购物车界面，不同section，点击增减物品，确定取消选中的逻辑判断

1、首先在自定义的cell中，创建两个代理方法

@protocol shopCartDelegate <NSObject>

-(void)shopCartDelegate:(ShopCartCell *)cell WithBtn:(UIButton *)btn;

-(void)shopCartDelegateNum:(ShopCartCell *)cell WithBtn:(UIButton *)btn;

@end

@interface ShopCartCell : UITableViewCell

@property(nonatomic,assign)id<shopCartDelegate>delegate;

@end

2、在viewcontroller中实现这两个代理方法

shopCell.delegate = self;//遵循代理

方法实现

(1)选中和取消的代理方法

-(void)shopCartDelegate:(ShopCartCell *)cell WithBtn:(UIButton *)btn

{

NSIndexPath *indexPath =[self.tableView indexPathForCell:cell];

int couss=0 ;

NSArray *array =self.array[indexPath.section];

for (int i =0; i<array.count; i++) {

ShopModel *model =array[i];

if (i==indexPath.row) {

if (btn.selected) {

model.isSelected = @"true";

}else{

model.isSelected = @"false";

}

}

if ([model.isSelected isEqualToString:@"true"]) {

couss++;

}

}

//判断section内的cell是否都被选中

if (couss == array.count) {

self.isonOff = NO;

}else{

self.isonOff = YES;

}

[self.tableView reloadData];

}

（2）增加减少

-(void)shopCartDelegateNum:(ShopCartCell *)cell WithBtn:(UIButton *)btn

{

NSIndexPath *indexPath =[self.tableView indexPathForCell:cell];

NSArray *array =self.array[indexPath.section];

for (int i =0; i<array.count; i++) {

ShopModel *model =array[i];

if (i==indexPath.row) {

if (btn.tag == 2000) {

model.num =[NSString stringWithFormat:@"%d",model.num.intValue+1];

}else{

if (model.num.intValue == 1) {

}else{

model.num =[NSString stringWithFormat:@"%d",model.num.intValue-1];

}

}

}

}

[self.tableView reloadData];

}