我有一个 UITableViewController 的问题，只要你向下滚动单元格的背景图像就会增加大小。所有图像都设置为 320px 的宽度，但在您滚动单元格背景图像后仍会展开。
谁能解释为什么会发生这种情况以及如何解决？
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
if (jsonResults.count == 0)
{
return 1;
}
else
{
return [jsonResults count];
}
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"Cell";
UIImage *selectionBackground;
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (jsonResults.count == 0)
{
cell.backgroundView = [[UIImageView alloc] initWithImage:[ [UIImage imageNamed:@"topAndBottomRow.png"]
stretchableImageWithLeftCapWidth:0.0 topCapHeight:5.0]];
selectionBackground = [UIImage imageNamed:@"topAndBottomRowSelected.png"];
[cell.selectedBackgroundView setBackgroundColor:[UIColor colorWithPatternImage:selectionBackground]];
cell.textLabel.text = @"Nothing was found :(";
cell.detailTextLabel.text = @"Click here to add a venue!";
//cell.textLabel.textColor= [UIColor colorWithRed:(79/255.0) green:(129/255.0) blue:(189/255.0) alpha:1] ;
cell.textLabel.font = [UIFont fontWithName:@"Berlin Sans FB" size:22];
cell.detailTextLabel.font = [UIFont fontWithName:@"Berlin Sans FB" size:14];
cell.backgroundColor = [UIColor clearColor];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
}
else
{
cell.selectionStyle = UITableViewCellSelectionStyleDefault;
cell.userInteractionEnabled = YES;
NSDictionary *venuesdict = [jsonResults objectAtIndex:indexPath.row];
NSString *addresslineone = [venuesdict objectForKey:@"address1"];
NSString *postcode = [venuesdict objectForKey:@"postcode"];
NSInteger sectionRows = [tableView numberOfRowsInSection:[indexPath section]];
NSInteger row = [indexPath row];
if (row == 0 && row == sectionRows - 1)
{
//rowBackground = [UIImage imageNamed:@"topAndBottomRow.png"];
cell.backgroundView = [[UIImageView alloc] initWithImage:[ [UIImage imageNamed:@"topAndBottomRow.png"]
stretchableImageWithLeftCapWidth:0.0 topCapHeight:5.0]];
selectionBackground = [UIImage imageNamed:@"topAndBottomRowSelected.png"];
}
else if (row == 0)
{
//rowBackground = [UIImage imageNamed:@"topRow.png"];
cell.backgroundView = [[UIImageView alloc] initWithImage:[ [UIImage imageNamed:@"topRow.png"]
stretchableImageWithLeftCapWidth:0.0 topCapHeight:5.0] ];
selectionBackground = [UIImage imageNamed:@"topRowSelected.png"];
}
else if (row == sectionRows - 1)
{
//rowBackground = [UIImage imageNamed:@"bottomRow.png"];
cell.backgroundView = [[UIImageView alloc] initWithImage:[ [UIImage imageNamed:@"bottomRow.png"]
stretchableImageWithLeftCapWidth:0.0 topCapHeight:5.0] ];
//rowBackground = [UIImage imageNamed:@"bottomRow.png"];
selectionBackground = [UIImage imageNamed:@"bottomRowSelected.png"];
}
else
{
cell.backgroundView = [[UIImageView alloc] initWithImage:[ [UIImage imageNamed:@"middleRow.png"]
stretchableImageWithLeftCapWidth:0.0 topCapHeight:5.0] ];
//rowBackground = [UIImage imageNamed:@"middleRow.png"];
selectionBackground = [UIImage imageNamed:@"middleRowSelected.png"];
}
UIImageView *imgView = [[UIImageView alloc] initWithFrame:cell.selectedBackgroundView.frame];
[imgView setImage:selectionBackground];
[cell.selectedBackgroundView addSubview:imgView];
[cell.selectedBackgroundView setBackgroundColor:[UIColor colorWithPatternImage:selectionBackground]];
cell.textLabel.text = [venuesdict objectForKey:@"name"];
NSString *imagename = [venuesdict objectForKey:@"imagename"];
cell.imageView.image = [UIImage imageNamed:imagename];
cell.detailTextLabel.text = [NSString stringWithFormat:@" %@, %@",addresslineone,postcode];
cell.textLabel.font = [UIFont fontWithName:@"Berlin Sans FB" size:22];
cell.detailTextLabel.font = [UIFont fontWithName:@"Berlin Sans FB" size:10];
cell.backgroundColor = [UIColor clearColor];
NSString *version = [[UIDevice currentDevice] systemVersion];
BOOL isAtLeast7 = [version floatValue] >= 7.0;
if (!isAtLeast7 == YES)
{
cell.detailTextLabel.backgroundColor = [UIColor grayColor];
cell.textLabel.backgroundColor = [UIColor grayColor];
}
}
return cell;
}