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POObjective C Object Not Updating
 

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  1. POObjective C Object Not Updating
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    <p>I am using ARC, XCode 4.2, OS X 10.6, and building for the iPad 5.0 Simulator (each object is displayed in a table view cell).</p> <hr> <p>I have an NSArray of objects that have the following properties:</p> <pre><code>// Relevant ModelClass.h @property (strong, nonatomic) ChildObject* childObject; @property Boolean type1; @property Boolean type2; // Relevant ChildObject.h @property (strong, nonatomic) NSString* name; </code></pre> <p>I am trying to ensure that each instance of ChildObject (always a property of the ModelObject) has a name set for display. I am using the following code to accomplish this:</p> <pre><code>// Called after the objects are all loaded into the objects NSArray // _data is an NSMutableArray that is allocated and initialized // Loop through the model array and make sure that everyone has a name set for (ModelClass *model in objects) { NSLog(@"B %@", [[model childObject] name]); if (model.num == 0) { if (model.type1) { [model.childObject setName: @"type1"]; NSLog(@"Updated Name: %@", model.childObject.name); } else { model.childObject.name = @"type2"; } } if (! model.childObject.name) { [model.childObject setName:@"?"]; } [_data addObject:model]; NSLog(@"E %@", [[model childObject] name]); } </code></pre> <p>The <code>objects</code> array has two objects: one with a name, and one without (and the boolean value for type1 set to true).</p> <p>However, when the code executes, the log looks like this:</p> <pre><code>// Log Output 2012-07-18 10:40:27.760 AppName[13462:40b] B A Really Long Name 2012-07-18 10:40:27.760 AppName[13462:40b] E A Really Long Name 2012-07-18 10:40:27.760 AppName[13462:40b] B (null) 2012-07-18 10:40:27.761 AppName[13462:40b] Updated Name: (null) 2012-07-18 10:40:27.761 AppName[13462:40b] E (null) </code></pre> <p>The first three lines are correct (first object's name not changed, second object with name set to <code>null</code>). For some reason, the name of the second object is not updated, even though it appears that the code is executing to change its name.</p> <p>Why doesn't the object's name update? I am new to Objective-C, so it may be something really simple.</p>
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    1. PO
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      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USkeyboarddrummer
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
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      1. PTAnswer
    1. VO
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      1. POObjective C Object Not Updating
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
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      1. POObjective C Object Not Updating
      1. This table or related slice is empty.
      1. VTUpMod
    1. COCan we see your "setName" method please. You could be sending the message incorrectly.
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      1. POObjective C Object Not Updating
      1. USMrHappyAsthma
    2. COI'd be suspicious that `model.childObject` is null for your second `model`. Can you log it to verify?
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      1. POObjective C Object Not Updating
      1. USPhillip Mills
    3. CO@MrHappyAsthma - the setters/getters are synthesized
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      1. POObjective C Object Not Updating
      1. USkeyboarddrummer
 

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