selector

How to convert a String to UIColor in Swift 3.0?

由 爷，独闯天下 提交于 2020-05-27 06:38:19
问题 I am trying to convert an existing program which uses a list of predefined colors from Objective-C to Swift. The original code used Selector to extract a UIColor based on it name represented as a NSString #define UIColorFromRGB(rgbValue) [UIColor colorWithRed:((float)((rgbValue & 0xFF0000) >> 16))/255.0 green:((float)((rgbValue & 0xFF00) >> 8))/255.0 blue:((float)(rgbValue & 0xFF))/255.0 alpha:1.0] -(UIColor *)getColor:(NSString*)colorName { SEL selColor = NSSelectorFromString(colorName);

How to convert a String to UIColor in Swift 3.0?

由 纵然是瞬间 提交于 2020-05-27 06:35:05
问题 I am trying to convert an existing program which uses a list of predefined colors from Objective-C to Swift. The original code used Selector to extract a UIColor based on it name represented as a NSString #define UIColorFromRGB(rgbValue) [UIColor colorWithRed:((float)((rgbValue & 0xFF0000) >> 16))/255.0 green:((float)((rgbValue & 0xFF00) >> 8))/255.0 blue:((float)(rgbValue & 0xFF))/255.0 alpha:1.0] -(UIColor *)getColor:(NSString*)colorName { SEL selColor = NSSelectorFromString(colorName);

Why Document.querySelector is more efficient than Element.querySelector

由 浪尽此生 提交于 2020-04-13 06:18:10
问题 I did a test with few iterations to test efficiency of Document.querySelector and Element.querySelector . Markup: <form> <input type="text" /> </form> Script: Querying with Document.querySelector begin = performance.now(); var i = 0, iterations = 999999; for ( i; i < iterations; i++ ) { element = document.querySelector('[type="text"]'); } end = performance.now(); firstResult = end - begin; Querying with Element.querySelector begin = performance.now(); var i = 0, iterations = 999999, form =

jdk的Selector源码分析（一）Selector概述

由 别来无恙 提交于 2020-03-15 10:39:44
1系列内容 jdk Selector设计情况 jdk nio poll在linux平台下的实现 jdk nio epoll在linux平台下的实现 netty 原生epoll在linux平台下的实现 epoll的2种通知模式边缘触发、水平触发 2 jdk Selector概述 首先来看下文档描述 2.1 创建方式 一个就是直接调用open方法 public static Selector open() throws IOException { return SelectorProvider.provider().openSelector(); } 或者调用选用某个SelectorProvider的openSelector public abstract AbstractSelector openSelector() 2.2 SelectionKey 一个Selector有3种SelectionKey集合 一种就是全部注册的SelectionKey集合，即keys()方法返回的结果 一种就是活跃的SelectionKey集合，即selectedKeys()方法返回的结果 第三种就是已取消的SelectionKey集合，这些已被取消但是还未从Selector取消注册 再确认下下面的几个问题： 什么叫注册 即将一个channel感兴趣的事件注册到Selector上，即如下方法

Databinding selector in TextView textColor

由 南楼画角 提交于 2020-02-27 07:56:48
问题 I am trying to set colors from a textview based on the number of unread messages in a channel. Like so: android:textColor="@{channel.unreadCount > 0 ? @color/selector_conversation_row_title_unread : @color/selector_conversation_row_title_read}" this only sets the color of the title, while: android:textColor="@color/selector_conversation_row_title_unread" this code sets the textColor as a selector, and if i press the TextView the color changes unlike the first statement. selector_conversation

Form CSS: Styling a radio box's parent (label) based on checked / unchecked status

由 拥有回忆 提交于 2020-02-03 08:14:33
问题 So i have a form. Most of the questions asked in the forms are using Radio inputs. i'm going with <label>Option1 <input type="radio"> </label> <label>Option2 <input type="radio"> </label> I'm styling the Labels using :hover, giving it a subtle background change to indicate which option you are highlighting. However, i want the label for the selected option to have a different colored background. Is there any way of doing this using CSS, or do I have to go with jQuery? What i want to do is

jQuery .eq(x) returns different element in IE than in FF/Chrome

由 北城以北 提交于 2020-02-01 05:03:47
问题 I am using the .eq() method to select a specific child element of a known element. It appears that the element indices are different in IE and in Chrome/FF, as .eq(2) returns different values depending on browser. (The element I'm looking for shows up as .eq(2) in FF/Chrome, but .eq(3) in IE) For example, alert($(this).parent().children().eq(2).text()); shows different results depending on the browser. Here's the markup in question: <div> <span> <input onclick="player.search.Groupings($(this)

jQuery .eq(x) returns different element in IE than in FF/Chrome

由 时光怂恿深爱的人放手 提交于 2020-02-01 05:03:10
问题 I am using the .eq() method to select a specific child element of a known element. It appears that the element indices are different in IE and in Chrome/FF, as .eq(2) returns different values depending on browser. (The element I'm looking for shows up as .eq(2) in FF/Chrome, but .eq(3) in IE) For example, alert($(this).parent().children().eq(2).text()); shows different results depending on the browser. Here's the markup in question: <div> <span> <input onclick="player.search.Groupings($(this)

How to load script with jquery.load()?

由 好久不见. 提交于 2020-01-25 08:52:05
问题 I have a question. In my file content.html I have script. When load this with the load() function of jQuery, the page shows but the script doesn't work. I think it's because of a selector. How can I solve that ? EDIT : $(document).ready(function(){ $('#content').load('content.html #toLoad', function(){}); }) Thanks 回答1: When you say "the script doesn't work" do you mean there's javascript in the page you're loading through ajax? It's not going to work, ever, at least not directly. You have

how to get the value from a textbox that is next to my text

由 生来就可爱ヽ(ⅴ＜●) 提交于 2020-01-25 00:05:21
问题 i have an html page where i have a table of items (one item per row) where each item is a html link that says "Add" and there is a textbox next to each link with a number in it. the text link and the textbox are in the same td inside the row of the table. how do i, using jquery, capture the value from the textbox that is to the right of the link i click on. 回答1: You could give your link a class, then do this: $("a.myClass").click(function() { alert($(this).next().val()); }); If you have a lot
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