Objective-C

We first assume that we have created a class now, and we are named MyObject, and inherit from NSObject. Inheritance know, it is you this subclass (MyObject) If you do not write anything, and the parent class (NSObject) is exactly the same. Almost

NSNumber Basic Data Type wrapper class://Main.m04-nsnumber//Created by Ma C on 15/8/17.Copyright (c) 2015 BJSXT. All rights reserved.//#import int main (int argc, const char * argv[]){@autoreleasepool{NSNumber Test (basic data wrapper class)NSNumber

Sliding deletion is already supported in the current iOS version, but it is complicated to say that there are multiple features after sliding, not deleting the function, then you have to write it yourself, I'm right ...In fact, on the slide to

//Main.min OC. Grammar//Created by won't tell you who I am on 15-8-9.Copyright (c) year Xuqigang. All rights reserved.//#import #import "Test01.h"@interface Test01:nsobject//{int A;@public int b;int C;//}@property int C;-(void) print;int Main (int

OC It provides a different way of--category, which can dynamically add new behaviors to existing classes (methods), which ensures the original design of smaller classes, and then gradually joins the extensions.You do not need to create a subclass

Description: This objective-c topic is a prelude to learning iOS development, and to enable programmers with experience in object-oriented language development to quickly get started with objective-c. If you do not have programming experience, or

Let's say private methods,Due to the dynamic messaging mechanism of objective-c, there is no real private method in OC.But if you do not declare in the. h file, only in the. m file, or in the class extension of the. m file, it is basically the same

1. Apple Recommended method Locate target and change its other Linker Flags to:-all_load or-force_load-force_load, followed by a file location, allows you to load the required files more precisely. To put it simply, the dynamic nature of

An object of type ID in Objective-c can be converted to any kind of object, somewhat similar to the effect of a void* pointer type. The following is a brief description of the ID type.ID Marker: Common Object type. The ID type is a unique data type

1 Nsrangetypedef struct _NSRANGE {Nsuinteger location;Nsuinteger length;} Nsrange;Functions of the NsmakerangeNs_inlinez is an inline functiontypedef nsrange *nsrangepointer;Ns_inline nsrange nsmakerange (Nsuinteger Loc, Nsuinteger len) {Nsrange R;r.

Memory management arc and auto-release Pool A variable ownership modifier in ArcVariable modifiers, which are used primarily to identify the life cycle of an object. These concepts are not available in manual memory management methods.There are

Each instance variable defines two methods: Set the setter method of the variable to get the getter method of the variable valueWriting specification for Set method The Set method must be an object method The Set method must not have a

1. OC There are several ways to create a string object? For example: How to create a String object: @ "Baby".There are 3 ways to create a string object in OC:Example: In the main.m file:　　Console output:　　2. How do I get the length of a string in OC?

1. Add tags to your code#pragma mark-#pragma mark2. Dot syntaxPerson *p = [person new];The essence of point syntax or method invocationP.age = 10; [P setage:10];int a = P.age; [P age];3. Scope of member variables@public: The member variables of an

Introduction to the excellent OBJECTIVE-C project on GitHubMake a brief introduction to the current GitHub top projects, so that you get a quick overview of some of Objective-c's best open source frameworks. Project Name Project

Single caseand other languages of the singleton production is not much, can be said to be the simplest of a design pattern. But there are a few points to note that a singleton is just one instance of a class.So we're going to try to stop this class

Construction method1. Principle of object creationNew Split two-part songPerson *p = [Person alloc]; Allocating memory (+ALLOC)Person *p = [P init]; Initialize (-init)Merge: Person *p = [[Person alloc] init];Rewrite of the 2.init method-(void) init {

objective-cgrammatical strings, those things.nsmutablestring class inherit the NSString class, then nsstring provides the method in nsmutablestring can be used in basic, nsmutablestring Like a list of strings, it can dynamically add strings to the

Objective-c can fully automate the memory management of the program, relying mainly on the management mechanism of reference counting in the Objective-cFirst of all:The guidelines for memory management are: If you use Class A for an object.

InitIn the Init method, the following line of code looks strange.if (self = [super init])Let's explain what this line of code means. In order for the superclass (here is NSObject) to complete all the required initialization work at once, you need to