用适配器模式处理复杂的UITableView中cell的业务逻辑

适配器是用来隔离数据源对cell布局影响而使用的,cell只接受适配器的数据,而不会与外部数据源进行交互.

源码:

ModelCell.h 与 ModelCell.m

////  ModelCell.h//  Adapter////  Created by XianMingYou on 15/2/10.//  Copyright (c) 2015年 XianMingYou. All rights reserved.//#import 
     
      #define NAME_FRAME  CGRectMake(15, 15, 290, 20)#define NAME_FONT   [UIFont boldSystemFontOfSize:18.f]#define ADDRESS_FRAME CGRectMake(15, 15 + 30, 290, 20)#define ADDRESS_FONT  [UIFont systemFontOfSize:14.f]#define DESCRIBE_FRAME CGRectMake(15, 15 + 60, 290, 20)#define DESCRIBE_FONT  [UIFont italicSystemFontOfSize:14.f]@interface ModelCell : UITableViewCell/** *  适配器处理逻辑的地方 * *  @param adapter 适配器 */- (void)accessModelAdapter:(id)adapter;@end
     

////  ModelCell.m//  Adapter////  Created by XianMingYou on 15/2/10.//  Copyright (c) 2015年 XianMingYou. All rights reserved.//#import "ModelCell.h"#import "ModelAdapter.h"#import "UIView+SetRect.h"@interface ModelCell ()@property (nonatomic, strong) UILabel *name;          // 名字@property (nonatomic, strong) UILabel *address;       // 地址@property (nonatomic, strong) UILabel *describeInfo;  // 描述信息@end@implementation ModelCell- (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {    if (self = [super initWithStyle:style reuseIdentifier:reuseIdentifier]) {        [self createView];    }        return self;}- (void)createView {    self.name                   = [[UILabel alloc] initWithFrame:NAME_FRAME];    self.name.font              = NAME_FONT;    self.name.numberOfLines     = 0.f;    self.name.textColor         = [UIColor redColor];    [self addSubview:self.name];        self.address                   = [[UILabel alloc] initWithFrame:ADDRESS_FRAME];    self.address.font              = ADDRESS_FONT;    self.address.numberOfLines     = 0.f;    [self addSubview:self.address];        self.describeInfo                   = [[UILabel alloc] initWithFrame:DESCRIBE_FRAME];    self.describeInfo.font              = DESCRIBE_FONT;    self.describeInfo.numberOfLines     = 0.f;    self.describeInfo.textColor         = [UIColor grayColor];    self.describeInfo.textAlignment     = NSTextAlignmentRight;    [self addSubview:self.describeInfo];}- (void)accessModelAdapter:(id)adapter {        ModelAdapter *dataAdapter = adapter;        self.name.text         = dataAdapter.name;    self.name.frame        = NAME_FRAME;    [self.name sizeToFit];        self.address.text      = dataAdapter.address;    self.address.frame     = ADDRESS_FRAME;    [self.address sizeToFit];        self.describeInfo.text  = dataAdapter.describeInfo;    self.describeInfo.frame = DESCRIBE_FRAME;    [self.describeInfo sizeToFit];    self.describeInfo.x     = 320 - self.describeInfo.width - 10;        self.address.y      = NAME_FRAME.origin.y + dataAdapter.nameHeight;    self.describeInfo.y = self.address.y + dataAdapter.addressHeight;}@end

ModelAdapter.h 与 ModelAdapter.m

////  ModelAdapter.h//  Adapter////  Created by XianMingYou on 15/2/10.//  Copyright (c) 2015年 XianMingYou. All rights reserved.//#import 
     
      #import 
      
       @interface ModelAdapter : NSObject@property (nonatomic, strong) NSString *name;@property (nonatomic, strong) NSString *address;@property (nonatomic, strong) NSString *describeInfo;// 初始化适配器- (instancetype)initWithData:(id)data;#pragma mark 只读属性@property (nonatomic, readonly) CGFloat nameHeight;@property (nonatomic, readonly) CGFloat addressHeight;@property (nonatomic, readonly) CGFloat describeInfoHeight;@property (nonatomic, readonly) CGFloat totalHeight;@end
      
     

设置frame值用的类

UIView+SetRect.h 与 UIView+SetRect.m

////  UIView+SetRect.h//  TestPch////  Created by YouXianMing on 14-12-26.//  Copyright (c) 2014年 YouXianMing. All rights reserved.//#import 
     
      @interface UIView (SetRect)// Frame@property (nonatomic) CGPoint viewOrigin;@property (nonatomic) CGSize  viewSize;// Frame Origin@property (nonatomic) CGFloat x;@property (nonatomic) CGFloat y;// Frame Size@property (nonatomic) CGFloat width;@property (nonatomic) CGFloat height;// Frame Borders@property (nonatomic) CGFloat top;@property (nonatomic) CGFloat left;@property (nonatomic) CGFloat bottom;@property (nonatomic) CGFloat right;// Center Point#if !IS_IOS_DEVICE@property (nonatomic) CGPoint center;#endif@property (nonatomic) CGFloat centerX;@property (nonatomic) CGFloat centerY;// Middle Point@property (nonatomic, readonly) CGPoint middlePoint;@property (nonatomic, readonly) CGFloat middleX;@property (nonatomic, readonly) CGFloat middleY;@property (nonatomic, assign) CGFloat cornerRadius ;@property (nonatomic ,assign) BOOL round ;@end
     

////  UIView+SetRect.m//  TestPch////  Created by YouXianMing on 14-12-26.//  Copyright (c) 2014年 YouXianMing. All rights reserved.//#import "UIView+SetRect.h"@implementation UIView (SetRect)#pragma mark Frame- (CGPoint)viewOrigin{    return self.frame.origin;}- (void)setViewOrigin:(CGPoint)newOrigin{    CGRect newFrame = self.frame;    newFrame.origin = newOrigin;    self.frame = newFrame;}- (CGSize)viewSize{    return self.frame.size;}- (void)setViewSize:(CGSize)newSize{    CGRect newFrame = self.frame;    newFrame.size = newSize;    self.frame = newFrame;}#pragma mark Frame Origin- (CGFloat)x{    return self.frame.origin.x;}- (void)setX:(CGFloat)newX{    CGRect newFrame = self.frame;    newFrame.origin.x = newX;    self.frame = newFrame;}- (CGFloat)y{    return self.frame.origin.y;}- (void)setY:(CGFloat)newY{    CGRect newFrame = self.frame;    newFrame.origin.y = newY;    self.frame = newFrame;}#pragma mark Frame Size- (CGFloat)height{    return self.frame.size.height;}- (void)setHeight:(CGFloat)newHeight{    CGRect newFrame = self.frame;    newFrame.size.height = newHeight;    self.frame = newFrame;}- (CGFloat)width{    return self.frame.size.width;}- (void)setWidth:(CGFloat)newWidth{    CGRect newFrame = self.frame;    newFrame.size.width = newWidth;    self.frame = newFrame;}#pragma mark Frame Borders- (CGFloat)left{    return self.x;}- (void)setLeft:(CGFloat)left{    self.x = left;}- (CGFloat)right{    return self.frame.origin.x + self.frame.size.width;}- (void)setRight:(CGFloat)right{    self.x = right - self.width;}- (CGFloat)top{    return self.y;}- (void)setTop:(CGFloat)top{    self.y = top;}- (CGFloat)bottom{    return self.frame.origin.y + self.frame.size.height;}- (void)setBottom:(CGFloat)bottom{    self.y = bottom - self.height;}#pragma mark Center Point#if !IS_IOS_DEVICE- (CGPoint)center{    return CGPointMake(self.left + self.middleX, self.top + self.middleY);}- (void)setCenter:(CGPoint)newCenter{    self.left = newCenter.x - self.middleX;    self.top = newCenter.y - self.middleY;}#endif- (CGFloat)centerX{    return self.center.x;}- (void)setCenterX:(CGFloat)newCenterX{    self.center = CGPointMake(newCenterX, self.center.y);}- (CGFloat)centerY{    return self.center.y;}- (void)setCenterY:(CGFloat)newCenterY{    self.center = CGPointMake(self.center.x, newCenterY);}#pragma mark Middle Point- (CGPoint)middlePoint{    return CGPointMake(self.middleX, self.middleY);}- (CGFloat)middleX{    return self.width / 2;}- (CGFloat)middleY{    return self.height / 2;}- (void)setCornerRadius:(CGFloat)cornerRadius{    self.layer.masksToBounds = YES ;    self.layer.cornerRadius = cornerRadius ;}- (void)setRound:(BOOL)round{    [self setCornerRadius:self.height/2];}- (CGFloat)cornerRadius{    return  self.layer.cornerRadius ;}- (BOOL)round{    return NO ;}@end

控制器源码:

////  ViewController.m//  Adapter////  Created by XianMingYou on 15/2/10.//  Copyright (c) 2015年 XianMingYou. All rights reserved.//#import "ViewController.h"#import "ModelCell.h"#import "ModelAdapter.h"#define REUSE_MODEL_CELL  @"ModelCell"@interface ViewController ()
     
      @property (nonatomic, strong) UITableView  *tableView;@property (nonatomic, strong) NSArray      *dataArray;@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];    // 创建数据源    [self createDataSource];        // 创建tableView    [self createTableView];}#pragma mark - 数据源- (void)createDataSource {    ModelAdapter *data1 = [[ModelAdapter alloc] initWithData:@{
   @"name"         : @"YouXianMing",                                                               @"address"      : @"北京通州区果园地铁站附近",                                                               @"describeInfo" : @"iOS Developer"}];    ModelAdapter *data2 = [[ModelAdapter alloc] initWithData:@{
   @"name"         : @"QiuLiang",                                                               @"address"      : @"上海浦东XXXX开发园区,德望路园丁小区福星楼7123左侧34桌",                                                               @"describeInfo" : @".Net Developer"}];    ModelAdapter *data3 = [[ModelAdapter alloc] initWithData:@{
   @"name"         : @"",                                                               @"address"      : @"上海浦东XXXX开发园区,德望路园丁小区福星楼7123左侧34桌",                                                               @"describeInfo" : @".Net Developer"}];    ModelAdapter *data4 = [[ModelAdapter alloc] initWithData:@{
   @"name"         : @"YouXianMing",                                                               @"address"      : @"",                                                               @"describeInfo" : @"C++ Developer"}];    self.dataArray = @[data1, data2, data3, data4];}#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:REUSE_MODEL_CELL];    [self.view addSubview:self.tableView];}#pragma mark row的数目- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {    return self.dataArray.count;}#pragma mark 初始化cell- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {    ModelCell *cell = [tableView dequeueReusableCellWithIdentifier:REUSE_MODEL_CELL];    [cell accessModelAdapter:self.dataArray[indexPath.row]];        return cell;}#pragma mark cell高度- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {    ModelAdapter *adapter = self.dataArray[indexPath.row];    return adapter.totalHeight;}@end
     

简单的分析:

1) 适配器与cell中的控件数据一一对应

2) 重写适配器中的只读属性实现懒加载

3) 适配器与cell共用一部分cell的控件属性,用以方便修改

4) 适配器可以随时切换数据类型

5) 用适配器处理业务逻辑