iOS 版本更新

1. 获取本机版本号

NSDictionary *localDic = [[NSBundle mainBundle] infoDictionary];
NSString *localVersions = [localDic objectForKey:@"CFBundleShortVersionString"];

2. 查看appstore中的软件最新版本

地址：https://itunes.apple.com/lookup?id=软件的apple Id

NSArray *resultArr = responseObject[@"results"];
NSDictionary *resultDic = resultArr.firstObject;
NSString *latestVersion = resultDic[@"version"];

3. 如果版本不一致，进行更新

if ([latestVersion compare:localVersions options:NSNumericSearch] == NSOrderedDescending) {
[self updateBtnActionwithLatestVersion:latestVersion];
}

• (void)updateBtnActionwithLatestVersion:(NSString *)latestVersion {
  UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"检查到最新版本" message:latestVersion preferredStyle:UIAlertControllerStyleAlert];
  UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {

  }];
  UIAlertAction *updateAction = [UIAlertAction actionWithTitle:@"下载" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
  UIApplication *application = [UIApplication sharedApplication];
  [application openURL:[NSURL URLWithString:@"https://itunes.apple.com/cn/app/id软件的Apple id"]];
  }];
  [alertController addAction:cancelAction];
  [alertController addAction:updateAction];
  [self presentViewController:alertController animated:YES completion:nil];
  }