Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>You need to implement the indexed array accessors as defined in the <a href="https://developer.apple.com/library/ios/documentation/Cocoa/Conceptual/KeyValueCoding/Articles/Compliant.html" rel="nofollow noreferrer">KVC programming guide</a>. Then you must use those accessors to access the array and the KVO triggering will work. You can also call <a href="http://developer.apple.com/DOCUMENTATION/Cocoa/Reference/Foundation/Protocols/NSKeyValueCoding_Protocol/Reference/Reference.html#//apple_ref/occ/instm/NSObject/mutableArrayValueForKey:" rel="nofollow noreferrer">-mutableArrayValueForKey:</a> and use that array to addObject: and such and it will in turn call the accessor methods and the KVO triggering will occur as well. There are also set accessors for use in for NSSets, see <a href="http://developer.apple.com/DOCUMENTATION/Cocoa/Conceptual/ModelObjects/cdAccessorMethods.html#//apple_ref/doc/uid/TP40002154-SW1" rel="nofollow noreferrer">here</a> and <a href="http://developer.apple.com/DOCUMENTATION/Cocoa/Reference/Foundation/Protocols/NSKeyValueCoding_Protocol/Reference/Reference.html#//apple_ref/occ/instm/NSObject/mutableSetValueForKey:" rel="nofollow noreferrer">here</a>.</p> <p>Example:</p> <pre><code>@interface MyClass : NSObject { NSMutableArray *_orders; } @property(retain) NSMutableArray *orders; - (NSUInteger)countOfOrders; - (id)objectInOrdersAtIndex:(NSUInteger)index; - (void)insertObject:(id)obj inOrdersAtIndex:(NSUInteger)index; - (void)removeObjectFromOrdersAtIndex:(NSUInteger)index; - (void)replaceObjectInOrdersAtIndex:(NSUInteger)index withObject:(id)obj; @end </code></pre>
    singulars
    1. This table or related slice is empty.
    1. POKey-Value-Observing a to-many relationship in Cocoa
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USangelokh
    1. USrobottobor
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POKey-Value-Observing a to-many relationship in Cocoa
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COor... you could just use an NSArrayController ;-)
      singulars
      1. PO
      1. USJason Coco
    2. COJason Coco: Yes, one generally should use an NSArrayController, but that doesn't solve the problem of how to mutate the underlying model and get KVO notifications.
      singulars
      1. PO
      1. USPeter Hosey
 

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