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先来看一下用到的数据
- (void)initData{
_goodsArr = @[@"YSL", @"CHANEL", @"TF"];
_colorsArr = @[@"12号色", @"52号色", @"400号色"];
_payWaysArr = @[@"上个月工资", @"这个月工资", @"下个月"];
_titleArr = @[@"送女朋友的品牌",@"色号",@"支付方式"];
_allInfoArr = @[_goodsArr, _colorsArr, _payWaysArr];
}
把每一个section中的数据 添加到了一个数组allInfoArr中 下面会用到哦
enm... 祝愿所有的你们都有机会送.
首先 初始化collectionview时候 把allowsMultipleSelection属性改为yes
_collectionView.allowsMultipleSelection = YES;
在cellForItemAtIndexPath方法中 默认选中一个cell 这里默认选中了第0个
- (UICollectionViewCell *) collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
MyCollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:INDENTIFIE forIndexPath:indexPath];
[collectionView selectItemAtIndexPath:[NSIndexPath indexPathForRow:0 inSection:indexPath.section] animated:YES scrollPosition:UICollectionViewScrollPositionNone];
cell.nameStr = _allInfoArr[indexPath.section][indexPath.item];
return cell;
}
选中后触发的方法didSelectItemAtIndexPath中
- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
{
//根据数据 把所有的都遍历一次 如果是当前点的cell 选中她 如果不是 就不选中她喽
for (NSInteger i = 0; i < [[_allInfoArr objectAtIndex:indexPath.section] count];i++) {
if (i == indexPath.item) {
[self.collectionView selectItemAtIndexPath:[NSIndexPath indexPathForItem:i inSection:indexPath.section] animated:YES scrollPosition:UICollectionViewScrollPositionNone];
}else {
[self.collectionView deselectItemAtIndexPath:[NSIndexPath indexPathForItem:i inSection:indexPath.section] animated:YES];
}
}
}
不选中cell的情况时候 didDeselectItemAtIndexPath中
- (void)collectionView:(UICollectionView *)collectionView didDeselectItemAtIndexPath:(NSIndexPath *)indexPath
{
//如果点击了当前已经选中的cell 忽略她~
[collectionView selectItemAtIndexPath:[NSIndexPath indexPathForItem:indexPath.item inSection:indexPath.section] animated:YES scrollPosition:UICollectionViewScrollPositionNone];
}
