Objective c 找不到id类型的对象

Objective c 找不到id类型的对象,objective-c,snapchat,Objective C,Snapchat,我正在绑定自己的应用程序,当我绑定构建应用程序时,我有一个错误: Severity Code Description Project File Line Suppression State Error property 'timeIntervalSince1970' not found on object of type 'id' SnapchatHax (SnapchatHax\SnapchatHax) C:\re\SnapchatHax-maste

我正在绑定自己的应用程序,当我绑定构建应用程序时,我有一个错误:

Severity    Code    Description Project File    Line    Suppression State
Error       property 'timeIntervalSince1970' not found on object of type 'id'   SnapchatHax (SnapchatHax\SnapchatHax)   C:\re\SnapchatHax-master\SnapchatHax\Snapchat\Internal\SCAPIRequest.m   14  
以下是出现错误的代码:

//  SCAPIRequest.m
//  SnapchatHax
//
//  Created by Alex Nichol on 12/17/13.
//  Copyright (c) 2013 Alex Nichol. All rights reserved.
//

#import "SCAPIRequest.h"

@implementation SCAPIRequest

+ (NSString *)timestampString {\
    NSTimeInterval time = [NSDate date].timeIntervalSince1970;
    return [NSString stringWithFormat:@"%llu", (unsigned long long)round(time * 1000.0)];
}
谢谢大家

原因是

[NSDate date] 
正在返回NSDate类型的对象,并且您已直接从该对象访问了不同类型的timeIntervalSince1970。 使用

希望你的问题能得到解决

谢谢

+(NSString*)timestampString{\
NSTimeInterval value = ((NStimeInterval*)[anArray objectAtIndex:0]).aVariable;