iOS Basic Knowledge Learning

Chapter I. Mac OS X

1.MAC operating system, commonly known as Snow Leopard system, develops iphone development first to install Mac system.

2.objective-c is a C language-based extension

The 3.Mac App Store is Apple's electronic marketplace, and programmers develop programs that must be uploaded to the store for others to download.

4.Appkit for Mac interface Development, Uikit for iphone interface development.

5.Application Kit framework includes implementation graphics, event-driven, etc.

6.Xcode is a useful tool for developing Mac OS and iOS applications, so use it skillfully.

7.Xcode provides automatic code generation.

Chapter II Fundamentals of Objective programming

1.objective-c is an object-oriented development language that was first based on the Smaltalk language.

The basic data type of 2.OC is divided into int type float type bool type double type, etc.

The 3.sel selector is implemented by a selector called selector.

SEL Variable name = @selector (method name);

SEL Variable name =nsselectorfromstring (string of method name)

NSString * Variable name =nsstringfromselector (sel parameter)

4. Private string constants declared in. m and. mm files

public string constants are declared in the. h file

iOS Basic Knowledge Learning