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
// 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#import
@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#import
@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#import
@interface ViewController : UIViewController
@end
#import "ZYWineCell.h"
#import "MJExtension.h"
#import "ZYWine.h"
@interface ViewController ()
@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
