给appstore评分跟进入app安装页面代码

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]];