外观模式
封装，隐藏实现细节。简化了操作，简化流程，解耦，简化操作逻辑。-
应用，适用场景
- 复杂的子系统，改进使用操作类来操作子系统，通过使用操作类来启用子系统功能。
- 不关心逻辑，只要结果
- ShapeMaker
图形基类
//
// Shape.h
// LearnFacade
//
// Created by 印林泉 on 2017/3/5.
// Copyright © 2017年 ylq. All rights reserved.
//
#import <Foundation/Foundation.h>
@interface Shape : NSObject
- (void)draw;
@end
//
// Shape.m
// LearnFacade
//
// Created by 印林泉 on 2017/3/5.
// Copyright © 2017年 ylq. All rights reserved.
//
#import "Shape.h"
@implementation Shape
- (void)draw {
}
@end
矩形
//
// Rectangle.h
// LearnFacade
//
// Created by 印林泉 on 2017/3/5.
// Copyright © 2017年 ylq. All rights reserved.
//
#import "Shape.h"
#import <UIKit/UIKit.h>
@interface Rectangle : Shape
@property (nonatomic) CGFloat width;
@property (nonatomic) CGFloat height;
- (void)draw;
@end
//
// Rectangle.m
// LearnFacade
//
// Created by 印林泉 on 2017/3/5.
// Copyright © 2017年 ylq. All rights reserved.
//
#import "Rectangle.h"
@implementation Rectangle
- (void)draw {
///具体的实现
}
@end
圆形
//
// Circle.h
// LearnFacade
//
// Created by 印林泉 on 2017/3/5.
// Copyright © 2017年 ylq. All rights reserved.
//
#import "Shape.h"
#import <UIKit/UIKit.h>
@interface Circle : Shape
@property (nonatomic) CGFloat radius;
- (void)draw;
@end
//
// Circle.m
// LearnFacade
//
// Created by 印林泉 on 2017/3/5.
// Copyright © 2017年 ylq. All rights reserved.
//
#import "Circle.h"
@implementation Circle
- (void)draw {
///具体的实现
}
@end
图形操作类
//
// ShapeMaker.h
// LearnFacade
//
// Created by 印林泉 on 2017/3/5.
// Copyright © 2017年 ylq. All rights reserved.
//
#import <Foundation/Foundation.h>
#import "Rectangle.h"
#import "Circle.h"
@interface ShapeMaker : NSObject
///绘制圆
+ (void)drawCircleWithParas:(NSDictionary *)paras;
///绘制圆 + 矩形
+ (void)drawCircleAndRectangle:(NSDictionary *)paras;
@end
//
// ShapeMaker.m
// LearnFacade
//
// Created by 印林泉 on 2017/3/5.
// Copyright © 2017年 ylq. All rights reserved.
//
#import "ShapeMaker.h"
@implementation ShapeMaker
+ (void)drawCircleWithParas:(NSDictionary *)paras {
//／绘制了一个圆
Circle *circle = [Circle new];
circle.radius = 10.f;///paras里取
[circle draw];
}
+ (void)drawCircleAndRectangle:(NSDictionary *)paras {
//／绘制了一个圆
Circle *circle = [Circle new];
circle.radius = 10.f;///paras里取
[circle draw];
//／绘制了一个矩形
Rectangle *rectangle = [Rectangle new];
rectangle.width = 10.f;///paras里取
rectangle.height = 20.f;///paras里取
[rectangle draw];
}
@end
使用
//
// ViewController.m
// LearnFacade
//
// Created by 印林泉 on 2017/3/5.
// Copyright © 2017年 ylq. All rights reserved.
//
#import "ViewController.h"
#import "Circle.h"
#import "Rectangle.h"
#import "ShapeMaker.h"
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
//[self simple];
[self facade];
}
- (void)facade {
///绘制一个圆的操作
[ShapeMaker drawCircleWithParas:@{@"a" : @"b"}];
///绘制圆 + 矩形操作
[ShapeMaker drawCircleAndRectangle:@{@"a" : @"b", @"c" : @"d"}];
}
- (void)simple {
///绘制了一个圆
Circle *circle = [Circle new];
circle.radius = 10.f;
[circle draw];
///绘制了一个矩形
Rectangle *rectangle = [Rectangle new];
rectangle.width = 10.f;
rectangle.height = 20.f;
[rectangle draw];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
