat: @"itms-apps://itunes.apple.com/WebObjects/MZStore.woa/wa/viewSoftware?id=%@",m_myAppID ];  
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:str]];

//三、进入appstory评分 

NSString *str = [NSString stringWithFormat: @"itms-apps://ax.itunes.apple.com/WebObjects/MZStore.woa     /wa/viewContentsUserReviews?type=Purple+Software&id=%d", APPID/*此处的appID是在iTunes Connect建立应用程序时生成的Apple ID*/ ];

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