我有一个 UITableView 包含图像列表,每行包含 4 UITableViewCell
,用户可以选择多个图像(选择是通过在单元格上隐藏和显示覆盖图像)我想要做的是当用户单击删除按钮时删除选定的图片来自我的桌子。
这是一些代码:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
static NSString *CellIdentifier = @"Cell";
ThumbnailImageCell *cell = (ThumbnailImageCell *)[tableView dequeueReusableCellWithIdentifier:@"Cell"];
if (cell == nil)
{
cell = [[[ThumbnailImageCell alloc] initWithManagedImages:[self imagesForIndexPath:indexPath] reuseIdentifier:CellIdentifier] autorelease];
}
else
{
[cell setImages:[self imagesForIndexPath:indexPath]];
}
return cell;}
-(NSArray*)imagesForIndexPath:(NSIndexPath*)_indexPath {
int index = (_indexPath.row*4);
int maxIndex = (_indexPath.row*4+3);
if(maxIndex < [self.imagesArray count]) {
return [NSArray arrayWithObjects:[self.imagesArray objectAtIndex:index],
[self.imagesArray objectAtIndex:index+1],
[self.imagesArray objectAtIndex:index+2],
[self.imagesArray objectAtIndex:index+3],
nil];
}
else if(maxIndex-1 < [self.imagesArray count]) {
return [NSArray arrayWithObjects:[self.imagesArray objectAtIndex:index],
[self.imagesArray objectAtIndex:index+1],
[self.imagesArray objectAtIndex:index+2],
nil];
}
else if(maxIndex-2 < [self.imagesArray count]) {
return [NSArray arrayWithObjects:[self.imagesArray objectAtIndex:index],
[self.imagesArray objectAtIndex:index+1],
nil];
}
else if(maxIndex-3 < [self.imagesArray count]) {
return [NSArray arrayWithObject:[self.imagesArray objectAtIndex:index]];
}
return nil;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return ceil([self.imagesArray count] / 4.0);
}
我试图做的是以下但到目前为止没有任何成功
-(void)finishDeleting{
int countOfDeletedThread;
[self setEditing:YES animated:YES];
[self.tableView beginUpdates];
NSMutableIndexSet *mutableIndexSet = [[NSMutableIndexSet alloc] init];
NSMutableArray *indexToDelete = [[NSMutableArray alloc] init];
NSIndexPath *indexPath ;
for(ThumbnailImage *thumbnailImage in self.imagesArray)
{
if([thumbnailImage selected])
{
countOfDeletedThread = countOfDeletedThread+1;
indexPath = [NSIndexPath indexPathForRow:countOfDeletedThread inSection:0];
[indexToDelete addObject:indexPath];
[mutableIndexSet addIndex:indexPath.row];
}
}
[self.imagesArray removeObjectsAtIndexes:mutableIndexSet];
[self.tableView deleteRowsAtIndexPaths:indexToDelete withRowAnimation:UITableViewRowAnimationFade];
[indexToDelete release];
[mutableIndexSet release];
[self.tableView endUpdates];
[self.tableView setEditing:NO animated:YES];
[self.tableView reloadData];
[CATransaction flush];}
请问有什么帮助吗?我被困了2天,不知道该怎么办。
谢谢你。