如何点击链接直接跳转到app store指定应用下载页面

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

其中，436957167是appid

附：跳转到评价页面：

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1. NSString *str = [NSString stringWithFormat:    
2.                          @"itms-apps://ax.itunes.apple.com/WebObjects/MZStore.woa/wa/viewContentsUserReviews?type=Purple+Software&id=%d",    
3.                          436957167 ];    
4. [[UIApplication sharedApplication] openURL:[NSURL urlWithString:str]];