Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p><strong>Option A: Implement the method in a Category</strong></p> <p>Any properties used must be declared in <code>UIViewController</code>.</p> <p><code>UITableViewController</code> is a subclass of <code>UIViewController</code>. </p> <pre><code>//UIViewController+MyAdditions.h @interface UIViewController (MyAdditions) - (void)myCommonMethod; @end //UIViewController+MyAdditions.m @implementation UIViewController (MyAddtions) - (void)myCommonMethod { // insert code here } </code></pre> <p>The new method added to <code>UIViewController</code> will be inherited by <code>Bar1</code> and <code>Bar2</code></p> <p><strong>Option B: Create a <code>MyViewControllerHelper</code> class</strong></p> <p>If you can, implement your common code as a class method, otherwise you will need to create an instance of your helper class either temporarily or as a property of <code>Bar1</code> and <code>Bar2</code></p> <pre><code>@interface MyViewControllerHelper : NSObject - (void)myCommonMethod; @end @implementation MyViewControllerHelper - (void)myCommonMethod { // common code here } @interface Bar1 : UIViewController { MyViewControllerHelper *helper; } @property MyViewControllerHelper *helper; @end @implementation Bar1 @synthesize helper; - (void)someMethod { [helper myCommonMethod]; } @end @interface Bar2 : UITableViewController { MyViewControllerHelper *helper; } @property MyViewControllerHelper; @end @implementation Bar2 @synthesize helper; - (void)someOtherMethod { [helper myCommonMethod]; } @end </code></pre>
    singulars
    1. This table or related slice is empty.
    1. POiPhone: Sharing protocol/delegate code
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USfalconcreek
    1. USfalconcreek
    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. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. COOption A has some unnecessary risk, since you'll be adding delegate methods to the system UIViewController class. If the delegate protocol is entirely a custom one, it's probably safe, but if it's a system-provided protocol (e.g., UIActionSheetDelegate), you could theoretically break unrelated stuff (e.g., the system photo picker view controller).
      singulars
      1. PO
      1. USbenzado
    2. COIt's always about choice. Option A avoids delegation entirely which I thought might cause problems because UIViewController does not implement a delegate protocol but UITableViewController does. Foo and Bar examples don't provide enough context to determine whether they are useful utility methods that are *missing* from the API (think base64 encoding of strings). Any risk has to be weighed against violating the *dry* principle and the complexity of managing a category or coupling between a controller and new helper objects.
      singulars
      1. PO
      1. USfalconcreek
 

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