Databases
StackOverflow2013
Postsdbo
POreturn object from model class
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POreturn object from model class
    primarykey
    data
    text
    <p>I hope I don't get shaved here! I try to call a method within my model-class and return a object to the calling controller.</p> <p>my AppDelegate.h:</p> <pre><code>#import &lt;Cocoa/Cocoa.h&gt; @class ResultItem; @interface AppDelegate : NSObject &lt;NSApplicationDelegate&gt;{ ResultItem *ri; } -(void)calculateResults; @end </code></pre> <p>my AppDelegate.m:</p> <pre><code>#import "AppDelegate.h" #import "ResultItem.h" @implementation AppDelegate //other stuff - (void)calculateResults{ self-&gt;ri = [[ResultItem alloc]init]; //ResultItem is my model [xx calculateUniformDistribution:(double)x1 withxMinus:(double)x2 withxAvg:(double)x3 withCount:(double)numberCounter]; } ... </code></pre> <p>my ResultItem.h</p> <pre><code>#import &lt;Foundation/Foundation.h&gt; @interface ResultItem : NSObject -(NSMutableDictionary *)calculateUniformDistribution:(double)xPlus withxMinus:(double)xMinus withxAvg:(double) xAvg withCount:(int) count; </code></pre> <p>my ResultItem.m</p> <pre><code>#import "ResultItem.h" @implementation ResultItem - (NSMutableDictionary *)calculateUniformDistribution:(double)xPlus withxMinus:(double)xMinus withxAvg:(double)xAvg withCount:(int)count{ NSMutableArray *dimensionRandomArray = [[NSMutableArray alloc] init]; NSMutableDictionary *newResultItem = [[NSMutableDictionary alloc]init]; //calculation loop [newResultItem setValue:[NSNumber numberWithDouble:max] forKey:@"maxValue"]; [newResultItem setValue:[NSNumber numberWithDouble:min] forKey:@"minValue"]; [newResultItem setValue:[NSNumber numberWithDouble:avg] forKey:@"averageValue"]; [newResultItem setValue:dimensionRandomArray forKey:@"randomValueArray"]; return newResultItem; } </code></pre> <p>The ResultItem method is called fine. I want to create a <code>NSMutableDictionary</code> object which I need to handle in my AppDelegate later on.</p> <p>My Question:</p> <ol> <li>How can I access the <code>newResultItem</code> within my <code>AppDelegate</code> method afterwards.</li> <li>I have no idea how to add more values with keys to the <code>newResultItem</code> within my <code>AppDelegate</code> method <code>calculateResults</code>. Can somebody help me with it please?</li> <li>Who is actually the owner of the <code>newResultItem</code> object <code>ResultItem</code> or <code>AppDelegate</code>?</li> <li>Does it looks wrong to setup the code like this. I try to follow the MVC pattern as best as possible.</li> </ol> <p>Please don't beat me up...</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USJFS
    plurals
    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
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. COI think you misunderstood the concept of a model class. Its main use is to encapsulate properties (like xPlus, xMinus...) that you can then access via the appropriate getters/setters. You can then have some more complex computation inside for some properties (for example if you have a class Circle with a radius property, you can set the perimeter property to return PI*radius*2).
      singulars
      1. POreturn object from model class
      1. USKirualex
    2. CO@Kirualex, I' afraid I still have to learn so much. Thanks for the answer. It helped me a lot with understanding the model. So, if I follow you comments right I would need to put the calculation as an additional method in my controller class, right? I like your picture by the way.
      singulars
      1. POreturn object from model class
      1. USJFS
    3. COYou can follow @nanako answer which is basically the model you are trying to implement.I don't think you need to defer your calculation in another class if it's meaningfull for your model though (like the perimeter example in my first comment).
      singulars
      1. POreturn object from model class
      1. USKirualex
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload