更新版本

- (void)versionUpdate{

//获得当前发布的版本

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT,0), ^{

//耗时的操作---获取某个应用在AppStore上的信息，更改id就行

NSString *string = [NSStringstringWithContentsOfURL:[NSURLURLWithString:@"http://itunes.apple.com/lookup?id=你的APP的id"]

encoding:NSUTF8StringEncodingerror:nil];

NSData *data = [stringdataUsingEncoding:NSUTF8StringEncoding];

NSDictionary *dic = [NSJSONSerializationJSONObjectWithData:dataoptions:NSJSONReadingMutableLeaveserror:nil];

//获得上线版本号

NSString *version = [[[dicobjectForKey:@"results"]firstObject]objectForKey:@"version"];

NSString *updateInfo = [[[dicobjectForKey:@"results"]firstObject]objectForKey:@"releaseNotes"];

//获得当前版本

NSString *currentVersion = [[[NSBundlemainBundle]infoDictionary]objectForKey:@"CFBundleShortVersionString"];

dispatch_async(dispatch_get_main_queue(), ^{

//更新界面

if ( version &&![versionisEqualToString:currentVersion]) {

//有新版本

NSString *message = [NSStringstringWithFormat:@"有新版本发布啦!\n%@",updateInfo];

UIAlertView *alertView = [[UIAlertViewalloc]initWithTitle:@"温馨提示"message:messagedelegate:selfcancelButtonTitle:@"忽略"otherButtonTitles:@"前往更新",nil];

//此种写法文字会居中显示，这样视觉效果很不好，下列demo中已经解决将alertview上的文字具有显示 先关文章链接http://blog.csdn.net/bddzzw/article/details/52169261

[alertViewshow];

}else{

//已是最高版本

NSLog(@"已经是最高版本");

}

});

});

}

/*根据被点击按钮的索引处理点击事件--当被按钮被点击了这里做出一个反馈*/

-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex

{

if (buttonIndex ==1) {

NSString *url =@"你的APP在APPstore的网址";//

https://itunes.apple.com/cn/app/qq/id444934666?mt=8 QQ在APPstore的网址

[[UIApplicationsharedApplication]openURL:[NSURLURLWithString:url]];

}

}