首页图
上次写完购物车精简版被编辑推荐到了首页,得到许多朋友关注,评论区小伙伴建议做一个完整版.于是利用闲暇时间新增了一些功能:
- 数量加减
- 可点击textField修改,也可以加减按钮修改
- 全选按钮
github代码:https://github.com/zhYes/YSShoppingCar-Complite.git
全选按钮逻辑效果:
全选效果展示
part one 全选按钮有关代码
代理方法1中伪代码:
#pragma mark - cell上的代理方法
- (void)shopCellSelectedClick:(NSInteger)shopCellTag {
....
///插入判断代码
//判断 //cell改变组头 //组头改变全选
NSInteger selectedNum = 0 ;
for (MKOrderListModel * tempListModel in _modelArray) {//遍历所有组
if (tempListModel.groupSelected) {//如果组头是选中的
selectedNum += 1;
}
if (selectedNum == _modelArray.count) {
allSelectBtn.selected = YES;
}
}
} else {
listModel.groupSelected = NO;
allSelectBtn.selected = NO;
}
....
}
cell的选中增加了判断代码,决定全选按钮的状态
完整代码:
#pragma mark - cell上的代理方法获 | 取的价格
- (void)shopCellSelectedClick:(NSInteger)shopCellTag {
//判断组的是否选中状态是否修改
NSString * cellTagStr = [NSString stringWithFormat:@"%zd",shopCellTag];
NSIndexPath *indexPath = self.dic[cellTagStr];
MKOrderListModel * listModel = (MKOrderListModel*)_modelArray[indexPath.section];
//0.便利当前组cell上选中按钮的个数
NSInteger seletedNum =0;
for (MKGoodsModel* goodsModel in listModel.goods) {
if (goodsModel.isSelected) {
seletedNum += 1;
}
// 1.当前组的cell的个数 是否等于 勾选的总数
if (((MKOrderListModel*)_modelArray[indexPath.section]).goods.count == seletedNum) {
listModel.groupSelected = YES; //cell改变组头变为选中
//判断 //cell改变组头 //组头改变全选
NSInteger selectedNum = 0 ;
for (MKOrderListModel * tempListModel in _modelArray) {//遍历所有组
if (tempListModel.groupSelected) {//如果组头是选中的
selectedNum += 1;
}
if (selectedNum == _modelArray.count) {
allSelectBtn.selected = YES;
}
}
} else {
listModel.groupSelected = NO;
allSelectBtn.selected = NO;
}
[_tableView reloadData];
}
MKGoodsModel *goodsModel = ((MKOrderListModel*)_modelArray[indexPath.section]).goods[indexPath.row];
float goods_price = goodsModel.goods_price;
float goods_number = goodsModel.goods_number;
if (!goodsModel.isSelected) {
_totalNum = _totalNum - goods_price*goods_number;
// NSLog(@"%.2f",_totalNum);
}else {
_totalNum = _totalNum + goods_price*goods_number;
// NSLog(@"%.2f",_totalNum);
}
_hejiLabel.text = [NSString stringWithFormat:@"¥%.2f",_totalNum -1 + 1];
if ([_hejiLabel.text containsString:@"-"]) {
_hejiLabel.text = @"¥0.0";
}
}
当前cell选中时候,当前组头也选中的时候,判断当前所有选中组的个数是否等于全部组数
代理方法2中伪代码:
#pragma mark - 代理方法组头header的选中状态
- (void)headerSelectedBtnClick:(NSInteger)section {
...
插入判断
// 判断如果点击 | header选中
if (listModel.groupSelected) {
// /// 判断组头的点击改变全选按钮
NSInteger tempGroupSelectNum = 0;
for (MKOrderListModel *model in _modelArray) {
if (model.groupSelected) {
tempGroupSelectNum ++;
}
if (tempGroupSelectNum == _modelArray.count) {
allSelectBtn.selected = YES;
}
}
...
}
数组的选中按钮中增加判断
完整代码:
#pragma mark - 代理方法组头header的选中状态
- (void)headerSelectedBtnClick:(NSInteger)section {
// NSLog(@"%zd",section);
MKOrderListModel*listModel = _modelArray[section];
listModel.groupSelected = !listModel.groupSelected;
// 判断如果点击 | header选中
if (listModel.groupSelected) {
// /// 判断组头的点击改变全选按钮
NSInteger tempGroupSelectNum = 0;
for (MKOrderListModel *model in _modelArray) {
if (model.groupSelected) {
tempGroupSelectNum ++;
}
if (tempGroupSelectNum == _modelArray.count) {
allSelectBtn.selected = YES;
}
}
for (MKGoodsModel* goodsModel in listModel.goods) {
if (!goodsModel.isSelected) { //下面不是选中状态的cell 将价格加入到总价当中
float goods_price = goodsModel.goods_price; //价格
float goods_number = goodsModel.goods_number; // 数量
_totalNum += goods_price * goods_number;
goodsModel.isSelected = YES;
}
}
} else { // 取消header选中 所有都取消
//全选按钮变为不选中
allSelectBtn.selected = NO;
for (MKGoodsModel* goodsModel in listModel.goods) {
goodsModel.isSelected = NO;
float goods_price = goodsModel.goods_price; //价格
float goods_number = goodsModel.goods_number; // 数量
_totalNum -= goods_price * goods_number;
}
}
// NSLog(@"总价格为: %.2f",_totalNum);
_hejiLabel.text = [NSString stringWithFormat:@"¥%.2f",_totalNum - 1 + 1];
if ([_hejiLabel.text containsString:@"-"]) {
_hejiLabel.text = @"0";
}
[_tableView reloadData];
}
全选按钮的点击处理:
/// MARK: 全选的点击事件
- (void)allSelectBtnClick: (UIButton*)allSelectedBtn{
allSelectedBtn.selected = !allSelectedBtn.selected; // 修改全选按钮的状态
if (allSelectedBtn.selected) { // 如果全选按钮改变了为选中
for (int i = 0; i <_modelArray.count; i ++) {
MKOrderListModel * listModel = _modelArray[i];
if (!listModel.groupSelected) {//遍历如果组不是选中状态
[self headerSelectedBtnClick:i]; //模拟组头点击了一次
}
}
}else { // 全选按钮改变为不选中 那么所有商品都不选中!
for (int i = 0; i < _modelArray.count; i ++) { // 遍历所有的组头点击
[self headerSelectedBtnClick:i];
}
}
}
点击全选,按钮状态取反
取反后,全选按钮是选中,则遍历所有组把所有未选中的组头做一次点击操作
取反后,全选按钮是未选中,则所有组头做一次点击操作即可
修改数量效果展示:
修改数量效果
part two 修改数量相关代码:
关于购物车中textField的逻辑代码可查看我的另一篇记用了12个if做的textField输入框的变态需求
这里贴一下数量加减的代码:
/// MARK:数量增加按钮
- (IBAction)plusBtnClick {
if (_ex_buynum_texField.editing) {
return;
}
// 保存之前值
float beforeBuyNum = _goodsModel.goods_number;
// 判断不能大于20
if (_ex_buynum_texField.text.floatValue == 20) {
return;
}
/// 修改模型数据
_ex_buynum_texField.text = [NSString stringWithFormat:@"%.1f",_ex_buynum_texField.text.floatValue + 0.5];
_goodsModel.goods_number = _ex_buynum_texField.text.floatValue;
if ([self.shopDelegate respondsToSelector:@selector(shopCellEndEditerClick:beforeBuyNum:)]) {
[self.shopDelegate shopCellEndEditerClick:self.tag beforeBuyNum:beforeBuyNum];
}
/// 传递给服务器 一会写 $$$$$$$$
}
- (IBAction)reduceBtnClick {
if (_ex_buynum_texField.editing) {
return;
}
// 保存之前值
float beforeBuyNum = _goodsModel.goods_number;
// 判断不能小于0.5
if (_ex_buynum_texField.text.floatValue == 0.5) {
return;
}
/// 修改模型数据
_ex_buynum_texField.text = [NSString stringWithFormat:@"%.1f",_ex_buynum_texField.text.floatValue - 0.5];
_goodsModel.goods_number = _ex_buynum_texField.text.floatValue;
if ([self.shopDelegate respondsToSelector:@selector(shopCellEndEditerClick:beforeBuyNum:)]) {
[self.shopDelegate shopCellEndEditerClick:self.tag beforeBuyNum:beforeBuyNum];
}
/// 传递给服务器 一会写 $$$$$$$$
}
@end
