给appstore评分和进入app安装页面代码
// 评分
NSString *str = [NSString stringWithFormat:
@"itms-apps://ax.itunes.apple.com/WebObjects/MZStore.woa/wa/viewContentsUserReviews?type=Purple+Software&id=%@",
@"346703830"];
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:str]];

//软件首页
NSString *str2 = [NSString stringWithFormat:
@"itms-apps://itunes.apple.com/WebObjects/MZStore.woa/wa/viewSoftware?id=%@",
@"346703830"];
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:str2]];