Do you know how to display a popover on UITableViewCell like in the facebook app?
Here's an iphone screenshot
They aren't using UIPopover here. When the cell is tapped you can get the indexPath and use:
- (CGRect)rectForRowAtIndexPath:(NSIndexPath *)indexPath
Then you can create a custom UIView and overlay it on top of the UITableView and then in this case they also use a dark transparent layer to help distinguish it from the other content.
src example:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
...
CGRect myRect = [tableView rectForRowAtIndexPath:indexPath];
UIView * myView = [[MyCustomView alloc] initWithFrame:CGRectMake(0,myRect.origin.y + 5,320,300]
[self.view addSubview:myView];
...
}
Related
I need to allow my users to scroll through a list of thumbnails in the documents directory on an iPad application. When they tap on one of the thumbnails, I need to know which one was tapped (or have it call a method, which is basically the same thing.)
I know how to put the thumbnails in the documents directory, and how to read them from there. But I’m not sure which widget is best for displaying the content. Is it UITableView? CCScrollLayer? CCMenuAdvanced? Something else?
CCScrollLayer doesn't work as well as UIScrollView.
I use the view to CCdirector for add UIkit.
UIScrollView *scrollView = [UIScrollView alloc] init];
[[[CCDirector sharedDirector] view] addSubview:scrollView];
or add UITableView.
Take all the paths for thumbnails in one array, lets call pathsArray
NSArray *pathsArray = [seld getPathsForAllImages];
Now implement UITableViewDataSource and UITableViewDelegate:
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [pathsArray count];
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *cellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
if (cell == nil)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:cellIdentifier];
}
NSString *pathForImage = [pathsArray objectAtIndex:indexPath.row];
cell.imageView.image = [UIImage imageWithContentsOfFile:pathForImage];
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
NSString *pathForImage = [pathsArray objectAtIndex:indexPath.row];
}
I've had all kinds of problems with overlaying a UIScrollView on a cocos2d project. Even with all the suggested hacks, if a single frame takes too long in cocos2d, the UIScrollView just stops working right. I would suspect that would happen with a UITableView as well.
To solve my own problems, I created a custom ScrollNode class. It's really easy to use:
// create the scroll node
ScrollNode *scrollNode = [ScrollNode nodeWithSize:CGSizeMake(size.width, size.height)];
[self addChild:scrollNode];
// Generate some content for the scroll view
// add it directly to scrollView, or to the built in menu (scrollView.menu)
[scrollNode.menu addChild:yourMenuItem];
// Set the content rect to represent the scroll area
CGRect contentRect = [scrollNode calculateScrollViewContentRect];
[scrollNode setScrollViewContentRect:contentRect];
In my application i need to display multiple images in a UITableView,so i've already searched a lot in the web for the proper way to load large images to UITableViewCells,to be more clearly i'll divide the procedure that my app execute:
Download images asynchronous;
Save them to NSHomeDirectory();
=> Thins part is working perfectly.
The problem is,how to display the images in the UITableViewCell,i've already tried to add UIImageView's to the cell contentView but the scrolling performance were a bit affected,i've searched on Apple guides and i believe the correct way is adding UIImageView's to the cell and loading the images from NSHomeDirectory(),so:
What's the best way to customize a UITableViewCell and add the UIImageView's(302x302px) to it?
To get the best scroll performance, you must draw the content of the UITableViewCell yourself.
Loren Brichter, the author of the Tweetie app (now the official Twitter app), wrote a very famous blog post on this. Sadly, this blog post has been deleted.
This article may help you, though. It explains the fast scrolling, it has examples and it has a video to a presentation from Loren Brichter.
Basically, what you want to do is to subclass UITableViewCell and override the drawRect:method. To show an image, you would do something like the following:
- (void)drawRect:(CGRect)rect
{
[myImage drawAtPoint:CGPointMake(10, 10)];
}
This way you avoid to layout a lot of subviews.
I have the same question.
I'm doing the following:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString* CustomCellIdentifier = #"CustomCellIdentifier";
CustomCell* cell = [tableView dequeueReusableCellWithIdentifier:CustomCellIdentifier];
if (cell == nil) {
cell = [[CustomCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CustomCellIdentifier];
}
// add subview to cell
if (cell.customView == NULL) {
cell.customView = [[CustomView alloc] initWithFrame:cell.frame];
[cell.contentView addSubview:cell.customView];
}
// bind cell data
return cell;
}
Firstly, you need to create a custom cells for UITableView & keep going through following points.
set height of each row to 302 pixels as
-(CGFloat) tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
return 302.0;
}
Use following code to create UIImageView at each cell of table
-(UITableViewCell*) tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell=[tableView dequeueReusableCellWithIdentifier:#"cell"];
const NSInteger IMAGE_VIEW_TAG=1001;
UIImageView *imageView;
if(cell==nil)
{
cell=[[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:#"cell"] autorelease];
cell.accessoryType=UITableViewCellAccessoryDisclosureIndicator;
imageView =[[[UIImageView alloc] initWithFrame:CGRectMake(10, 0, 302, 302)] autorelease];
imageView.tag=IMAGE_VIEW_TAG;
imageView.contentMode=UIViewContentModeScaleAspectFit;
[cell.contentView addSubview:imageView];
}
imageView=(UIImageView*)[cell.contentView viewWithTag:IMAGE_VIEW_TAG];
[imageView setImage:[UIImage imageNamed:#"image.png"];
return cell;
}
set number of rows you want to display
-(NSInteger) tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return 5;
}
dont forget to add TableView delegate and data source , UITableViewDelegate and UITableViewDataSource
I have a table view with a list of items. When I click on one of those items I want the background to be highlighted. I have that code working but the colour changes on release, not on the click itself. How can I highlight when the user taps on the cell and not when he/she releases it?
Here is my code:
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
// Navigation logic may go here. Create and push another view controller.
Help_Cell *cell =(Help_Cell*) [tableView cellForRowAtIndexPath:indexPath];
cell.selectionStyle=UITableViewCellSelectionStyleNone;
UIView *v=[[UIView alloc] initWithFrame:cell.frame];
v.backgroundColor=[self colorForHex:[appDel.appColorSettings objectForKey:#"cellColor2"]];
cell.backgroundView=v;
cell.title.textColor=[self colorForHex:[appDel.appColorSettings objectForKey:#"cellColor1"]];
}
I want it to happen like a button. Is there an onClick method for a UITableView or a UITableViewCell besides didSelectRowAtIndexPath?
EDIT
Here is my code from cellForRowAtIndexPath
-(void)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
Help_Cell *cell =(Help_Cell*) [tableView cellForRowAtIndexPath:indexPath];
cell.selectionStyle=UITableViewCellSelectionStyleNone;
UIView *v=[[UIView alloc] initWithFrame:cell.frame];
v.backgroundColor=[self colorForHex:[appDel.appColorSettings objectForKey:#"cellColor2"]];
cell.selectedBackgroundView=v;
}
At the time of creating cell, in cellForRowAtIndexPath, write below code:
UIView *v=[[UIView alloc] initWithFrame:cell.frame];
v.backgroundColor = [self colorForHex:[appDel.appColorSettings objectForKey:#"cellColor2"]];
cell.selectedBackgroundView = v;
No need to write anything in didSelectRow method.
You can consider this as option
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
[tableView selectRowAtIndexPath:indexPath.row animated:YES scrollPosition:UITableViewScrollPositionTop];
}
I have no idea how to do this. I have a tableview on firstview with some labels. And they have a disclosure button I want to obtain the data from the labels and show them in secondview in other labels.
How to do it please?
Thank you
To get the selected cell you have to implement:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
YourCellType *cell = [self tableView:tableView cellForRowAtIndexPath:indexPath];
}
YourCellType is an UITableViewCell subclass having the desired parameters (UILabel, UIImageView, etc.).
So if you have a UILabel *label1 in cell, you can access it by:
cell.label1
Hope this helps
The cell in this iPhone TableView definitely has a Detail-Disclosure-Button.
When I tap it... shouldn't this code give me access to the button?
Instead detailButton is always just null.
- (void) tableView:(UITableView *)tableView accessoryButtonTappedForRowWithIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *aCell = [tableView cellForRowAtIndexPath:indexPath];
UIButton *detailButton = (UIButton *)[aCell accessoryView];
}
are you over-riding the cell accessory button in 'cellForRowAtIndexPath' by any chance?
accessoryView is provided for your own customization, to override accessoryType. The table view cell will internally handle whatever you assign to accessoryType without affecting accessoryView.