//获取当前时间

NSDate *date=[NSDate date];

//将时间戳转换为NSDate

    NSDate *dateB = [NSDate dateWithTimeIntervalSince1970:[model.liveTime intValue]];

    NSComparisonResultresult = [datecompare:dateB];

    if (result == NSOrderedDescending) {

        //NSLog(@"DateB  is in the future");

    }

    elseif(result ==NSOrderedAscending){

        //NSLog(@"DateB is in the past");

        [_subscribeBtn setHidden:YES];

    }else{

        //NSLog(@"Both dates are the same");

    }