IOS- 1970ms时间计算

//创建时间

NSInteger numTime = [dict[@"createTime"][@"time"] longLongValue]/1000;

NSDate *nowTime = [NSDate dateWithTimeIntervalSince1970:numTime];

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

[dateFormat setDateFormat:@"yyyy-MM-dd HH:mm:ss"];

NSString *dateString = [dateFormat stringFromDate:nowTime];

cd.createTime = dateString;