所谓适配器模式，通俗来讲就是比如每一个国家都有自己的电压和频率，中国大陆是 220V 和50Hz ，中国香港是230V和50Hz.这时就需要用到适配，在代码中我们也同样会用到，使用适配器可以解决不一致问题，让代码更有扩展性，可以降低数据层与视图成的耦合度。
- 创建抽象适配器对象
- 适配器与视图层建立输出联系
- 适配器与数据层建立输入联系
- 类适配器与对象适配器
首先规范一个protocol
#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
@protocol AdapterProtocol <NSObject>
- (NSString *)name;
- (UIColor *)lineColor;
- (NSString *)phoneNumber;
@end
然后让一个基类遵守该协议，这里就相当于一个接口
#import <Foundation/Foundation.h>
#import "AdapterProtocol.h"
@interface Adapter : NSObject<AdapterProtocol>
//输入的数据
@property(nonatomic,weak)id inputData;
- (instancetype)initWithData:(id)inputData;
@end
定义一个类继承于Adapter，这个类中实现了适配，但是同时达到了解耦的目的。
#import "SubviewAdapter.h"
#import "Model.h"
#import "Model2.h"
@implementation SubviewAdapter
#pragma mark- 重写父类的方法
- (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是两个对象，用对象来赋值比直接数据赋值要更灵活直观不易出错
以上其实都是实现了数据的输入，现在需要把输入的数据进行赋值显示出来
#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 加载实现了AdapterProtocol协议的对象
- (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
最后在主控制器中写上逻辑代码
Model *model = [[Model alloc]init];
model.name = @"John";
model.phoneNum = @"372-432-11";
model.lineColor = [UIColor lightGrayColor];
//输入的数据源
SubviewAdapter *subAdapter = [[SubviewAdapter alloc]initWithData:model];
//输出
AdapterView *adapterView = [[AdapterView alloc]initWithFrame:CGRectMake(0, 0, 200, 130)];
adapterView.center = self.view.center;
[adapterView initWithInputData:subAdapter];
[self.view addSubview:adapterView];
总结来说也就是：
- 首先定义一个公共的接口（吃，跑）
- 让一个基类去实现这些接口（吃，跑）
- 创建一个子类继承与上面的基类，这里面重写接口的方法。（怎么吃，怎么跑），如果想要增加新的功能，就只需要在子类中新增一个方法（飞），就跟适配器一样，只要有不同的频率和电压出现，额外新增一个就OK了。
- 把输入的数据赋值 跟
tableViewCell赋值的方法一样
