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POChanging a UIImageView's .image from another ViewController class
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Id
8665489
data
AcceptedAnswerId
8678970
AnswerCount
4
ClosedDate
CommentCount
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CommunityOwnedDate
CreationDate
2011-12-29T08:26:41.060
FavoriteCount
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LastActivityDate
2012-02-10T05:25:01.473
LastEditDate
2011-12-30T11:21:10.377
LastEditorUserId
1018441
OwnerUserId
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PostTypeId
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Score
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ViewCount
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LastEditorDisplayName
text
Body
I have a <code>ViewController</code> which has an embedded <code>UIImageView</code>. Another <code>ViewController</code> has a button which should change the <code>UIImageView's</code> <code>.image</code> by click. What is the best way to achieve this? I've read something about a singleton class but: <ul> <li>I'm not quite sure if I get the point of a <code>singleton class</code> correctly, maybe so. could explain it to me in easy words?</li> <li>There is a way using the <code>AppDelegate</code> ... but I think that's not the best solution.</li> </ul> Thank you. UPDATE: Ich want to call the <code>setUpExternalDisplay</code>-method (which uses instance variables) in <code>FirstAssistantViewController</code>. My Code: <code>FirstAssistantViewController.h</code> <pre><code>#import <UIKit/UIKit.h> #import "DetailTableViewController.h" @interface FirstAssistantViewController : UIViewController <DetailTableViewControllerDelegate> { DetailTableViewController * detailTableViewController; } </code></pre> <code>DetailTableViewController.h</code> <pre><code>#import "AssistantRootViewController.h" #import "FirstAssistantViewController.h" @protocol DetailTableViewControllerDelegate - (void) setUpExternalDisplay; @end @interface DetailTableViewController : UITableViewController <UISplitViewControllerDelegate, UIActionSheetDelegate, DetailTableViewControllerDelegate> { id <DetailTableViewControllerDelegate> delegate; } - (void)showModalHelpViewController; - (void)showModalAssistantViewController; @end </code></pre> UPDATE 2: It now does the following error messages: <code>Cannot find protocol declaration for 'DetailTableViewControllerDelegate'; did you mean 'UIPageViewControllerDelegate'?</code> <code>Property 'DTVCdelegate' requires method 'DTVCdelegate' to be defined - use @synthesize, @dynamic or provide a method implementation</code> If I <code>@synthesize</code>: <code>Existing ivar 'DTVCdelegate' for unsafe_unretained property 'DTVCdelegate' must be __unsafe_unretained</code> Don't know how to solve it.
Tags
<ios><xcode><uiviewcontroller><singleton>
Title
Changing a UIImageView's .image from another ViewController class
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