适配器模式
创建适配协议，创建抽象适配器类，创建类适配器/对象适配器。应用，适用场景
电源适配器，普通充电器（类适配器），苹果设备充电器（对象适配器）。输入电压，输出电压。
适配器协议
//
// AdapterProtocol.h
// LearnAdapter
//
// Created by 印林泉 on 2017/3/2.
// Copyright © 2017年 yiq. All rights reserved.
//
#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
@protocol AdapterProtocol <NSObject>
- (NSString *)name;
- (UIColor *)lineColor;
- (NSString *)phoneNumber;
@end
抽象适配器
//
// Adapter.h
// LearnAdapter
//
// Created by 印林泉 on 2017/3/2.
// Copyright © 2017年 yiq. All rights reserved.
//
#import <Foundation/Foundation.h>
#import "AdapterProtocol.h"
@interface Adapter : NSObject<AdapterProtocol>
///输入对象
@property (weak, nonatomic) id data;
///与输入对象建立联系
- (instancetype)initWithData:(id)data;
@end
//
// Adapter.m
// LearnAdapter
//
// Created by 印林泉 on 2017/3/2.
// Copyright © 2017年 yiq. All rights reserved.
//
#import "Adapter.h"
@implementation Adapter
- (instancetype)initWithData:(id)data {
self = [super init];
if (self) {
self.data = data;
}
return self;
}
- (NSString *)name {
return nil;
}
- (UIColor *)lineColor {
return nil;
}
- (NSString *)phoneNumber {
return nil;
}
@end
类适配器（ModelAdapter）
//
// Model.h
// LearnAdapter
//
// Created by 印林泉 on 2017/3/2.
// Copyright © 2017年 yiq. All rights reserved.
//
#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
@interface Model : NSObject
///名字
@property (retain, nonatomic) NSString *name;
///线条颜色
@property (retain, nonatomic) UIColor *lineColor;
///电话号码
@property (retain, nonatomic) NSString *phoneNumber;
@end
//
// ModelAdapter.h
// LearnAdapter
//
// Created by 印林泉 on 2017/3/3.
// Copyright © 2017年 yiq. All rights reserved.
//
#import "Adapter.h"
@interface ModelAdapter : Adapter
@end
//
// ModelAdapter.m
// LearnAdapter
//
// Created by 印林泉 on 2017/3/3.
// Copyright © 2017年 yiq. All rights reserved.
//
#import "ModelAdapter.h"
#import "Model.h"
@implementation ModelAdapter
- (instancetype)initWithData:(id)data {
self = [super init];
if (self) {
self.data = data;
}
return self;
}
- (NSString *)name {
Model *data = self.data;
return data.name;
}
- (UIColor *)lineColor {
Model *data = self.data;
return data.lineColor;
}
- (NSString *)phoneNumber {
Model *data = self.data;
return data.phoneNumber;
}
@end
类适配器（NewModelAdapter）
//
// NewModel.h
// LearnAdapter
//
// Created by 印林泉 on 2017/3/2.
// Copyright © 2017年 yiq. All rights reserved.
//
#import <Foundation/Foundation.h>
@interface NewModel : NSObject
///名字
@property (retain, nonatomic) NSString *name;
///线条颜色
@property (retain, nonatomic) NSString *lineColorHexString;
///电话号码
@property (retain, nonatomic) NSString *phoneNumber;
@end
//
// NewModelAdapter.h
// LearnAdapter
//
// Created by 印林泉 on 2017/3/3.
// Copyright © 2017年 yiq. All rights reserved.
//
#import "Adapter.h"
@interface NewModelAdapter : Adapter
@end
//
// NewModelAdapter.m
// LearnAdapter
//
// Created by 印林泉 on 2017/3/3.
// Copyright © 2017年 yiq. All rights reserved.
//
#import "NewModelAdapter.h"
#import "NewModel.h"
@implementation NewModelAdapter
- (instancetype)initWithData:(id)data {
self = [super init];
if (self) {
self.data = data;
}
return self;
}
- (NSString *)name {
NewModel *data = self.data;
return data.name;
}
- (UIColor *)lineColor {
NewModel *data = self.data;
//todo 简化
UIColor *color = nil;
if ([data.lineColorHexString isEqualToString:@"black"]) {
color = [UIColor blackColor];
}
else {
color = [UIColor redColor];
}
return color;
}
- (NSString *)phoneNumber {
NewModel *data = self.data;
return data.phoneNumber;
}
@end
对象适配器（ObjectAdapter）
//
// ObjectAdapter.h
// LearnAdapter
//
// Created by 印林泉 on 2017/3/3.
// Copyright © 2017年 yiq. All rights reserved.
//
#import "Adapter.h"
@interface ObjectAdapter : Adapter
@end
//
// ObjectAdapter.m
// LearnAdapter
//
// Created by 印林泉 on 2017/3/3.
// Copyright © 2017年 yiq. All rights reserved.
//
#import "ObjectAdapter.h"
#import "Model.h"
#import "NewModel.h"
@implementation ObjectAdapter
- (instancetype)initWithData:(id)data {
self = [super init];
if (self) {
self.data = data;
}
return self;
}
- (NSString *)name {
if ([self.data isMemberOfClass:[Model class]]) {
Model *data = self.data;
return data.name;
}
else if ([self.data isMemberOfClass:[NewModel class]]) {
NewModel *data = self.data;
return data.name;
}
else {
return nil;
}
}
- (UIColor *)lineColor {
if ([self.data isMemberOfClass:[Model class]]) {
Model *data = self.data;
return data.lineColor;
}
else if ([self.data isMemberOfClass:[NewModel class]]) {
NewModel *data = self.data;
UIColor *color = nil;
if ([data.lineColorHexString isEqualToString:@"black"]) {
color = [UIColor blackColor];
}
else {
color = [UIColor redColor];
}
return color;
}
else {
return nil;
}
}
- (NSString *)phoneNumber {
if ([self.data isMemberOfClass:[Model class]]) {
Model *model = self.data;
return model.phoneNumber;
}
else if ([self.data isMemberOfClass:[NewModel class]]) {
NewModel *model = self.data;
return model.phoneNumber;
}
else {
return nil;
}
}
@end
使用
//
// ViewController.m
// LearnAdapter
//
// Created by 印林泉 on 2017/3/2.
// Copyright © 2017年 yiq. All rights reserved.
//
#import "ViewController.h"
#import "View.h"
#import "Model.h"
#import "ModelAdapter.h"
#import "NewModel.h"
#import "NewModelAdapter.h"
#import "ObjectAdapter.h"
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
[self classAdapter];
[self objectAdapter];
}
- (void)classAdapter {
View *view = [[View alloc] initWithFrame:VIEW_FRAME];
Model *model = [[Model alloc] init];
model.name = @"yinlinqvan";
model.lineColor = [UIColor redColor];
model.phoneNumber = @"18721409352";
NewModel *newModel = [[NewModel alloc] init];
newModel.name = @"linda";
newModel.lineColorHexString = @"black";
newModel.phoneNumber = @"18721409352";
///与输入建立联系
Adapter *modelAdapter = [[ModelAdapter alloc] initWithData:model];
//Adapter *modelAdapter = [[NewModelAdapter alloc] initWithData:newModel];
///与输出建立联系
[view loadData:modelAdapter];
[self.view addSubview:view];
}
- (void)objectAdapter {
View *view = [[View alloc] initWithFrame:VIEW_FRAME_2];
Model *model = [[Model alloc] init];
model.name = @"linda";
model.lineColor = [UIColor redColor];
model.phoneNumber = @"18721409352";
NewModel *newModel = [[NewModel alloc] init];
newModel.name = @"linda";
newModel.lineColorHexString = @"black";
newModel.phoneNumber = @"18721409352";
///与输入建立联系
//Adapter *modelAdapter = [[ObjectAdapter alloc] initWithData:model];
Adapter *modelAdapter = [[ObjectAdapter alloc] initWithData:newModel];
///与输出建立联系
[view loadData:modelAdapter];
[self.view addSubview:view];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
review以前的代码，进行适当的改进。
