获取网络时间

- (NSDate *)getInternetDate

{

NSString *urlString = @"http://m.baidu.com";

urlString = [urlString stringByAddingPercentEscapesUsingEncoding: NSUTF8StringEncoding];

// 实例化NSMutableURLRequest，并进行参数配置

NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];

[request setURL:[NSURL URLWithString: urlString]];

[request setCachePolicy:NSURLRequestReloadIgnoringCacheData];

[request setTimeoutInterval: 2];

[request setHTTPShouldHandleCookies:FALSE];

[request setHTTPMethod:@"GET"];

NSHTTPURLResponse *response;

[NSURLConnection sendSynchronousRequest:request

returningResponse:&response error:nil];

// 处理返回的数据

//    NSString *strReturn = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];

NSLog(@"response is %@",response);

NSString *date = [[response allHeaderFields] objectForKey:@"Date"];

date = [date substringFromIndex:5];

date = [date substringToIndex:[date length]-4];

NSDateFormatter *dMatter = [[NSDateFormatter alloc] init];

dMatter.locale = [[NSLocale alloc] initWithLocaleIdentifier:@"en_US"];

[dMatter setDateFormat:@"dd MMM yyyy HH:mm:ss"];

NSDate *netDate = [[dMatter dateFromString:date] dateByAddingTimeInterval:60*60*8];

return netDate;

}