我有一個UITableView,它有18個部分,每個部分有1個標題頭和1個單元格。在每個單元格中,都會有一個水平的UIScrollView,其中包含多個圖像。UITableViewCell重用和圖像重新呈現
問題是...我可以正確加載圖像和單元格,但是當圖像數量增加並且單元格滾動到頂部時,會有其他單元格中彈出的圖像...以及所有渲染和圖像都是錯誤的......圖像應該在第3節或第4節出現在第1節......等。
數據源從JSON加載,並且JSON是正確的。當圖像不多並且只有5-8個部分時,一切都很完美。所以,它導致我相信這是產生這個問題的UITableViewCell的重用。
能有人給我一隻手搭在這...感謝..下面是UITableViewCell的
// Customize the appearance of table view cells.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = nil;
// add a placeholder cell while waiting on table data
if ([self.datasource count] == 0 && indexPath.section == 0 && indexPath.row == 0)
{
UILabel *Fetch;
static NSString *infoCell = @"infoCell";
cell = [tableView dequeueReusableCellWithIdentifier:infoCell];
if (cell == nil)
{
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle
reuseIdentifier:infoCell] autorelease];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
CellFetch = [[[UILabel alloc] initWithFrame:CGRectMake(15.0, 120.0, 280.0, 80.0)] autorelease];
CellFetch.tag = FETCH_TAG;
CellFetch.font = [UIFont boldSystemFontOfSize:16.0];
CellFetch.textColor = [UIColor grayColor];
CellFetch.shadowColor = [UIColor whiteColor];
CellFetch.shadowOffset = CGSizeMake(0, -0.5);
CellFetch.textAlignment = UITextAlignmentCenter;
[cell.contentView addSubview:CellFetch];
} else {
CellFetch = (UILabel *)[cell.contentView viewWithTag:FETCH_TAG];
}
Fetch.text = fetchStatus;
return cell;
} else {
UIScrollView *imgScroll;
static NSString *imgCell = @"imgCell";
cell = [tableView dequeueReusableCellWithIdentifier:imgCell];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:imgCell] autorelease];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
imgScroll = [[[UIScrollView alloc] initWithFrame:CGRectMake(0.0, 0.0, 320, 108.0)]autorelease];
imgScroll.tag = SCROLLVIEW_TAG;
imgScroll.showsVerticalScrollIndicator = NO;
imgScroll.showsHorizontalScrollIndicator = NO;
} else {
imgScroll = (UIScrollView *)[cell.contentView viewWithTag:SCROLLVIEW_TAG];
}
NSArray *sorted = [[self.datasource allKeys] sortedArrayUsingSelector:@selector(caseInsensitiveCompare:)];
//NSArray *allDistrict = [self.datasource allValues];
NSString *key = [sorted objectAtIndex:indexPath.section];
NSArray *img = [self.datasource valueForKey:key];
int column = 0;
int space = 10;
int width = 80;
int x = space+5.0;
for (NSUInteger i=0; i < img.count; i++) {
UIButton * button = [UIButton buttonWithType:UIButtonTypeCustom];
NSDictionary *Info = [img objectAtIndex:i];
NSString *iconURL = [NSString stringWithFormat:@"%@",[Info objectForKey:@"ImgURL"]];
button.frame = CGRectMake(x , 4, 80, 80);
[button setImageWithURL:[NSURL URLWithString:iconURL] placeholderImage:[UIImage imageNamed:@"pholder"]];
NSString *imgID = [Info objectForKey:@"ImgID"];
int k = [imgID intValue];
button.tag = k;
[button addTarget:self action:@selector(onButtonPressed:) forControlEvents:UIControlEventTouchUpInside];
[imgScroll addSubview:button];
x+=space+width;
column++;
}
[imgScroll setContentSize:CGSizeMake(column*90+10, 108)];
[cell.contentView addSubview:imgScroll];
}
// Configure the cell...
return cell;
}
感謝...但部分計數動態的,所以我不知道有多少節,直到json加載...所以,這個解決方案將無法工作 –
該節包含在傳遞給委託方法的indexPath「cellForRowAtIndexPath:(NSIndexPath *)indexPath」並可以從indexPath.section – jerrylroberts
獲得它完美的工作,謝謝!= D –