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plurals

POCorrectly handle didReceiveMemoryWarning
primarykey
Id
10429235
data
AcceptedAnswerId
10483256
AnswerCount
2
ClosedDate
CommentCount
20
CommunityOwnedDate
CreationDate
2012-05-03T10:08:33.147
FavoriteCount
0
LastActivityDate
2012-05-07T14:10:31.183
LastEditDate
2012-05-05T03:24:03.383
LastEditorUserId
108574
OwnerUserId
108574
ParentId
0
PostTypeId
1
Score
2
ViewCount
5705
LastEditorDisplayName
text
Body
One of my <code>UIViewController</code> has several child view controllers. They are built inside the interface builder, by dragging an <code>NSObject</code> to the "Objects" section at left, then put in my own <code>SpecialViewController</code> as "Custom Class". With this setup, upon <code>viewDidLoad</code> I'll have my views and the controller ready. The workflow is suggested by the following screenshot: <img src="https://i.stack.imgur.com/pfc7v.png" alt="Drag "Object" to create instance"> And in my implementation, I have: <pre><code>@interface ParentController : UIViewController { SpecialViewController *svc; } @property (nonatomic, retain) IBOutlet SpecialViewController *svc; </code></pre> As I understand that during <code>didReceiveMemoryWarning</code> I should release my own resources. Then set <code>IBOutlets</code> to nil during <code>viewDidUnload</code>. I get crashes when simulating low memory in the simulator, with debugger pausing at <code>didReceiveMemoryWarning</code> of <code>SpecialViewController</code> (whose body is just <code>[super didReceiveMemoryWarning];</code>), with error <code>EXC_BAD_ACCESS (code=1, address=0xe0000008)</code>. At this time, the parent controller isn't visible, so it can be safely released. Parent controller also contains only <code>[super didReceiveMemoryWarning];</code> in <code>didReceiveMemoryWarning</code>. I've tried niling <code>IBOutlets</code> in both classes. It didn't help. Any idea why this happened? I'm targeting iOS 4 & 5 with ARC. <code>SpecialViewController</code> is a subclass of <code>UITableViewController</code>. Through tracing, I found that <code>ParentController didReceiveMemoryWarning</code> is called before <code>SpecialViewController</code>.
Tags
<iphone><objective-c><ios><cocoa-touch><memory-management>
Title
Correctly handle didReceiveMemoryWarning
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PostAcceptedAnswerId
1. PO
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1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
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1. USHe Shiming
UserOwnerUserId
1. USHe Shiming
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1. PO
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 PTAnswer
2. PO
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1. VO
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 POCorrectly handle didReceiveMemoryWarning
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 POCorrectly handle didReceiveMemoryWarning
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 POCorrectly handle didReceiveMemoryWarning
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