IOS版本更新

-(void)onCheckVersion{    NSDictionary *infoDic = [[NSBundlemainBundle] infoDictionary];    //CFShow((__bridge CFTypeRef)(infoDic));   NSString *currentVersion = [infoDic objectForKey:@"CFBundleVersion"];    //IOS里面的网络请求    NSString *URL =@"http://itunes.apple.com/lookup?id=你的应用程序的ID";    NSMutableURLRequest *request = [[NSMutableURLRequestalloc] init];    [requestsetURL:[NSURLURLWithString:URL]];    [requestsetHTTPMethod:@"POST"];   NSHTTPURLResponse *urlResponse = nil;   NSError *error = nil;   NSData *recervedData = [NSURLConnectionsendSynchronousRequest:request returningResponse:&urlResponse error:&error];      //IOS里面的json解析
    NSString *results = [[NSStringalloc] initWithBytes:[recervedDatabytes] length:[recervedDatalength] encoding:NSUTF8StringEncoding];     NSDictionary *dic = [results JSONValue];   NSArray *infoArray = [dic objectForKey:@"results"];   if ([infoArray count]) {       NSDictionary *releaseInfo = [infoArray objectAtIndex:0];       NSString *lastVersion = [releaseInfo objectForKey:@"version"];               if (![lastVersion isEqualToString:currentVersion]) {            //trackViewURL = [releaseInfo objectForKey:@"trackVireUrl"];            UIAlertView *alert = [[UIAlertViewalloc] initWithTitle:@"更新"message:@"有新的版本更新，是否前往更新？"delegate:selfcancelButtonTitle:@"关闭"otherButtonTitles:@"更新",nil];            alert.tag =10000;            [alertshow];        }       else        {            UIAlertView *alert = [[UIAlertViewalloc] initWithTitle:@"更新"message:@"此版本为最新版本"delegate:selfcancelButtonTitle:@"确定"otherButtonTitles:nil,nil];            alert.tag =10001;            [alertshow];        }    }}
//ios里面回调很多，对话框的就是通过回调- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{   if (alertView.tag==10000) {       if (buttonIndex==1) {            NSURL *url = [NSURLURLWithString:@"https://itunes.apple.com"];            [[UIApplicationsharedApplication]openURL:url];        }    }}