Objective-C

1. Defining ArraysSyntax format:Type Arrname[length]Length can be either a fixed integer value or an integer variable or an integer expression.If the element is not initialized when the array is defined, the default value is assigned to the element.

OC Method and file compilationFirst, OC method(i) Object methods(1) Object method with-opening as-(void) xx;(2) Object methods can only be called by object(3) The member variables of the current object can be accessed in the object method(4) Call

Code blocks are essentially similar to other variables. The difference is that the code block stores the data as a function body. With code blocks, you can pass in the number of parameters as you would call other standard functions, and get the

The single pattern of writing objective-c with GCD and C # has a big difference Declaring h file #import @interface me:nsobject@property ( nonatomic) Nsinteger age; +(instancetype) makeme; @endThe difference between Instancetype and IDInstancetype

Objective-c Object-Oriented programmingDirectory Understanding of object-oriented programming thought Declaration and definition of a class Instantiation of a class Inherited To write your own class library

Transferred from: http://www.isaced.com/post-213.htmlOBJECTIVE-C Calculating code run timeJune 25Today I saw an article on the performance optimization of iOS apps, which mentions the running time of the calculation code, which is very useful and

objective-c Proxy Mode (delegate)One, what is the proxy mode? Proxy mode is a kind of design pattern that is often encountered in OC, what is called proxy mode? For example: There is a baby, he himself does not eat and bathe and so on some things,

One, polymorphic use mode1, the parent class object type points to the subclass object.Two, polymorphic advantages1, in the parameters of a function or method, the parent class object type can accept multiple-seed-class-object-passed parameters at

One, inherit the syntax form:@interface Class Name: Parent class nameSecond, the main points of inheritance grammar:1, the inherited class is called the parent class or superclass, and the inherited class is called a subclass.2, basically all

#pragmaMark's copy of the demo string//deep Copy--object copy--content copy (generate new Object) New Object counter +1, original object unchangedvoidstringmutablecopy () {//string = 1NSString *string= [[NSString Alloc]initwithformat:@"Age is

Do not repost the labor results of developers The control statements in objective-C include the following: ? Branch statement: If-Else, switch ? Loop statement: while, do-while, ? Jump statements related to program transfer: Break, continue,

Describes common objective-c Functions and constant variables.Arithmetic functions Arithmetic functions] Function Name Description Int rand () Random Number Generation.(Example)Srand (Time (NiL); // initial

I. Introduction 1. C Language C language is a process-oriented language. OC adds the smallest object-oriented syntax based on C language. Why is it the smallest object-oriented syntax? Because OC removes some complex object-oriented syntaxes, and

Several common nsarray methods.   Nsarray * immutablearray = [[nsarray alloc] initwitharray: mutablearray]   Nsarray * immutablearray = [nsarray arraywitharray: mutablearray];   Nsarray * immutablearray = [mutablearray copy];   1. Both alloc and

The code block is essentially similar to other variables. The difference is that the data stored in the code block is a function body. Using a code block, you can pass in the number of arguments and get the return value just like calling other

Nsnumber of objective-C Foundation, nsvalue, nsdate   1. Use nsnumber as follows: In objective-C, there is an int data type, so why should we use the numeric object nsnumber. This is because many classes (such as nsarray) require the use of objects,

Nsarray   Create nsarray Nsarray * array = [nsarray arraywithobject: @ "Jack"] create a single element   Nsarray * array3 = [nsarray arraywithobjects: @ "Jack", @ "Rose", nil] create multiple elements   Quickly create an nsarray object Nsarray *

After Apple's iOS 8 was released, Everyone began to adapt. However, this process will always encounter some obstacles, such as API changes pushed. However, a variety of third-party static libraries are embedded in commercial projects. The quality of

Using Arc can help us reduce the burden of memory management, especially for programmers who are familiar with Java. Recently, the cfobject and nsobject conversions were encountered when obtaining the local address book. Because arc cannot manage

In Objective-c, there is an int data type. Why do we need to use the numeric object NSNumber? This is because many classes (such as NSArray) require the use of objects, whereas int is not an object.NSNumber is a numeric object. We can use the