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问题 I have a ModalView called with : PreferencesController *nextWindow = [[[PreferencesController alloc] initWithNibName:@"Preferences" bundle:nil] autorelease]; nextWindow.wantsFullScreenLayout = YES; UINavigationController* navController = [[[UINavigationController alloc] initWithRootViewController:nextWindow] autorelease]; [self presentModalViewController:navController animated:YES]; It is initialised like this : - (void)viewDidLoad { [super viewDidLoad]; self.navigationController

问题 In my use case, I am trying to get value from dynamically generated hidden field in JQuery. When I click the button for that iteration I should get the value for the hidden field belongs to that iteration. But I am not able to get it. It is giving the value as 'undefined' HTML: <div class="comment-list-new" style= "max-height: 660px !important;overflow-y: scroll;"> <h5>Discussion Board</h5> <ol> {{ if .ViewData.Questions }} {{ range .ViewData.Questions }} <li> <p id="question_id" class=

问题 I was trying to use jQuery & Waypoints (formely jQuery Waypoints) to dynamically show hidden images when a user scrolls down. I found out that I can quite easily add a waypoint to an element and have the handler triggered when the element is "in view" (with the offset property set at bottom-in-view). However, trying to use the same property doesn't work on an hidden element: the handler is triggered right after the page is loaded. E.g.: hiding already-displayed elements when they get in the

问题 I am working on a cookbook website using django and have run into a problem with a foreign key field in my form the problem is that when i create my recipe i need to have a foreign key pointing to the cookbook that created this recipe but I don't want the user creating the recipe to see the original_cookbook field (they shouldn't have to) I believe I need to use a widget (HiddenInput) but am I getting confused with the examples given on other sites. Also my friend mentioned something about

问题 I am using $(this).serialize() when submitting a form. It works well, except in times when I (for some reason) have 2 fields with same name (one visible, and one not, and I am not talking about type="visible" but display:none )... But of course serialize has no regard for this... it just takes them all. I tried this var $disabled_list = $(this).find('input:hidden,select:hidden,textarea:hidden').attr('disabled', 'disabled'); $(this).serialize(); $disabled_list.attr('disabled',''); and It is

问题 I am having a weird issue with rails form validation. Currently the validation works fine if the form is visible when the page loads but nothing happens if the form is initially hidden and displayed upon user interaction with the page. Model class PushNotification < ActiveRecord::Base belongs_to :application, foreign_key: :appId, primary_key: :appid validates :message, :presence => true, :length => { maximum: 75 } validates :max_message_frequency, :presence => true, :numericality => {:only

问题 I am using Jquery to change the value of a hidden input to True when the user checks a checkbox in a different form field. It looks like this: $(function(){ $('.year').click(function(){ $('#carsearch').val('True'); }); It works great except if the user changes their mind and unchecks the box, the hidden input keeps the value of True . I want to make it so that if they change their mind and uncheck the .year input that it changes the value of #carsearch back to False . I would really

问题 I have a div width a with of 100% and hidden overflow holding a div with a width of 3000px. I want the 3000px div to be cut off evenly on the left and right. I would use background-position:center; however, it's more complicated than that. The 3000px div is holding 30 100px divs. I have tried using auto margins on the left and right of the 3000px div, but it did not work. Here is the css: .bgAnimHolder{ width:100%; height:500px; overflow:hidden; position:absolute; z-index:1; top:0px; } .row{

问题 HI, In JavaScript when value is set to a hidden input control, which event is fired? 回答1: Whenever you change the value of a hidden field using script, it wont fire any event. But you can manually trigger the event if you are using jQuery. Lets assume that you have the following hidden field <input type="hidden" id="hid" value="0" onchange="alert('Caught the hidden event');" /> When you change the value of the field using following code, it will not display the alert message. $("#hid").val("2

问题 HI, In JavaScript when value is set to a hidden input control, which event is fired? 回答1: Whenever you change the value of a hidden field using script, it wont fire any event. But you can manually trigger the event if you are using jQuery. Lets assume that you have the following hidden field <input type="hidden" id="hid" value="0" onchange="alert('Caught the hidden event');" /> When you change the value of the field using following code, it will not display the alert message. $("#hid").val("2