objective c delegate

IntroductionDelegate is an existing feature of Dotnet1.0, but it has not been collated since it has never had a chance to use the delegate feature in real work. These two days, I re-read some information about delegate and began to formally organize the famous features in C #. This paper will discuss the characteristics of delegate.What is a. Delegate?

If you assign a value to a form control label Delegate voidSetlabeltext (intSTR);//defines a delegate that is used to complete the assignment of a thread /// ///assign a value to a label/// /// Private voidSetLabel (intstr) { This. Lbcounty.text =Convert.ToInt32 (str). ToString (); }//you need to call the move totals with a

When you click the mouse, hide or show the P element:$ ("div"). Delegate ("button", "click", Function () { $ ("P"). Slidetoggle ();});The delegate () method adds one or more event handlers for the specified element (the child element of the selected element) and specifies the function to run when these events occur.Event handlers that use the delegate () method

The delegate () method adds one or more event handlers for the specified element (the child elements of the selected element) and specifies the function to run when these events occur. Let's take a look at the details below. Syntax structure: The code is as follows: $ (selector). Delegate (Childofselector,type,data,function) Parameter description: Childselector required. Specify one or more

that contains one or more JavaScript event types, such as the name of the Click,submit or custom event, separating each type with a space when specifying multiple event types; EventData is the map type. Gives the data to be passed to the event handler, handler specifies the function to execute when the event is triggered, EventObject represents the event object. The. One () method is similar to. bind (), and the event handler that is bound with. One () is automatically unbound after execution.

C # Inside the socket has asynchronous and synchronous points, can refer to: Https://docs.microsoft.com/en-us/dotnet/framework/network-programming/socket-code-examples to learn. Many examples of DirectSound socket sound collection on the network, but are a separate tool class (such as: Directsoundcapture), took a bit of time to implement the socket call, by the way sum up share. The following illustration is a test example: Socket Client Using System; Using System.Collections.Generic; Using Sys

Rewrite the OnLoad method by adding the following code. Protectedoverridevoid OnLoad (EventArgs e) { base. OnLoad (e); } In the OnLoad method, add the following code to add ECMAScript to the page. String Helloalert = "alert (' Hello, world! ');"; This. Page.ClientScript.RegisterClientScriptBlock (this. GetType (), "popup", Helloalert, True); You have now generated a delegate control for your project. Next, you will create a feature to depl

purpose of inheritance is to implement type polymorphism, the reference to the "parent class" is defective. It is due to the lack of a clear understanding of the two aspects of the inheritance function, which leads to the so-called "abuse of inheritance". As mentioned earlier, inheritance is a very strong type constraint, when the purpose is only to reuse, if the use of inheritance, often bring some side effects, such as: In C #, the object in its life cycle can not change the inheritance rela

CommissionedA delegate in C # (Delegate) is similar to a pointer to a function in C or C + +. A delegate (Delegate) is a reference type variable that holds a reference to a method. References can be changed at run time.Delegate ( Delegate) is particularly useful for implemen

What is a delegate A delegate is a class that defines a method's type so that it can be passed as a parameter to another method, which dynamically assigns the method to the parameter, avoids the large use of the If-else (Switch) statement in the program, and makes the program more extensible. Using delegates, you can bind multiple methods to the same deleg