**如何选择的CollectionView单细胞和取消选择所有其它细胞
我已经水平的CollectionView其中选择的单元有橙色 渐变颜色和所有其他取消细胞灰色IM 仅使用didselect委托方法但我正在逐渐 多个单元格的选择问题,我有表 视图与同一个概念的问题,同时滚动和我寻觅了很多,但我还没有得到重用细胞的 正确答案
**
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
DateTimeCell * cell = [self.collectionView dequeueReusableCellWithReuseIdentifier:@"DateTimeCellID" forIndexPath:indexPath];
if (self.selectedIndexPath != nil && indexPath == self.selectedIndexPath)
{
CAGradientLayer *gradient = [CAGradientLayer layer];
gradient.frame = cell.mainView.bounds;
gradient.startPoint = CGPointZero;
gradient.endPoint = CGPointMake(1, 1);
gradient.colors = [NSArray arrayWithObjects:(id)[[UIColor colorWithRed:238.0/255.0 green:42.0/255.0 blue:123/255.0 alpha:1.0] CGColor],(id)[[UIColor colorWithRed:241.0/255.0 green:90.0/255.0 blue:41.0/255.0 alpha:1.0] CGColor], nil];
[gradient setMasksToBounds:NO];
cell.mainView.backgroundColor = [UIColor clearColor];
[cell.mainView.layer insertSublayer:gradient atIndex:0];
[indexPaths addObject:self.selectedIndexPath];
}
else
{
[cell.mainView setBackgroundColor:[self colorWithHexString:@"383F4A"]];
}
return cell;
}
-(void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
{
indexPaths = [NSMutableArray arrayWithObjects:indexPath, nil];
if (self.selectedIndexPath)
{
// if we had a previously selected cell
if ([indexPath compare:self.selectedIndexPath] == NSOrderedSame)
{
// if it's the same as the one we just tapped on, then we're unselecting it
NSLog(@"Selected");
}
else
{
// if it's different, then add that old one to our list of cells to reload, and
// save the currently selected indexPath
[indexPaths addObject:self.selectedIndexPath];
self.selectedIndexPath = indexPath;
}
}
else
{
// else, we didn't have previously selected cell, so we only need to save this indexPath for future reference
self.selectedIndexPath = indexPath;
}
dispatch_async(dispatch_get_main_queue(), ^{
[collectionView reloadItemsAtIndexPaths:indexPaths];
});
}
您需要重新加载所有行此。 –
多个单元格现在正在单击选中。 –
在重新加载后管理您所需的选定单元格。 –