runtime | 易学教程

What are the risks of loading textures from images at runtime in XNA?

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问题 What is there to know about (apart from only being able to do that on PC) loading textures from images at runtime? 回答1: I've been exclusively loading my textures from streams as well, and the only "danger" that I can come up with is Premultiplied Alphas. You'll either need to process each texture as you load it, or render with premultiplied alphas disabled. Shawn Hargreaves wrote a great blog article on this subject. In the comments, he mentions: If you don't go through our Content Pipeline,

Dynamic code execution: String -> Runtime code VB.net

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问题 I'm trying to execute some code inside a string in runtime. I.E. Dim code As String = "IIf(1 = 2, True, False)" How do i run the code inside code string ? 回答1: As @ElektroStudios said - the proper way to do this is to use the CodeDom compiler, but this is a bit overkill for something as simple as this. You can sort of cheat and harness the power of a DataColumn Expression So for example: Dim formula = "IIF(Condition = 'Yes', 'Go', 'Stop')" Dim value As String = "Yes" Dim result As String 'add

Loading services from other .dll and run them isolated

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问题 I'd like to run several services from different .dll's in a isolated way. Basically, all services are derived from RoleEntryPoint , and I want to load each one in a separated AppDomain and run it there in a different thread. So far, I can locate the service and get its type: String pathToDll = @"C:\....\bin\Debug\ChildWorkerRole.dll"; Assembly assembly = Assembly.LoadFrom(pathToDll); Type serviceType = assembly.GetTypes().SingleOrDefault(t => t.BaseType == typeof(RoleEntryPoint)); And also

Is it possible to change launcher icon in android runtime with user selection? [duplicate]

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问题 This question already has answers here : How to change an application icon programmatically in Android? (9 answers) Closed 3 years ago . I want to use multiple launcher icon . what i want that user can change launcher icon with his selection is it possible to change launcher icon run time? 回答1: Strictly speaking you can not change launcher icon at run time. However there are few workarounds available for this: 1. Activity alias: Create multiple activity-alias tags in Manifest for your MAIN

eclipse配置tomcat

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1.先在本地下载解压好tomcat。 2.首先明白eclipse for Web Developers有多个地方可以配置服务器 window-perferences-server-Runtime Envirment：配置runtime Envirment window-perferences-tomcat：安装了tomcat插件就会有这个选项（还会在快捷工具栏里显示3个小猫的图案），这里配置tomcat后，会自动在Runtime Envirment里面加上tomcat配置 window-show view-servers：这里就是管理服务器的快捷窗口，可以在这里新建服务器，选择Runtime Envirment。 3.配置好服务器之后就可以部署项目了，右键Add and Remove。但是部署的项目并不会发布到我们自己安装的服务器上去，会发布到eclipse本身自带的服务器，需要更改设置，双击刚刚配置的服务器，配置如下。如果server locations是灰色的，需要先把部署的项目remove了。 4.这样发布项目后，就会在tomcat的webapps下看到你发布的项目了。参考： Eclipse中的Web项目自动部署到Tomcat 5.console和server窗口总是切换的问题进去perference找到server，去掉勾选Show Servers view when

Delphi - Referencing Components created at Runtime

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问题 I'm using Delphi 5 and I'm creating a number of panels at runtime, then creating buttons on the panels, obviously again at runtime. I need to do it this way because I may need to dynamically create more panel/button combinations in the future. I can do all of this, but I'm at a loss as to how to reference the panels I've created, because I can't find a way to access the panels' component name. Hunting around the Internet I've found that I can use FindComponent to find the panel components by

Create enum using reflection

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问题 Does C# offer a way to create Enum type from scratch using reflection? Suppose, I have a collection of strings : {"Single", "Married", "Divorced"} and I'm willing to build the following enum type in runtime: enum PersonStatus { Single, Married, Divorced } Is this somehow possible? 回答1: Not without doing really gnarly things like generating assemblies using Emit. How would you use such an enum anyway? Whats the real goal here? EDIT: Now that we know what you really want to do, this page

ios runtime基础知识

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与Runtime交互 Objective-C程序有有三种与runtime系统交互的级别：通过Objective-C源代码通过Foundation库中定义的NSObject提供的方法通过直接调用runtime方法通过Objective-C源代码在大多数的部分，运行时系统会自动运行并在后台运行。我们使用它只是写源代码并编译源代码。当编译包含Objective-C类和方法的代码时，编译器会创建实现了语言动态特性的数据结构和函数调用。该数据结构捕获在类、扩展和协议中所定义的信息。最重要的runtime函数是发消息函数，在编译时，编译器会转换成类似objc_msgSend这样的发送消息的函数。因此，我们通过写好源代码，编译器会自动帮助我们编译成runtime代码。通过NSObject提供的方法在Cocoa编程中，大部分的类都继承于NSObject，也就是说NSObject通常是根类，大部分的类都继承于NSObject。有些特殊的情况下，NSObject只是提供了它应该要做什么的模板，却没有提供所有必须的代码。有些NSObject提供的方法仅仅是为了查询运动时系统的相关信息，这此方法都可以反查自己。比如-isKindOfClass:和-isMemberOfClass:都是用于查询在继承体系中的位置。-respondsToSelector:指明是否接受特定的消息。

runtime学习笔记:（一）发送消息

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一， runtime的使用步骤如下：其中步骤二，操作如下二，使用runtime给类发送消息：假设我们给类定义了一个car类，实现方法如下：我们在viewcontroller中，使用runtime去调用这个类方法我们可以在控制台看到下面的输出日志：三使用runtime给实例发送消息; 控制台输出日志如下：可以发现，这两car的方法都被调用了。好了，今天的runtime简单使用就写到这里了，有什么不对的地方，欢迎大家批评指正！也期待和大家一起交流，讨论学习！来源： oschina 链接： https://my.oschina.net/u/2332019/blog/681926

Chrome插件开发

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Chrome的消息传递，可以在Web（通过content script）和扩展之间进行，任意一方都可发送或接收消息。Web（通过content script）发送消息如下： chrome.runtime.sendMessage({greeting: "hello"}, function(response) { console.log(response.farewell); }); 通过chrome.runtime.sendMessage函数发送消息，其中{greeting: "hello"}是消息对象（大括号的用法见参考资料[2]）；function(response) {...}是回调函数，处理接收方发回的消息。插件发送消息需要确定接收的Tab，如下： chrome.tabs.query({active: true, currentWindow: true}, function(tabs) { chrome.tabs.sendMessage(tabs[0].id, {greeting: "hello"}, function(response) { console.log(response.farewell); }); }); 以上代码指定当前tab为消息的接收者。接受端需要通过runtime.onMessage事件处理消息： chrome.runtime.onMessage

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