selector

问题 This question already has answers here : Can an html element have multiple ids? (17 answers) Closed 5 years ago . Needed to know if an HTML element can have multiple attributes of ID's , for instance : <input type="text" id="identifier1" id="selector1" /> As I needed to clarify this statement mentioned about selectors at W3 website. If an element has multiple ID attributes, all of them must be treated as IDs for that element for the purposes of the ID selector. Such a situation could be

问题 This question already has answers here : Can an html element have multiple ids? (17 answers) Closed 5 years ago . Needed to know if an HTML element can have multiple attributes of ID's , for instance : <input type="text" id="identifier1" id="selector1" /> As I needed to clarify this statement mentioned about selectors at W3 website. If an element has multiple ID attributes, all of them must be treated as IDs for that element for the purposes of the ID selector. Such a situation could be

问题 I recently learned to use delegates to send messages from one class to another whenever a button is pressed and I'd like to find out how to send a message without a button action. Apple documentation suggests a likely method is performSelector:(SEL)aSelector; but I had no luck when I tried to use it. Instead, this is what I tried. In MicroTune.h , I defined a delegate and gave it a property @class Synth; @protocol TuningDelegate <NSObject> -(void)setTuning:(NSData *)tuningData; @end

问题 Sometimes when I am working with selectors in Swift (i.e. the Selector type), the string literal that I provide for the action parameter to methods like targetForAction(_:withSender:) or addTarget(_:action:) doesn't invoke or map to the actual Swift function to which I am expecting. For example, when an instance of MyResponder as shown below is in the responder chain, it cannot be found when calling targetForAction(_:withSender) using the string showImage: . What is the pattern for knowing

问题 This Dropkick change function updates the value of another <select> element when an option is selected. I'm using the function on 300+ pairs of <select> elements so I'd love to modify the function so as not to require specifying the selectors for each element. Since the elements aren't positioned next to each other, I'd like to incorporate this method for getting the next element with same name as the id of the selected input stackoverflow.com/a/7734190/1056713 EDIT - In order to simplify the

问题 I have a 'next' button which fades out a div, shows another, changes out a graphic and then... I want it to change the actual ID of the 'next' button but neither .html nor replaceWith seem to be working. I have this: $(document).ready(function(){ $('#portfolio').fadeTo(500,0.25); $('#account') .animate({width:"10.1875em",height:"11.1875em",duration:'medium'}); $('#next2_btn').click(function(){ $('#content').fadeTo(300, 0.0, function() { $('#content2').show(300, function() { $('#next2_btn').$(

问题 I have a UIViewController that has a UITableView as a subview. I am trying to add a pull-to-refresh on the table. Following some examples and discussions that I found here, I have the UIRefresh showing but it never calls the selector. I am not getting notified that the pull action happened. I cannot use a UITableViewController as my main controller as I need to add a fixed button at the bottom of the screen. I have the feeling I am missing something out that hopefully is obvious to someone

问题 I'm making a simple whack-a-mole game as my first mini-project for android. I'm not sure how to go about this. I know the basics of setting everything up and such but I'm not sure how to animate the moles and make it so that when the mole is in the up position it can be tapped and a point will be counted. I know I can do an image button and have a counter go up(counter++) but I need to be able to switch frames from the mole in the hole to the mole in the up position. I've been told to use a

问题 I'm making a simple whack-a-mole game as my first mini-project for android. I'm not sure how to go about this. I know the basics of setting everything up and such but I'm not sure how to animate the moles and make it so that when the mole is in the up position it can be tapped and a point will be counted. I know I can do an image button and have a counter go up(counter++) but I need to be able to switch frames from the mole in the hole to the mole in the up position. I've been told to use a

问题 in the code bellow how can i select the span element with id="read-more" if iam in the anchor element with id="preface-more-btn" using $(this) (to be applied for more than one button) in jquery? <pre> <div id="content"> <p> <span style="font-size: 16px;"></span> </p> <span id="read-more" style="display: none;"></span> <div class="more active" id="preface-more"> <a class="btn-more" id="preface-more-btn" href="#"></a> </div> </div> </pre> thank you for helping.. 回答1: var selector = $('#read