ios 以编程方式设置 NSIndexPath
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Set NSIndexPath programmatically
提问by Matrosov Alexander
My question is: How to set NSIndexPath programmatically.
我的问题是：如何以编程方式设置 NSIndexPath。
For example I add method:
例如我添加方法：
- (void)setDefaultValue{
tempIndexPath = [NSIndexPath indexPathForRow:0 inSection:1];
}
In tableView delegate -cellForRowAtIndexPathI want to compare two indexPath
在 tableView 委托-cellForRowAtIndexPath我想比较两个 indexPath
if([indexPath isEqual:tempIndexPath]) ...
if([indexPath isEqual:tempIndexPath]) ...
But in this case my tempIndexPath = null (i think - because this is autorelease object)
但在这种情况下，我的 tempIndexPath = null （我认为 - 因为这是自动释放对象）
How to set NSIndexPath in this case?
在这种情况下如何设置 NSIndexPath？
Thanks, All!
谢谢大家！
回答by LuisEspinoza
Add retain
添加保留
- (void)setDefaultValue{
tempIndexPath = [[NSIndexPath indexPathForRow:0 inSection:1] retain];
}
But you have to be aware of release temIndexPath in the future.
但是您必须注意将来发布 temIndexPath。
EDIT:I deleted bad option.
编辑：我删除了错误的选项。
回答by Manlio
Simply call retainafter you instantiated it:
retain实例化后只需调用：
[tempIndexPath retain];
This will make you the owner of the object, so remember to releaseit when you have done.
这将使您成为对象的所有者，因此请在release完成后记住它。
回答by Alexander
You have to allocate it and release it afterwards, defining it the way you did is returning an autoreleased object.
你必须分配它然后释放它，定义它的方式是返回一个自动释放的对象。
