runtime

iOS RunTime理解笔记

試著忘記壹切 提交于 2019-12-02 15:34:02
iOS:RunTime(运行时) RunTime简称运行时。就是系统在运行的时候的一些机制,其中最主要的是消息机制。 对于C语言,函数的调用在编译的时候会决定调用哪个函数。编译完成之后直接顺序执行,无任何异议。 OC的函数调用被称为消息发送。属于动态调用过程。在编译的时候并不能决定真正调用哪个函数(事实证明,在编译时,OC可以调用任何函数,即使这个函数并未实现,只要申明过就不会报错。而C语言在编译阶段就会报错)。只有在真正运行的时候才会根据函数的名称找 到对应的函数来调用。 例如: [obj makeText]; 其中obj是一个对象,makeText是一个函数名称。对于这样一个简单的调用。在编译时RunTime会将上述代码转化成 objc_msgSend(obj,@selector(makeText)); iOS中的obj都继承于NSObject @interface NSObject { Class isa OBJC_ISA_AVAILABILITY; } 在NSObjcet中存在一个Class的isa指针。然后我们看看Class: typedef struct objc_class *Class; struct objc_class { Class isa; // 指向metaclass Class super_class ; // 指向其父类 const char

ET199加密锁设置和使用

删除回忆录丶 提交于 2019-12-02 15:11:29
文章目录 加密锁初始化设置 加密文件 替换原文件为加密文件 加密锁初始化设置 选中 设置外壳种子码 取消 修改ATR 输入客户 种子码 ,例如 杭州千麦 可以输入 hangzhouqianmai 单击 初始化 查看 客户号 加密文件 电脑插入加密锁 打开文件加密程序 添加需要加密的文件 输入插在电脑上的加密锁的客户号 输入加密锁检测时间 输入加密狗提示框的标题 输入加密狗提示框的内容 单击 保护全部文件 按钮(就是那个中间带红色的齿轮形状按钮) 替换原文件为加密文件 拷贝runtime.dll文件到程序根目录下 删除源文件 把"enc_"开头的加密文件重名为原文件的名字 例如原文件为 "Kang.dll" ,则加密后会在原文件所在的目录下生成加密文件,名为 "enc_Kang.dll" 和 "runtime.dll" "runtime.dll"有且只会生成一个。加密多个文件时,也只生成一个runtime.dll文件 接下来程序需要插入加密狗才可以运行,不插入加密狗则会弹出相应提示 来源: https://blog.csdn.net/weixin_44448313/article/details/102778229

“Segmentation fault” vs “run time” error?

懵懂的女人 提交于 2019-12-02 14:37:51
问题 Consider this piece of snippet : char *str = "hellow Ghost"; str[0] = 'z'; printf("%s", str); It is a segmentation fault. Also does it come under run time memory error ? What I understood by segmentation fault is : Segmentation fault when you are accessing a memory that doesn't belong to you. It is basically a utility created for you to ease your work without letting you corrupt the memory. How much and what kind of memory errors Segmentation fault covers and what invokes it to check out that

在使用 .NET Remoting 技术开发跨进程通信时可能遇到的各种异常

孤人 提交于 2019-12-02 14:25:24
在使用 .NET Remoting 开发跨进程应用的时候,你可能会遇到一些异常。因为这些异常在后验的时候非常简单但在一开始有各种异常烦扰的时候却并不清晰,所以我将这些异常整理到此文中,方便小伙伴们通过搜索引擎查阅。 本文内容 连接到 IPC 端口失败: 系统找不到指定的文件 找不到请求的服务 信道“ipc”已注册 连接到 IPC 端口失败: 系统找不到指定的文件 System.Runtime.Remoting.RemotingException:“连接到 IPC 端口失败: 系统找不到指定的文件。” 或者英文版: System.Runtime.Remoting.RemotingException: Failed to connect to an IPC Port: The system cannot find the file specified. 出现此异常时,说明你获取到了一个远端对象,但是在使用此对象的时候,甚至还没有注册 IPC 端口。 比如,下面的代码是注册一个 IPC 端口的一种比较粗暴的写法,传入的 portName 是 IPC 的 Uri 路径前缀。例如我可以传入 walterlv ,这样一个 IPC 对象的格式大约类似 ipc://walterlv/xxx 。 private static void RegisterChannel ( string

Error when trying to execute a command in java [duplicate]

你离开我真会死。 提交于 2019-12-02 13:07:53
This question already has an answer here: How to use “cd” command using Java runtime? 7 answers I am trying to run a java file using the terminal but from java. Meaning, I'll run the command using java. I am trying to execute the command 'cd /Users/apple/Documents/Documents/workspace/UserTesting/src ' that redirects to the following directory and then execute the command 'ls' that lists all the files in the current directory I am using this method to run the Java file 'NewFile.java' try { String line; Process p = Runtime.getRuntime().exec( "cd /Users/apple/Documents/Documents/workspace

golang直接获取当前函数名称

与世无争的帅哥 提交于 2019-12-02 13:02:28
// 获取正在运行的函数名 func runFuncName()string{ pc := make([]uintptr,1) runtime.Callers(2,pc) f := runtime.FuncForPC(pc[0]) return f.Name() } 使用方法 package main import( "fmt" "runtime" ) // 获取正在运行的函数名 func runFuncName()string{ pc := make([]uintptr,1) runtime.Callers(2,pc) f := runtime.FuncForPC(pc[0]) return f.Name() } func test1(){ i:=0 fmt.Println("i =",i) fmt.Println("FuncName1 =",runFuncName()) } func test2(){ i:=1 fmt.Println("i =",i) fmt.Println("FuncName2 =",runFuncName()) } func main(){ fmt.Println("打印运行中的函数名") test1() test2() } 来源: https://www.cnblogs.com/MyUniverse/p/11746163.html

How do I make a new Moose class and instantiate an object of that class at runtime?

て烟熏妆下的殇ゞ 提交于 2019-12-02 12:38:37
问题 After creating a metaclass using Moose::Meta::Class->create , how do I instantiate a real Moose class with that class as a metaclass? (I need to create the metaclass also because I also want to apply some roles to it.) 回答1: The metaclass is the class, of course. If you want an instance of that class, just do: my $instance = $meta->name->new You might also need to make sure that $meta doesn't get collected too soon. Generally, you do this: $meta->add_method( meta => sub { $meta } ); That will

Run program.exe from eclipse plugin project

强颜欢笑 提交于 2019-12-02 12:37:39
I am writing an eclipse-plugin witch run program.exe. I have added program.exe to plugin jar file. How can a execute this program? public class Handler extends AbstractHandler { public Object execute(ExecutionEvent event) throws ExecutionException { Runtime.getRuntime().exec(/*What should I write here*/); return null; } } You can't run the program.exe from inside the plugin jar, so it needs to be extracted. In your plugin use: Bundle bundle = Platform.getBundle("plugin id"); URL url = FileLocator.find(bundle, new Path("relative path to program"), null); url = FileLocator.toFileURL(url); This

How to list variables for NSManagedObject

て烟熏妆下的殇ゞ 提交于 2019-12-02 12:26:28
问题 I needs to list variables for NSManagedObject, I know there is a way to do it using "class_copyIvarList" as given in How do I list all fields of an object in Objective-C? but "class_copyIvarList" isn't working on "NSManagedObject". here is piece of code Im using, which is working perfectly fine for "NSObject" but not for "NSManagedObject": unsigned int outCount; Ivar *vars = class_copyIvarList([self class], &outCount); for (int i = 0; i < outCount; i++) { Ivar var = vars[i]; unsigned int

Load a class using reflection then edit the variables during runtime

狂风中的少年 提交于 2019-12-02 12:24:07
Okay, so I have a java file which is loading another class and I want the java file to be able to edit and read variables from the class which is running. For example: I have a button which when pressed it sets a variable (This is the class file). I want the java file which is loading this class to be able to see the new value of the variable read it, set it and do whatever is needed. And I want the new value which is set to show up on the running java class. This is what I have tried so far but when I try to edit the values like getting baseX it doesn't show up on the running class. Also, the