如何点击链接直接跳转到app store指定应用下载页面

NSString *str = [NSString stringWithFormat:@"http://itunes.apple/us/app/id%d", 436957167];
[[UIApplication sharedApplication] openURL:[NSURL urlWithString:str]];

其中，436957167是appid

附：跳转到评价页面：

NSString *str = [NSString stringWithFormat:  
                         @"itms-apps://ax.itunes.apple/WebObjects/MZStore.woa/wa/viewContentsUserReviews?type=Purple+Software&id=%d",  
                         436957167 ];  
[[UIApplication sharedApplication] openURL:[NSURL urlWithString:str]];