Oobject-c Basic Tutorial Summary

Lasted n Long finally took the book completely read the words never read a technical book finally have a small breakthrough

I've seen it. From the first chapter began to summarize the contents of the book refueling!!

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Chapter One: Departure

Ios-cocoa Touch

OS X-cocoa

Chapter II: Expansion of C

Objective-c is a subset of C.

Xcode Console window: View-debug area-acitvate Console | | Command+shift+c

. h:public API struct-body symbolic constant function prototype

. m:private API && Implementation

Xcode, compiler LLVM (Low level virtual machine), compatible with all 3 variants of C.

#import with # include but ensure that header files are included only once.

NSLOG----NS prefix to avoid name collisions-------parameter nsstring*%@

%@---Can print an object and automatically call the description method.

Set up Xcode to treat warn as Error: Build settings---treat warnings as errors

The bool type YES no can only be directly compared to the no value, and cannot be directly compared to the Yes value, because bool is the unsigned type, the lowest bit is 0 no, and the non 0 is YES.

Chapter Three: The basic knowledge of object-oriented programming

Object-oriented object-oriented programming OOP

To view the Xcode file default path: Product-scheme-edit Scheme

The ID type refers to any type of object

OC naming rules:

OC naming as far as possible so that the name can reflect their specific functions, long is not a problem!

Class First Capital Hump rule

Object first letter do not capitalize hump rules

//. h@interfaceCircle:nsobject//Inherit NSObject{Shapecolor fillcolor;//instance variable instance variable}+(void) Setfillcolor: (Shapecolor) FillColor;//+ declaring class methods-(void) SetBounds: (Shapecolor) bound;//-Declaring object methods@end//Circle//. M@interfaceCircle ()//Private@end//Circle@implementationCircle+(void) Setfillcolor: (shapecolor) fillcolor{//Code}//Setfillcolor-(void) SetBounds: (shapecolor) bound{//Code}//SetBounds@end//Circle

The fourth chapter: inheriting inheritance

Single inheritance

Method scheduling mechanism: First find in subclass and then find superclass

Compiler uses base address plus offset

The fifth chapter: Compound composition

A composite is implemented with an object pointer that is an instance variable.

Two steps before object use 1. Allocating Memory Alloc 2. Initializing init

Inherit Isa

Composite Hasa

Sixth Chapter: source File organization

Two ways to introduce header files:

1.import. h file

[Email protected] Tire; Forward reference

Seventh chapter: In-depth understanding of Xcode

Indent command+[Move code left command+] Move code right

Xcode Code Style Preferences-text editing-indentation

The eighth chapter: Foundation Kit Introduction

Ios--uikit

OS X--appkit

Some useful data types (struct)

Range: nsrange {unsigned int location,unsigned int length} nsmakerange ()//character range in string or range of elements in array nsnotfound

Geometry data type:

1cgpoint{float x,float y}//Cartesian plane coordinates cgpointmake ()

2cgsize{float width,float height}//Storage length and width cgsizemake ()

3cgrect{cgpoint origin,cgsize size}//Rectangle data type, coordinate and size composite cgrectmake ()

String (NSString nsmutablestring)

class method The class method used to create a new instance is called a factory method (factory)

stringWithFormat is the factory method.

Length

Isequaltostring: Compare NSString must use this method, can not directly compare pointers.

(Nscomparisonresult) Compare: (NSString *) astring

Results returned: enum{nsorderedascending = -1,nsorderedsame,nsordereddescending};

Compare:options:options including Nscaseinsensitivesearch Nsliteralsearch nsnumericsearch with | Symbolic connection

Hasprefix:

Hassuffix:

Rangeofstring:

nsmutablestring

StringWithCapacity:appendString:appendFormat:deleteCharactersInRange:

Nsarray

Limit: 1. Only object 2 can be stored. Nil 3 cannot be stored. Non-volatile

Created: 1.arrayWithObjects:

[Email protected] [Object1,object2,...]

Cut fraction Group: componentsseparatedbystring:

Componentsjoinedbystring:

Nsmutablearray

AddObject:

Removeobjectatindex:

Nineth Chapter: Memory Management

Tenth Chapter: Object initialization

The Init method in subclass must call [Super Init];

Oobject-c Basic Tutorial Summary