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 
 
 
-(void)shopCartDelegate:(ShopCartCell *)cell WithBtn:(UIButton *)btn;
 -(void)shopCartDelegateNum:(ShopCartCell *)cell WithBtn:(UIButton *)btn;
 
 
@end
 
 
@interface ShopCartCell : UITableViewCell
 @property(nonatomic,assign)iddelegate;
 @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];
 
 
}