我在表格视图单元格中有两个UIButtons和一些标签。我有2个部分，第一部分包含一个表视图单元格，在该单元格内部有两个UIButtons调用api来获取第2部分中单元格的新数据。在某种情况下，创建一个标签，因为字符串很长所以我必须为单元格创建一个新的框架。
我目前遇到的问题是按钮文本也会使用新信息进行更新，有时字符串很短或有时字符串很长，所以我必须删除按钮并添加一个新按钮框架以适应新的字符串。但是，如果过去的按钮字符串比新按钮字符串短，则该按钮仍会显示在后台。我尝试从superview中删除它，并检查它已从superview中删除（检查它是否为null，一旦我删除它）它是，但它仍然出现在屏幕上。同样的事情也发生在UILabels上。我还尝试使用标记（viewWithTag：123）从超级视图中删除它们。任何人都有任何指针，想法，建议，真的，可以帮我解决/解决这个问题吗？
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if(cell == nil)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:CellIdentifier];
UIView *selectedBackgroundView = [[UIView alloc] initWithFrame:CGRectZero];
selectedBackgroundView.backgroundColor = [UIColor colorWithWhite:0.0 alpha:0.1];
cell.selectedBackgroundView = selectedBackgroundView;
if(cell==nil) { NSLog(@"Cell is still nil");}
}
cell.textLabel.text = nil;
cell.accessoryView = nil;
cell.detailTextLabel.text = nil;
cell.userInteractionEnabled = YES;
if(indexPath.section == 0)
{
dosageButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
amountButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[dosageButton setContentHorizontalAlignment:UIControlContentHorizontalAlignmentLeft];
[dosageButton setContentEdgeInsets:UIEdgeInsetsMake(0, 15, 0, 0)];
[amountButton setContentHorizontalAlignment:UIControlContentHorizontalAlignmentLeft];
[amountButton setContentEdgeInsets:UIEdgeInsetsMake(0, 15.5, 0, 0)];
if(strengths.count == 0) { [dosageButton setTitle:@"Dosage" forState:UIControlStateNormal];}
else
{
[dosageButton setTitle:selectedStrength forState:UIControlStateNormal];
CGSize stringsize = [selectedStrength sizeWithFont:[UIFont systemFontOfSize:14]];
[dosageButton setFrame:CGRectMake(5, 27.5, stringsize.width + 30, 30)];
}
if(quantity.count == 0) { [amountButton setTitle:@"Amount" forState:UIControlStateNormal];}
else
{
int value = [selectedQuantity intValue];
if (value == 1)
{
NSString *amountAndFormat = [NSString stringWithFormat:@"%@ %@", selectedQuantity, selectedFormat];
[amountButton setTitle:amountAndFormat forState:UIControlStateNormal];
CGSize stringsize = [selectedStrength sizeWithFont:[UIFont systemFontOfSize:14]];
CGSize amountSize = [amountAndFormat sizeWithFont:[UIFont systemFontOfSize:14]];
if(amountSize.width+stringsize.width > 250)
{
dosageButton.frame = CGRectMake(5, 27.5, 130, 30);
amountButton.frame = CGRectMake(140, 27.5, 160, 30);
}
else
{
[amountButton setFrame:CGRectMake(stringsize.width + 40, 27.5, amountSize.width + (amountSize.height * 2.1), 30)];
}
}
else
{
NSString *amountAndFormat = [NSString stringWithFormat:@"%@ %@", selectedQuantity, selectedFormatPlural];
[amountButton setTitle:amountAndFormat forState:UIControlStateNormal];
CGSize stringsize = [selectedStrength sizeWithFont:[UIFont systemFontOfSize:14]];
CGSize amountSize = [amountAndFormat sizeWithFont:[UIFont systemFontOfSize:14]];
if(amountSize.width + stringsize.width> 250)
{
dosageButton.frame = CGRectMake(5, 27.5, 130, 30);
amountButton.frame = CGRectMake(140, 27.5, 160, 30);
}
else
{
[amountButton setFrame:CGRectMake(stringsize.width + 40, 27.5, amountSize.width + (amountSize.height * 2.1), 30)];
}
}
}
[dosageButton addTarget:self action:@selector(showDosages:) forControlEvents:UIControlEventTouchUpInside];
[amountButton addTarget:self action:@selector(showAmount:) forControlEvents:UIControlEventTouchUpInside];
//[cell.contentView addSubview:dosageButton];
//[cell.contentView addSubview:amountButton];
//adding it to view instead of cell because of userInteraction.
//if I add it to cell.contentView and userInteractionEnabled = NO
//then the user can't press the button
//but if the it is enabled then they can click the cell and looks tacky!
[self.view addSubview:dosageButton];
[self.view addSubview:amountButton];
cell.userInteractionEnabled = NO;
}
if(indexPath.section == 1)
{
if(localName.count == 0)
{
//Nothing
}
else
{
CGRect longStringFrame = CGRectMake(12, 4, 250, 120);
//UILabel *longStringLabel = [[UILabel alloc] initWithFrame:longStringFrame];
UILabel *longStringLabel = [[UILabel alloc] initWithFrame:longStringFrame];
longStringLabel.backgroundColor = [UIColor clearColor];
longStringLabel.font = [UIFont systemFontOfSize:12];
longStringLabel.text = [NSString stringWithFormat:@"Something super duper long. Some really really long string that has a lot of information and cannot fit in one line so I have to use numberOfLines = 0 and NSLineBreakByWordWrapping. This string is really really really long.]];
longStringLabel.textColor = [UIColor blackColor];
longStringLabel.numberOfLines = 0;
longStringLabel.lineBreakMode = NSLineBreakByWordWrapping;
cell.textLabel.text = @"";
longStringLabel.tag = 123;
[cell.contentView addSubview:longStringLabel];
}
}
}
- (void) showDosages:(UIButton *)sender
{
[dosageButton removeFromSuperview];
[amountButton removeFromSuperview];
[[cell.contentView viewWithTag:123] removeFromSuperview];
NSLog(@"%@",[dosageButton superview]);
NSLog(@"%@",[amountButton superview]);
//Also tried it this way as well. Didn't work
//[dosageButton performSelectorOnMainThread:@selector(removeFromSuperview) withObject:nil waitUntilDone:NO];
//[amountButton performSelectorOnMainThread:@selector(removeFromSuperview) withObject:nil waitUntilDone:NO];
dispatch_async(someDispatch, ^{ NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString: [NSString stringWithFormat: @"http://somewebsite.com"]]]; [self performSelectorOnMainThread:@selector(fetchData:) withObject:data waitUntilDone:YES]; });
}
showAmount类似于showDosages
答案 0 :(得分：1)
我建议你创建一个自定义单元格，放置所有标签和放大器。你想要的按钮，给出一个iboutles，以便你可以轻松地管理事物。
自定义单元教程 http://mobile.tutsplus.com/tutorials/iphone/customizing-uitableview-cell/
制作牢房后，您可以根据字符串设置单元格的高度。当您的单元格大小增加或减少时，您的按钮会自动调整
答案 1 :(得分：0)
以下是多个单元标识符的简单示例，希望它可能有所帮助
- (UITableViewCell *) tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
static NSString *CellIdentifier1 = @"Cell1";
static NSString *CellIdentifier2 = @"Cell2";
if(flag == 0) {
MainArticleTableViewCell *cell = (MainArticleTableViewCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier1];
if (cell == nil) {
cell = [[[MainArticleTableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:CellIdentifier1] autorelease];
}
cell.textLabel.text= @"Cell1";
return cell;
}
else {
NewsTableViewCell *cell = (NewsTableViewCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier2];
if (cell == nil) {
cell = [[[NewsTableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:CellIdentifier2 orientation:currentOrientation] autorelease];
}
cell.textLabel.text= @"Cell1";
return cell;
}
return nil;
}