Jump from app to AppStore comment page implementation

If you want to implement within the app to jump to AppStore's corresponding comment page inside, as long as the following address in the app_id to replace their own ID on it, the other places do not have to tube.
If you want to experiment with the Safari browser, you can replace the "itms-apps://" in the Address with "http://".
Alternatively, you can try to change the values of several of these parameters to see the results.
Note: You must use real-machine debugging, which is not currently supported by the emulator

NSString * appstoreurlstring = @ "itms-apps://ax.itunes.apple.com/webobjects/mzstore.woa/wa/ Viewcontentsuserreviews?mt=8&onlylatestversion=true&pagenumber=0&sortordering=1&type=purple+ software&id=app_id ";  
     
    nsurl * url = [Nsurl urlwithstring:appstoreurlstring]; 
     
    if ([[ UIApplication Sharedapplication] canopenurl:url])  
    { 
         [[UIApplication sharedapplication] openurl:url]; 
   } 
     else 
    { 
        NSLog (@ "can Not open ");  
   }