所謂適配器模式，通俗來講就是比如每一個國家都有自己的電壓和頻率，中國大陸是 220V 和50Hz ，中國香港是230V和50Hz.這時就需要用到適配，在代碼中我們也同樣會用到，使用適配器可以解決不一致問題，讓代碼更有擴(kuò)展性，可以降低數(shù)據(jù)層與視圖成的耦合度。

• 創(chuàng)建抽象適配器對象
• 適配器與視圖層建立輸出聯(lián)系
• 適配器與數(shù)據(jù)層建立輸入聯(lián)系
• 類適配器與對象適配器

首先規(guī)范一個protocol

#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>

@protocol AdapterProtocol <NSObject>

- (NSString *)name;
- (UIColor *)lineColor;
- (NSString *)phoneNumber;

@end

然后讓一個基類遵守該協(xié)議，這里就相當(dāng)于一個接口

#import <Foundation/Foundation.h>
#import "AdapterProtocol.h"

@interface Adapter : NSObject<AdapterProtocol>
//輸入的數(shù)據(jù)
@property(nonatomic,weak)id  inputData;
- (instancetype)initWithData:(id)inputData;

@end

定義一個類繼承于Adapter，這個類中實(shí)現(xiàn)了適配，但是同時達(dá)到了解耦的目的。

#import "SubviewAdapter.h"
#import "Model.h"
#import "Model2.h"
@implementation SubviewAdapter

#pragma mark- 重寫父類的方法
- (NSString *)name {
    NSString *name ;
    if ([self.inputData isKindOfClass:[Model class]]) {
        Model *model = self.inputData;
        name = model.name;
    }else if ([self.inputData isKindOfClass:[Model2 class]]){
        Model2 *model2 = self.inputData;
        name = model2.name;
    }
    return name;
}

- (UIColor *)lineColor {
    UIColor *lineColor;
    if ([self.inputData isKindOfClass:[Model class]]) {
        Model *model = self.inputData;
        lineColor = model.lineColor;
    }else if ([self.inputData isKindOfClass:[Model2 class]]){
        Model2 *modal2 = self.inputData;
        lineColor = modal2.lineColor;
    }
    return lineColor;
}

- (NSString *)phoneNumber{
    NSString *phoneNum;
    if ([self.inputData isKindOfClass:[Model class]]) {
        Model *model = self.inputData;
        phoneNum = model.phoneNum;
    }else if ([self.inputData isKindOfClass:[Model2 class]]){
        Model2 *model2 = self.inputData;
        phoneNum = model2.phoneNum;
    }
    return phoneNum;
}
@end

其中Model和Model2是兩個對象，用對象來賦值比直接數(shù)據(jù)賦值要更靈活直觀不易出錯
以上其實(shí)都是實(shí)現(xiàn)了數(shù)據(jù)的輸入，現(xiàn)在需要把輸入的數(shù)據(jù)進(jìn)行賦值顯示出來

#import <UIKit/UIKit.h>
#import "AdapterProtocol.h"

@interface AdapterView : UIView

@property(nonatomic,copy)NSString *name;
@property(nonatomic,copy)NSString *phoneNum;
@property(nonatomic,strong) UIColor *lineColor;
//初始化  加載實(shí)現(xiàn)了AdapterProtocol協(xié)議的對象
- (void)initWithInputData:(id <AdapterProtocol>)inputData;
@end

#import "AdapterView.h"

@interface AdapterView ()
@property(nonatomic,strong)UILabel *nameLabel;
@property(nonatomic,strong)UILabel *phoneLabel;
@property(nonatomic,strong)UIView *lineView;
@end

@implementation AdapterView

- (instancetype)initWithFrame:(CGRect)frame {
    if (self  = [super initWithFrame:frame]) {
        
    }
    return self;
}

- (void)setupUI{
    
    self.backgroundColor     = [UIColor whiteColor];
    self.layer.borderWidth   = 0.5f;
    self.layer.shadowOpacity = 0.5f;
    self.layer.shadowOffset  = CGSizeMake(5, 5);
    self.layer.shadowRadius  = 1.f;
    self.layer.shadowColor   = [UIColor grayColor].CGColor;
    
    //name
    self.nameLabel      = [[UILabel alloc] initWithFrame:CGRectMake(15, 10, 150, 25)];
    self.nameLabel.font = [UIFont fontWithName:@"Avenir-Light" size:20.f];
    self.nameLabel.text = self.name;
    [self addSubview:self.nameLabel];
    
    //lineView
    self.lineView = [[UIView alloc] initWithFrame:CGRectMake(0, 45, 200, 5)];
    self.lineView.backgroundColor = self.lineColor;
    [self addSubview:self.lineView];
    
    //phoneLabel
    self.phoneLabel  = [[UILabel alloc] initWithFrame:CGRectMake(41, 105, 150, 20)];
    self.phoneLabel.textAlignment = NSTextAlignmentRight;
    self.phoneLabel.font = [UIFont fontWithName:@"AvenirNext-UltraLightItalic" size:16.f];
    self.phoneLabel.text = self.phoneNum;
    [self addSubview:self.phoneLabel];
}

- (void)initWithInputData:(id <AdapterProtocol>)inputData{
    
    self.name = [inputData name];
    self.lineColor = [inputData lineColor];
    self.phoneNum = [inputData phoneNumber];
    [self setupUI];
 
}

@end

最后在主控制器中寫上邏輯代碼

Model *model = [[Model alloc]init];
    model.name = @"John";
    model.phoneNum = @"372-432-11";
    model.lineColor = [UIColor lightGrayColor];
    
    //輸入的數(shù)據(jù)源
    SubviewAdapter *subAdapter = [[SubviewAdapter alloc]initWithData:model];
    
    //輸出
    AdapterView *adapterView = [[AdapterView alloc]initWithFrame:CGRectMake(0, 0, 200, 130)];
    adapterView.center = self.view.center;
    [adapterView initWithInputData:subAdapter];
    
    [self.view addSubview:adapterView];

總結(jié)來說也就是：

• 首先定義一個公共的接口（吃，跑）
• 讓一個基類去實(shí)現(xiàn)這些接口（吃，跑）
• 創(chuàng)建一個子類繼承與上面的基類，這里面重寫接口的方法。（怎么吃，怎么跑），如果想要增加新的功能，就只需要在子類中新增一個方法（飛），就跟適配器一樣，只要有不同的頻率和電壓出現(xiàn)，額外新增一個就OK了。
• 把輸入的數(shù)據(jù)賦值 跟tableViewCell賦值的方法一樣