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Why is titleForHeaderInSection method called multiple times?


Why is titleForHeaderInSection method called multiple times?

By : Wei Xiao
Date : November 14 2020, 04:51 PM
wish helps you Delegate methods of UITableView can be called at any time during app execution and no one should completely rely on how many times they're called. Lots of external events can force the UITableView to reload its data, so you have to be very careful when you depend on this function call.
code :


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Method called multiple times, instead of once

Method called multiple times, instead of once


By : Favio
Date : March 29 2020, 07:55 AM
I wish this help you You should not use delegation method .live here because every time editItem called new keydown callback is added to the stack of earlier callbacks.
So just two things to be changed:
code :
// change .live('keydown', ...) to .keydown(...) or .bind('keydown', ...)
$('#itemDescriptionEdit').keydown(function (e) {

    // ...

    // and return false at the end of callback to stop event propagation
    return false;
});
Method is called multiple times but called only once

Method is called multiple times but called only once


By : Sekhar Nalla
Date : March 29 2020, 07:55 AM
help you fix your problem Its most likely because you're calling login from onSessionState changed.
When you login what do think is going to happen to the session, it's going to change right. And when it changes it calls onSessionState change and you call login.
method called multiple times

method called multiple times


By : Guy Ronen
Date : March 29 2020, 07:55 AM
With these it helps You are binding the click event deleteModal element everytime you call the confirm() method! So you have to unbind() and bind() again like you did at the deleteComment buttons.
Like this:
code :
this.confirm = function(head, question, callback) {
        $(".modal-title").html(head);
        var body = $("<p/>").text(question);
        $(".modal-body").html(body);
        $("#deleteModal").unbind().bind('click', function(event) {
            callback();
            $('.customModal').modal('hide');
        });
        $('.customModal').modal('show');
}
Why NSApplicationDelegate method openFiles: is being called multiple times on a multiple drag to the dock icon?

Why NSApplicationDelegate method openFiles: is being called multiple times on a multiple drag to the dock icon?


By : Stefan Mieczkowski
Date : March 29 2020, 07:55 AM
will be helpful for those in need I've seen this behavior in one of my apps (usually when dragging a whole bunch of files at one time). As I workaround, instead of opening the files directly from application:openFiles:, I queue them up and open the queued files after a small delay. Something like the following:
code :
- (void) application:(NSApplication*)sender openFiles:(NSArray*)filenames
{
    // I saw cases in which dragging a bunch of files onto the app
    // actually called application:openFiles several times, resulting
    // in more than one window, with the dragged files split amongst them.
    // This is lame.  So we queue them up and open them all at once later.
    [self queueFilesForOpening:filenames];

    [NSApp replyToOpenOrPrint:NSApplicationDelegateReplySuccess];
}


- (void) queueFilesForOpening:(NSArray*)filenames
{
    [self.filesToOpen addObjectsFromArray:filenames];
    [self performSelector:@selector(openQueuedFiles) withObject:nil afterDelay:0.25];
}


- (void) openQueuedFiles
{
    if( self.filesToOpen.count == 0 ) return;

    [self makeNewWindowWithFiles:self.filesToOpen];

    [self.filesToOpen removeAllObjects];
}
Vue.js method called multiple times using $emit and $on when it should only be called once

Vue.js method called multiple times using $emit and $on when it should only be called once


By : user6417151
Date : March 29 2020, 07:55 AM
To fix the issue you can do I'm using a bus to allow components to interact with other components via the method described in this link: https://forum.vuejs.org/t/create-event-bus-in-webpack-template/4546/2 . , Had to remove the event handler on destroy.
code :
 beforeDestroy () {
    EventBus.$off('increment', this.incrementCount)
 },
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