Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <blockquote> <pre><code>[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(readPipe:) name: NSFileHandleReadCompletionNotification object: [[task standardOutput] fileHandleForReading]]; [[[task standardOutput] fileHandleForReading] readInBackgroundAndNotify]; </code></pre> </blockquote> <p>You're assuming that the pipe will return the same NSFileHandle object both times.</p> <p>If it doesn't, then the object that posted the notification and the object you're observing for won't be the same object. That would explain why you're not seeing the notification, so I wouldn't count on that.</p> <p>Try getting the NSFileHandle separately and assigning it to a variable, then using the variable in both the <code>addObserver:selector:name:object:</code> and <code>readInBackgroundAndNotify</code> message expressions.</p> <blockquote> <pre><code>[task waitUntilExit]; </code></pre> </blockquote> <p>You're blocking your UI until the task is done. <code>waitUntilExit</code> should be considered harmful, for that reason at least, and probably others.</p> <p><code>waitUntilExit</code> uses the run loop, so I'm moderately surprised if the window isn't getting a chance to draw while it waits, but it's worth changing anyway, both as a potential fix (if indeed that is the problem) and because blocking the UI is bad in itself.</p> <p>Consider observing for <code>NSTaskDidTerminateNotification</code> (which you should set up before you launch) instead. You can post your own notification when that notification arrives.</p>
    singulars
    1. This table or related slice is empty.
    1. POreadInBackgroundAndNotify method not updating until NSTask complete
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USPeter Hosey
    1. USPeter Hosey
    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. This table or related slice is empty.
    1. COWell on closer inspection of the logs, it looks like it is being called, and the text eventually ends up in my textview, its just not doing until the Task is done, (which takes a while) thus my confusion . I actually had it coded as you describe initially but borrowed some code from the Moriority sample at Apple. Trying to figure out the blocking now. Anyones thoughts on the matter would be appreciated
      singulars
      1. PO
      1. USacidprime
    2. CO@acidprime: I've edited my answer.
      singulars
      1. PO
      1. USPeter Hosey
    3. COThanks for your help, I don't believe the waitUntilExit was an issue here as my NStask was running in its own thread, however I implemented the NSTaskDidTerminateNotification instead as it seems like a much better solution.
      singulars
      1. PO
      1. USacidprime
 

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