Objective C Quick Start 4

Class

 

1. Method of merging accessors

@ Property member variable

@ Synthesize member variable

Allows the compiler to automatically combine methods for setting and obtaining functions. You do not need to manually generate set member variables or get member variables.

 

@ Interface complex: nsobject

{

Int ireal, iimag;

}

@ Property int ireal, iimag; // method of merging accessors. Part 1: @ property identity attribute

-(Void) print;

@ End

 

@ Implementation Complex

@ Synthesize ireal, iimag; // The method for merging accessors. Step 2: Tell the compiler to automatically generate accessors.

-(Void) print

{

Nslog (@ "ireal = % I, iimag = % I", ireal, iimag );

}

@ End

 

2. Call methods and members

[Mycomplex print];

Or mycomplex. Print

[Mycomplex ireal];

Or mycomplex. ireal

 

3. Multiple Parameter Methods

One method sets both the real and virtual parts

-(Void) setreal: (INT) n setimag :( INT) d

You can also omit the parameter name.

-(Void) setcomplex :( INT) n :( INT) d

 

4. Point to the instance itself. Self is equivalent to C ++ this