- (void) alertWithTitle: (NSString *)_title_  msg:(NSString *)msg delegate:(id)_delegate cancelButtonTitle:(NSString*)_cancelTitle otherButtonTitles:(NSString*)_otherTitles{

     UIAlertView *alert = [[UIAlertView alloc] initWithTitle:_title_

                                                     message:msg

                                                    delegate:_delegate

                                           cancelButtonTitle:_cancelTitle

                                           otherButtonTitles:_otherTitles,nil];

     [alert show];

 }

 #pragma mark - update

 -(void)checkUpdate{

     MBKAppDelegate *mbkApp = (MBKAppDelegate *)[[UIApplication sharedApplication] delegate];

     if (![mbkApp networkIsReach]) {

         return;

     }

     NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"http://itunes.apple.com/lookup?id=%@",kAppId]];

     ASIHTTPRequest *request =[ASIHTTPRequest requestWithURL:url];

     [request setDelegate:self];

     [request setDidFinishSelector:@selector(requestDone:)];

     [request setDidFailSelector:@selector(requestWentWrong:)];

     [request startSynchronous];

 }

 #pragma mark - asihttprequest

 - (void)requestDone:(ASIHTTPRequest *)request

 {

     NSError *err = nil;

     NSDictionary *dictionary =

     [[CJSONDeserializer deserializer] deserializeAsDictionary:[request responseData] error:&err];

     if (err != nil) {

         [self failure];

         return;

     }

     NSArray *a = [dictionary objectForKey:@"results"];

     if (a.count == ) {

         [self failure];

         return;

     }

     NSDictionary *d = [a objectAtIndex:];

     NSString *newVersion = [d objectForKey:@"version"];

     NSDictionary *infoDict = [[NSBundle mainBundle] infoDictionary];

     NSString *nowVersion = [infoDict objectForKey:@"CFBundleVersion"];

     NSString *msg = @"";

     NSString *cancelTitle = @"";

     NSString *otherTitles = @"";

     if(![nowVersion isEqualToString:newVersion])

     {

         msg = @"版本有更新";

         cancelTitle = @"取消";

         otherTitles = @"更新";

     }else{

         msg = @"已经是最新版本啦";

         cancelTitle = @"好";

         otherTitles = nil;

     }

     [self alertWithTitle:nil msg:msg delegate:self cancelButtonTitle:cancelTitle otherButtonTitles:otherTitles];

 }

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

     if(buttonIndex==){

         NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"https://itunes.apple.com/us/app/qun-xiang-dao/id%@?ls=1&mt=8",kAppId]];

         [[UIApplication sharedApplication]openURL:url];

     }

 }

 - (void)requestWentWrong:(ASIHTTPRequest *)request

 {

     [self failure];

 }

 - (void)failure{

     [self alertWithTitle:nil msg:@"检查失败了" delegate:self cancelButtonTitle:@"好" otherButtonTitles:nil];

 }