selector

A Sprite Kit game I'm working on uses a custom slider to act as a color picker (the color is picked from the slider track graphic, which is a UIImage containing a gradient). I looked into using a customised UISlider , but standard IOS UI controls don't play well with Sprite Kit's Scenes: they're difficult to position relative to the rest of the Scene (as they exist as a subview of the main View rather than as a part of a SKScene ), they pop into existence (rather than transitioning with the rest of the Scene) and must be manually removed when exiting the scene. In short, implementing them is a

android的背景选择器selector算是比较常用的了。我们在做页面的时候，系统原生的按钮了，listView的item了，他们在被选中的时候那种屎黄色的背景。。。。。。。 所以我们就会用到selector来设置北京，其实selector就是一个xml的配置文件，要放在drawable下面 drawable/list_item_bg.xml <?xml version="1.0" encoding="utf-8" ?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <!-- 默认时的背景图片--> <item android:drawable="@drawable/pic1" /> <!-- 没有焦点时的背景图片--> <item android:state_window_focused="false" android:drawable="@drawable/pic1" /> <!-- 非触摸模式下获得焦点并单击时的背景图片--> <item android:state_focused="true" android:state_pressed="true" android:drawable="@drawable/pic2" /> <!-- 触摸模式下单击时的背景图片--> <item

Can anyone tell me why this code gives the error message "Argument of '#selector' does not refer to an '@objc' method, property or initializer"? timer = Timer.scheduledTimer(timeInterval: 0.1, target: self, selector:#selector(updateTimer(until: 3)), userInfo: nil, repeats: true) Here's the function: func updateTimer(until endTime: Int) { counter -= 1 timeLabel.text = String(counter) if counter == endTime { step += 1 } } What I have tried: 1. Adding @objc in front of the function. The selector of a target / action method must be declared either without parameter or with one parameter passing

I would like to do something like this: jqueryElement.find('divIdWithIterator**').each(...); where 'divIdWithIterator**' matches all elements with ids that start with 'divIdWithIterator' and end in a number, such as: divIdWithIterator1, divIdWithIterator2, divIdWithIterator26 What is a good way to do this in jQuery? Thanks! Unfortunately, there is no regular expression selector. You could use the attribute-starts-with selector , then filter the results and check for numeric endings using search() Eg var divs = jqueryElement.find('[id^="divIdWithIterator"]').filter(function(index){ return this

I was wondering: what's the difference between writing a selector name with no colon @selector(mySelector) , or @selector(mySelector:) with the colon? As in: UIBarButtonItem *addButton = [[UIBarButtonItem alloc]initWith... target:self action:@selector(addAction:)]; I can't find another example without the colon, but I'm quite sure I have already seen some of them. The colon is needed after the method's name if and only if the method takes an argument. No function parameters: -(void)addAction {} // Use ...@selector(addAction)... Has parameter: -(void)addAction:(id)info {} // Use ...@selector

I have div with id #wrapper and all element are inside it. I'm caching wrapper by doing var $wrapper = $('#wrapper'); Now any time i want to make a selector or reference an element, i do $wrapper.find('#whatever').click(.... By doing this i avoid wrapping with jQuery object again, so any selector i do in the future will be based on the cached $wrapper . But on the other when i use find() with the cached $wrapper, i know it will search all elements inside #wrapper . My questions is whic is better better, use cached variable along with find then issue click event, or just simply do $('#whatever'

I have some code like this and I want to select every <a> tag with the class status in the div foo <div id="foo"> ... <a class = "status"> ... </a> ... </div> You can do this $('#foo').find('.status') The selector would be: $("#foo a.status"); Try this and read this : $("#foo a.status") Good luck! This works. $("#foo").find("a.status") Try this: $('div#foo a.status') The docs are here try with $('div#foo > a.status') it selects the anchors which are DIRECT children of div #foo jQuery('#foo') //select elm with id foo .find('a.status') //find anchor with class There is no such thing as a "jQuery

How does one call an @selector method with multiple arguments? I have the following [self performSelector:@selector(changeImage:withString:) withObject:A1 withObject:fileString2 afterDelay:0.1]; but get an unrecognized selector sent to instance error My method I am calling is as follows -(void) changeImage: (UIButton *) button withString: (NSString *) string { [button setImage:[UIImage imageNamed:string] forState:UIControlStateNormal]; } You should use NSInvocation NSInvocation *invocation = [NSInvocation invocationWithMethodSignature: [self methodSignatureForSelector:@selector(changeImage

I have this code in a prepareForSegue method // Get destination view UIViewController *viewController = [segue destinationViewController]; //See if it responds to a selector if ([viewController respondsToSelector:@selector(setSomethingOrOther:)]) { //if so call it with some data [viewController setSomethingOrOther:something]; } The code above means I do not have to include a reference to the actual class of the view controller being segue'd to. I can more loosely couple the two view controllers and just check if it responds to some property being set on it. The problem is that when I do this I

This question already has answers here : Closed 6 years ago . Possible Duplicate: How to get elements with multiple classes Working on a bit of javascript code that sets the current URL of the referring page to pass into an iframe widget. No control over the code of the page on which the javascript resides, except for the one bit of javascript code. An example of the element value I need to grab is as follows: <div id="new_p_2FRolls-Royce_p_2F2013-Rolls-Royce-Phantom_p_2BDrophead_p_2BCoupe-4a5be12c0a0a00650143b598a45df25d_p_2Ehtm" class="page NEW_VEHICLE_DETAILS current"> What I'm trying to do