Objective-C 外观模式--简单介绍和使用

1 #import <Foundation/Foundation.h>
2 
3 @interface Shape : NSObject
4 
5 - (void)draw;
6 
7 @end

1 #import "Shape.h"
2 
3 @interface RectShape : Shape
4 
5 - (void)draw;
6 
7 @end

1 #import "Shape.h"
2 
3 @interface RectShape : Shape
4 
5 - (void)draw;
6 
7 @end

 1 #import <Foundation/Foundation.h>
 2 #import "RectShape.h"
 3 #import "CircleShape.h"
 4 
 5 @interface DrawShape : NSObject
 6 
 7 + (void)drawRectShape;
 8 + (void)drawCircleShape;
 9 
10 @end

 1 #import "ViewController.h"
 2 #import "DrawShape.h"
 3 
 4 @interface ViewController ()
 5 
 6 @end
 7 
 8 @implementation ViewController
 9 
10 - (void)viewDidLoad {
11     [super viewDidLoad];
12     
13     //调用画画接口
14     [DrawShape drawRectShape];
15     [DrawShape drawCircleShape];
16     
17 }
18 
19 
20 @end