IOS checks the new version of the App and updates the new version. ios checks the new version of the app.

IOS checks the new version of the App and updates the new version. ios checks the new version of the app.

Check for new version updates

# Define kStoreAppId @ "xxxxxxxxx" // (appid digital string)/*** check the id of the new version update @ "1081299902" app */-(void) checkAppUpdate {NSDictionary * infoDict = [[NSBundle mainBundle] infoDictionary]; NSString * nowVersion = [infoDict objectForKey: @ "CFBundleVersion"]; NSURL * url = [NSURL encoding: [NSString encoding: @ "http://itunes.apple.com/lookup? Id = % @ ", @" "]; // @" "contains appId For example: @" 1081408739 "NSString * file = [NSString stringWithContentsOfURL: url encoding: NSUTF8StringEncoding error: nil]; nsange substr = [file rangeOfString: @ "\" version \ ": \" "]; nsange range1 = NSMakeRange (substr. location + substr. length, 10); // nsange substr2 = [file rangeOfString: @ "\" "options: nil range: range1]; nsange substr2 = [file rangeOfString: @ "\" "options: NSCaseInsens ItiveSearch range: range1]; nsange range2 = NSMakeRange (substr. location + substr. length, substr2.location-substr. location-substr.length); NSString * newVersion = [file substringWithRange: range2]; if (! [NowVersion isEqualToString: newVersion]) {UIAlertView * alert = [[UIAlertView alloc] initWithTitle: nil message: @ "a new version is available ~~ "Delegate: self cancelButtonTitle: @" cancel "otherButtonTitles: @" going to update ", nil]; [alert show] ;}}-(void) alertView :( UIAlertView *) alertView clickedButtonAtIndex :( NSInteger) buttonIndex {if (buttonIndex = 1) {// Add the address of the application to the app store to facilitate updates. One method is as follows: NSURL * url = [NSURL URLWithString: [NSString stringWithFormat: @ "https://itunes.apple.com/us/app/id%? Ls = 1 & mt = 8 ", @" "]; // @" "contains appId For example: @" 1081408739 "[[UIApplication sharedApplication] openURL: url] ;}}View Code