我已经实现了异步图像视图,以在自定义单元格视图上加载图像,但图像在单元格上显示得很小。所以我需要在点击图像视图时显示该图像的放大形式。我怎样才能做到这一点?
这是我的代码:
if (cell == nil) {
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
//create new cell
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
//common settings
cell.selectionStyle = UITableViewCellSelectionStyleNone;
cell.accessoryType = UITableViewCellAccessoryDetailDisclosureButton;
cell.layer.cornerRadius = 10;
cell.layer.masksToBounds = YES;
cell.imageView.contentMode = UIViewContentModeScaleAspectFit;
cell.imageView.frame = CGRectMake(10.0f, 10.0f, 60.0f, 44.0f);
cell.imageView.backgroundColor = [UIColor colorWithRed:73 green:73 blue:73 alpha:1];
cell.imageView.image = [UIImage imageNamed:@"Placeholder.png"];
imgBtn=[cell imageView];
objectAtIndex:indexPath.row]objectForKey:@"Name"];
cell.imageView.imageURL = [NSURL URLWithString:[[detailsList objectAtIndex:indexPath.row]objectForKey:@"image_url"]];
}
我想在触摸单元格内的图像视图时放大图像。有什么想法吗?提前谢谢。
您可以使用手势识别器添加图像,如下所示:-
UITapGestureRecognizer *tapped = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(imageTapped:)];
tapped.numberOfTapsRequired = 1;
[image setUserInteractionEnabled:YES];
image.tag = indexPath.row;
[image addGestureRecognizer:tapped];
[cell.contentView addSubview:image];
您的图像点击功能将是:-
- (void)imageTapped:(UITapGestureRecognizer *)gesture
{
UIImageView *img = (UIImageView *)[gesture view];
BigimgView.image = img.image
[self.view addSubview:BigimgView];
UITableViewCell *cell = [MyTableView cellForRowAtIndexPath:[NSIndexPath indexPathWithIndex:img.tag]];
}
BigimgView可以是大尺寸图像视图的iboutlet。
尝试使用UIButton:
UIButton * b = [[UIButton alloc] initWithFrame:CGRectMake(0.0f, 0.0f , cell.imageView.frame.size.width, cell.imageView.frame.size.height)];
b.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
[b addTarget:self action:@selector(changeSize:) forControlEvents:UIControlEventTouchUpInside];
[cell.imageView addSubview:b];
-(IBAction)changeSize:(UIButton *)sender
{
UIImageView * imageView = (UIImageView *)[sender superview];
imageView.frame = //Your larger frame goes here
}
您想在点击imageView时收到消息吗?一个可能的解决方案是创建一个自定义的UITableViewCell,可能在自己的xib文件中。
那么您的问题将是使自定义UITableViewCell上的UIImageView可单击。请看一下这个问题:这里是
一个更简单的解决方案是使用UIButton,而不是UIImageView。您可以将图像/背景图像设置为UIButton。
在自定义单元格中添加按钮。
@interface custom : UITableViewCell
{
UIButton *button1
}
然后在xib中添加按钮。然后连接该按钮。
来看看tableview数据源方法。
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"CellIdentifier";
// Dequeue or create a cell of the appropriate type.
/// UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
custom *cell=(custom *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
// cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
NSArray *topView=[[NSBundle mainBundle]loadNibNamed:@"custom" owner:self options:nil];
for(id currentobject in topView)
{
if ([currentobject isKindOfClass:[UITableViewCell class]])
{
cell=(custom *)currentobject;
//cell.backgroundView.backgroundColor=[UIColor clearColor];
break;
}
}
}
// 0.0f, 0.0f , cell.imageView.frame.size.width, cell.imageView.frame.size.height
[cell.button1 addTarget:self action:@selector(changeSize) forControlEvents:UIControlEventTouchUpInside];
}
现在单击按钮。它将转到该方法。,。,试试看
-(IBAction)changeSize:(UIButton *)sender
{
UIImageView * imageView = (UIImageView *)[sender superview];
imageView.frame = //Your larger frame goes here
}
你需要给出单元格的背景图像。按钮1它可能会帮助你。
我在学习。,