编辑对象的值并复制它

发布于 2024-11-25 10:03:03 字数 561 浏览 1 评论 0原文

我有一个事件对象，如下所示，

NSString *name;
NSString *date;
NSInteger id;

我将事件对象存储在 NSMutabelArray 中。我想添加日期并存储在不同的数组中。为此，我使用下面的代码

NSString *curDate = event.Date;
NSDate *date = [dateFormat dateFromString:curDate];
for(int i=0;i<5;i++)
{
  Events *newEvent = event;
  NSDate *newDate = [date dateByAddingTimeInterval:60*60*24*1];
  newEvent.date = [dateFormat stringFromDate:newDate];
  [deleg.events addObject:newEvent];
  date = newDate;
}

，因此在循环的最终迭代之后，deleg.events 中的所有对象都具有最后计算的日期。我该如何解决呢。谢谢

原文

I have an events object which is given below

NSString *name;
NSString *date;
NSInteger id;

I am storing the events object in a NSMutabelArray. I want to add to the date and store in a different array. For that I am using the code below

NSString *curDate = event.Date;
NSDate *date = [dateFormat dateFromString:curDate];
for(int i=0;i<5;i++)
{
  Events *newEvent = event;
  NSDate *newDate = [date dateByAddingTimeInterval:60*60*24*1];
  newEvent.date = [dateFormat stringFromDate:newDate];
  [deleg.events addObject:newEvent];
  date = newDate;
}

So after final iteration of loop all the objects in deleg.events is having the last calculated date. How can I resolve it.
Thanks

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新人笑 2024-12-02 10:03:03

您没有举办新活动。您的行

Events *newEvent = event;

只是创建一个引用完全相同的事件对象的新变量，这意味着您现在已将完全相同的对象添加到数组中 5 次。

我不知道你的 Events 类是如何工作的。如果它符合 NSCopying，那么您可以使用

Events *newEvent = [[event copy] autorelease];

如果不符合，则必须创建一个全新的 Events 对象（使用 [[Events alloc] init] 或其他适合该类）并用适当的数据填充它。

You're not making a new event. Your line

Events *newEvent = event;

is just creating a new variable that references the exact same event object, which means you now have added the exact same object to the array 5 times.

I don't know how your Events class works. If it conforms to NSCopying, then you can use

Events *newEvent = [[event copy] autorelease];

If not, you'll have to create a brand new Events object (using [[Events alloc] init] or whatever is appropriate for the class) and populate it with the appropriate data.

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