iOS 一一 自定义cell按钮的点击事件(通知机制)

使用通知机制来实现 自定义cell按钮的点击事件.使用通知机制来实现,没有使用代理的方式规范.

代理方式的链接:  http://blog.csdn.net/m0_37989980/article/details/77407073

1. 当点击cell上面的按钮. 发布通知

2. 在控制器的viewDidLoad方法中监听通知.实现监听通知的方法

3. 移除通知

代码如下:

ZYOperationButton文件

#import <UIKit/UIKit.h>// 自定义按钮@interface ZYOperationButton : UIButton@end@implementation ZYOperationButton// 当从storyboard中或xib中加载完后会调用这个方法.\    awakeFromNib是在viewDidLoad之前发生的。就是如果想要对view本身进行一些例如背景颜色，透明度之类的设置就只能在awakeFromNib里面进行，因为view被load之后再改就来不及了，所以只能在view被load之前进行设置，就是awakeFromNib。- (void)awakeFromNib{    [super awakeFromNib];    // 设置边框的宽度    self.layer.borderWidth = 1.0f;    // 设置边框颜色    self.layer.borderColor = [UIColor orangeColor].CGColor;    // 设置圆角半径    self.layer.cornerRadius = self.frame.size.width * 0.5;    }@end

ZYWine文件

#import <Foundation/Foundation.h>@interface ZYWine : NSObject/** 图片名 */@property (nonatomic, copy) NSString *image;/** 酒的名字 */@property (nonatomic, copy) NSString *name;/** 价格 */@property (nonatomic, copy) NSString *money;/** 购买数 */@property(nonatomic,assign) int count;@end@implementation ZYWine@end

ZYWineCell文件

#import <UIKit/UIKit.h>@class ZYWine;@interface ZYWineCell : UITableViewCell/** 酒模型 */@property(nonatomic,strong)ZYWine * wine;@end#import "ZYWine.h"@interface ZYWineCell ()@property (weak, nonatomic) IBOutlet UIImageView *icon;@property (weak, nonatomic) IBOutlet UILabel *title_Label;@property (weak, nonatomic) IBOutlet UILabel *price_Label;/** 购买数 */@property (weak, nonatomic) IBOutlet UILabel *buyCount;@property (weak, nonatomic) IBOutlet UIButton *minusBtn;@end@implementation ZYWineCell- (void)awakeFromNib{    [super awakeFromNib];    // 当加载完storyboard的时候,把减号按钮设为不可点击    self.minusBtn.enabled = NO;}- (void)setWine:(ZYWine *)wine{    // 通过酒数据模型设置数据    _wine = wine;    self.icon.image = [UIImage imageNamed:wine.image];    self.title_Label.text = wine.name;    self.price_Label.text = [NSString stringWithFormat:@"¥%@",wine.money];        // 根据count决定buyCount显示的文字    self.buyCount.text = [NSString stringWithFormat:@"%d",wine.count];        // 根据count决定减号按钮是否能点击    self.minusBtn.enabled = (wine.count > 0);}#pragma -mark 按钮点击事件// 这样做的好处: 降低了耦合度,cell和控制器的关联不太大,如果在其他地方要使用到cell,监听cell的通知就可以了- (IBAction)addBtnClick {        //1. 当点击添加按钮,buyCount增加    self.wine.count ++;        //2. 修改界面(通过新的模型来修改界面)\    因为在cell里面不能使用self.tableView reloadData 刷新数据\    刷新数据的本质就是重新调用数据源方法,通过新的模型设置新的数据,既然如此,我们可以直接在内部通过\    使用新的模型来设置数据    self.buyCount.text = [NSString stringWithFormat:@"%d",self.wine.count];        //3. 当点击添加按钮的时候,使减号按钮可以点击    self.minusBtn.enabled = YES;        //4. 发布通知    // 发布者是当前的ZYWineCell    NSNotification *note = [NSNotification notificationWithName:@"addButtonNotificationCenter" object:self userInfo:nil];    [[NSNotificationCenter defaultCenter] postNotification:note];    }- (IBAction)minusBtnClick {        //1.    self.wine.count --;    //2.    self.buyCount.text = [NSString stringWithFormat:@"%d",self.wine.count];        //3. 当buyCount为0,的时候,设置删除按钮为不可点    if (self.wine.count == 0) {        self.minusBtn.enabled = NO;    }        //4. 发布通知    [[NSNotificationCenter defaultCenter] postNotificationName:@"minusButtonNotificationCenter" object:self userInfo:nil];}@end

ViewController文件

#import <UIKit/UIKit.h>@interface ViewController : UIViewController@end#import "ZYWineCell.h"#import "MJExtension.h"#import "ZYWine.h"@interface ViewController () <UITableViewDataSource>@property (weak, nonatomic) IBOutlet UITableView *tableView;/** 装所有的酒模型的数组 */@property (nonatomic,strong) NSArray *wineArray;@property (weak, nonatomic) IBOutlet UILabel *totalPrice;@property (weak, nonatomic) IBOutlet UIButton *buyButton;@property (weak, nonatomic) IBOutlet UIButton *clearButton;@end@implementation ViewController// 懒加载- (NSArray *)wineArray{    if (_wineArray == nil) {        _wineArray = [ZYWine mj_objectArrayWithFilename:@"wine.plist"];    }    return _wineArray;}- (void)viewDidLoad {    [super viewDidLoad];        // 监听加号按钮的通知    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(addBtnAction:) name:@"addButtonNotificationCenter" object:nil];        // 监听减号按钮的通知    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(minusBtnAction:) name:@"minusButtonNotificationCenter" object:nil];        // 设置一开始没有购买的时候.清除购物车,购买按钮为不可点击    self.clearButton.enabled = NO;    self.buyButton.enabled = NO;    }#pragma -mark 移除监听- (void)dealloc{    // 移除控制器中的所有监听    [[NSNotificationCenter defaultCenter] removeObserver:self];}#pragma -mark 监听通知的方法- (void)addBtnAction :(NSNotification *)note{    //1. 拿到当前cell对象    ZYWineCell *cell = note.object;    //2. 计算总价格(view上的价格 + 酒的价格)    int totalMoney = self.totalPrice.text.intValue + cell.wine.money.intValue;    //3. 设置总价格(int类型转为NSString类型)    self.totalPrice.text = [NSString stringWithFormat:@"%d",totalMoney];        //4. 当监听到加号按钮点击的时候,设置buyButton,clearButton为可点击    self.buyButton.enabled = YES;    self.clearButton.enabled = YES;}- (void)minusBtnAction :(NSNotification *)note{    //1. 拿到当前cell对象    ZYWineCell *cell = note.object;    //2. 计算总价格    int totalMoney = self.totalPrice.text.intValue - cell.wine.money.intValue;    //3. 设置总价格(int类型转为NSString类型)    self.totalPrice.text = [NSString stringWithFormat:@"%d",totalMoney];        //4. 当监听到减号按钮点击的时候,设置buyButton,clearButton为可点击    self.buyButton.enabled = totalMoney > 0;    self.clearButton.enabled = totalMoney > 0;}#pragma -mark 按钮的点击事件- (IBAction)clearBtn {    //1. 把totalPrice设为0    self.totalPrice.text = @"0";    //2. 遍历所有的模型,把模型的count设为0    for (ZYWine *wine in self.wineArray) {        wine.count = 0;    }    //3. 刷新表格    [self.tableView reloadData];        //4. 当点击清空购物车按钮后,设置buyButton,clearButton设为不可点击    self.buyButton.enabled = NO;    self.clearButton.enabled = NO;    }- (IBAction)buyBtn {        // 当点击购买按钮的时候.打印购买酒的信息    for (ZYWine *wine in self.wineArray) {        if (wine.count) { // 哪个数据模型的count不为0            NSLog(@"您购买了%d瓶%@",wine.count,wine.name);        }    }        }#pragma -mark  UITableViewDataSource- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{    return self.wineArray.count;}- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{    static NSString *ID = @"wine";    ZYWineCell *cell = [tableView dequeueReusableCellWithIdentifier:ID];        // 设置数据    cell.wine = self.wineArray[indexPath.row];        return cell;}@end