Question

我有一些代码可以更改单元格的背景图像，该图像在分组表格视图中完美运行。但是，不在普通表中。有谁知道为什么这些表现不同？我想要做的就是将一个背景图像添加到表格单元格（普通）

这适用于分组表格视图。我是否需要一个自定义单元格才能使用普通视图？

谢谢Simon

-(void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath {

UniversalAppAppDelegate *appDelegate = (UniversalAppAppDelegate *)[[UIApplication sharedApplication] delegate];

NSArray *rowData;

// Check see if section Data is populated
if (self.sectionData == nil) {
    rowData = [(NSDictionary *)[tableData objectAtIndex:indexPath.section] objectForKey:@"SectionItems"];
} else {
    rowData = [(NSDictionary *)[sectionData objectAtIndex:indexPath.section] objectForKey:@"SectionItems"]; //[self.sectionData objectAtIndex:indexPath.section];
}

NSDictionary *cellDetails = [rowData objectAtIndex:indexPath.row];

// Clear any previous imageview
UIView *view = [cell.backgroundView viewWithTag:99];
if (view != nil)
    [view removeFromSuperview];

// Add a new imageview
NSString *filename = [cellDetails objectForKey:@"TableItemFullImage"];
if (filename.length > 0) {

    UIImageView *cellImageView = [[UIImageView alloc] initWithImage:[appDelegate imageForImageID:[cellDetails objectForKey:@"TableItemFullImage"] imageExtension:[cellDetails objectForKey:@"TableItemFullImageType"]]];
    cellImageView.tag = 99;
    CGRect newFrame = cell.backgroundView.bounds;
    cellImageView.frame = newFrame;

    [cell.backgroundView addSubview:cellImageView];
    [cellImageView release];
}

}

Answer 1

你过度复杂了。

UIImage * image = [appDelegate ...];
cell.backgroundView = [[[UIImageView alloc] initWithImage:image] autorelease];

Answer 2

我怀疑在普通表视图中，indexPath.section不会返回正确的数据。所以这几行代码可以给你一个nil rowData。仔细检查

// Check see if section Data is populated
if (self.sectionData == nil) {
    rowData = [(NSDictionary *)[tableData objectAtIndex:indexPath.section] objectForKey:@"SectionItems"];
} else {
    rowData = [(NSDictionary *)[sectionData objectAtIndex:indexPath.section] objectForKey:@"SectionItems"]; //[self.sectionData objectAtIndex:indexPath.section];
}

iPhone：普通表问题。细胞背景图像没有出现

2 个答案: