设计模式 - 适配器

适配器也叫接口适配，其目的是为了减少不同类型数据之间的耦合度而进行的数据转换，有利于减少冗余代码。

源码如下：

ModelCell.h 与 ModelCell.m

////  ModelCell.h//  Adapter////  Created by YouXianMing on 15/1/6.//  Copyright (c) 2015年 YouXianMing. All rights reserved.//#import 
    
     @interface ModelCell : UITableViewCell@property (nonatomic, strong) UILabel *name;@property (nonatomic, strong) UILabel *age;@end
    

////  ModelCell.m//  Adapter////  Created by YouXianMing on 15/1/6.//  Copyright (c) 2015年 YouXianMing. All rights reserved.//#import "ModelCell.h"@implementation ModelCell- (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {    if (self = [super initWithStyle:style reuseIdentifier:reuseIdentifier]) {                self.name           = [[UILabel alloc] initWithFrame:CGRectMake(10, 10, 200, 18)];        self.name.font      = [UIFont boldSystemFontOfSize:16.f];        self.name.textColor = [UIColor redColor];        [self addSubview:self.name];                self.age           = [[UILabel alloc] initWithFrame:CGRectMake(10, 18 + 10, 200, 14)];        self.age.font      = [UIFont italicSystemFontOfSize:12.f];        self.age.textColor = [UIColor blackColor];        [self addSubview:self.age];            }        return self;}@end

////  AdapterModel.h//  Adapter////  Created by YouXianMing on 15/1/6.//  Copyright (c) 2015年 YouXianMing. All rights reserved.//#import 
    
     @interface AdapterModel : NSObject@property (nonatomic, strong) NSString *name;@property (nonatomic, strong) NSString *age;/** *  根据字典来初始化 * *  @param dic model字典 * *  @return 实例对象 */+ (instancetype)adapterWithDictionary:(NSDictionary *)dic;/** *  根据对象来初始化 * *  @param dic model字典 * *  @return 实例对象 */+ (instancetype)adapterWithObject:(id)object;@end
    

////  AdapterModel.m//  Adapter////  Created by YouXianMing on 15/1/6.//  Copyright (c) 2015年 YouXianMing. All rights reserved.//#import "AdapterModel.h"@implementation AdapterModel+ (instancetype)adapterWithDictionary:(NSDictionary *)dic {        AdapterModel *model = nil;        if (dic != nil && [dic isKindOfClass:[NSDictionary class]]) {        model      = [AdapterModel new];        model.name = dic[@"name"];        model.age  = dic[@"age"];    }        return model;}+ (instancetype)adapterWithObject:(id)object {    // 预留        return [AdapterModel new];}@end

////  ViewController.m//  Adapter////  Created by YouXianMing on 15/1/6.//  Copyright (c) 2015年 YouXianMing. All rights reserved.//#import "ViewController.h"#import "ModelCell.h"#import "AdapterModel.h"static NSString *ModelCellFlag = @"ModelCell";@interface ViewController ()
    
     @property (nonatomic, strong) UITableView     *tableView;@property (nonatomic, strong) NSMutableArray  *dataArray;@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];        // 初始化数据源    [self createDataSource];        // 初始化tableView    [self createTableView];}#pragma mark - 数据源相关- (void)createDataSource {    self.dataArray = [NSMutableArray array];        [self.dataArray addObject:[AdapterModel adapterWithDictionary:@{@"name": @"FireEmblem",                                                                    @"age" : @"40"}]];        [self.dataArray addObject:[AdapterModel adapterWithDictionary:@{@"name": @"YouXianMing",                                                                    @"age" : @"27"}]];        [self.dataArray addObject:[AdapterModel adapterWithDictionary:@{@"name": @"QiuLiang",                                                                    @"age" : @"28"}]];        [self.dataArray addObject:[AdapterModel adapterWithDictionary:@{@"name": @"PingKang",                                                                    @"age" : @"25"}]];}#pragma mark - tableView相关- (void)createTableView {    self.tableView            = [[UITableView alloc] initWithFrame:self.view.bounds style:UITableViewStylePlain];    self.tableView.delegate   = self;    self.tableView.dataSource = self;    [self.tableView registerClass:[ModelCell class] forCellReuseIdentifier:ModelCellFlag];    [self.view addSubview:self.tableView];}#pragma mark row数量- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {    return self.dataArray.count;}#pragma mark cell初始化- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {        ModelCell *cell     = [tableView dequeueReusableCellWithIdentifier:ModelCellFlag];        AdapterModel *model = self.dataArray[indexPath.row];        cell.name.text      = model.name;    cell.age.text       = model.age;        return cell;}#pragma mark cell高度- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {    return 50;}@end
    

以下是核心代码处：