1.一定要先配置自己项目在商店的APPID(从苹果开发者中心登录自己的账号可看),配置完最好在真机上运行才能看到完全效果哦!

define STOREAPPID @"1104867082" // 宏定义APPID

/**

• 天朝专用检测app更新
  一句代码实现检测更新,很简单哦 （需要在viewDidAppear完成时，再调用改方法。不然 在网速飞快的时候，会出现一个bug，就是当前控制器viewDidLoad调用的话，可能当前视 图还没加载完毕就需要推出UIAlertAction）
  */
  -(void)hsUpdateApp
  {
  //2先获取当前工程项目版本号
  NSDictionary *infoDic=[[NSBundle mainBundle] infoDictionary];
  NSString *currentVersion=infoDic[@"CFBundleShortVersionString"];

  //3从网络获取appStore版本号
  NSError *error;
  NSData *response = [NSURLConnection sendSynchronousRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:[NSString stringWithFormat:@"http://itunes.apple.com/cn/lookup?id=%@",STOREAPPID]]] returningResponse:nil error:nil];
  if (response == nil) {
  NSLog(@"你没有连接网络哦");
  return;
  }
  NSDictionary *appInfoDic = [NSJSONSerialization JSONObjectWithData:response options:NSJSONReadingMutableLeaves error:&error];
  if (error) {
  NSLog(@"hsUpdateAppError:%@",error);
  return;
  }
  // NSLog(@"%@",appInfoDic);
  NSArray *array = appInfoDic[@"results"];
  NSDictionary *dic = array[0];
  NSString *appStoreVersion = dic[@"version"];
  //打印版本号
  NSLog(@"当前版本号:%@\n商店版本号:%@",currentVersion,appStoreVersion);
  //设置版本号
  currentVersion = [currentVersion stringByReplacingOccurrencesOfString:@"." withString:@""];
  if (currentVersion.length==2) {
  currentVersion = [currentVersion stringByAppendingString:@"0"];
  }else if (currentVersion.length==1){
  currentVersion = [currentVersion stringByAppendingString:@"00"];
  }
  appStoreVersion = [appStoreVersion stringByReplacingOccurrencesOfString:@"." withString:@""];
  if (appStoreVersion.length==2) {
  appStoreVersion = [appStoreVersion stringByAppendingString:@"0"];
  }else if (appStoreVersion.length==1){
  appStoreVersion = [appStoreVersion stringByAppendingString:@"00"];
  }

  //4当前版本号小于商店版本号,就更新
  if([currentVersion floatValue] < [appStoreVersion floatValue])
  {
  UIAlertController *alercConteoller = [UIAlertController alertControllerWithTitle:@"版本有更新" message:[NSString stringWithFormat:@"检测到新版本(%@),是否更新?",dic[@"version"]] preferredStyle:UIAlertControllerStyleAlert];
  UIAlertAction *actionYes = [UIAlertAction actionWithTitle:@"更新" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
  //此处加入应用在app store的地址，方便用户去更新，一种实现方式如下
  NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"https://itunes.apple.com/us/app/id%@?ls=1&mt=8", STOREAPPID]];
  [[UIApplication sharedApplication] openURL:url];
  }];
  UIAlertAction *actionNo = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {

  }];
  [alercConteoller addAction:actionYes];
  [alercConteoller addAction:actionNo];
  [self presentViewController:alercConteoller animated:YES completion:nil];
  

  }else{
  NSLog(@"版本号好像比商店大噢!检测到不需要更新");
  }

}