I have a grouped UITableView that has 3 sections. I would like to show a UIImage with some text next to it (not a cell), but I am not sure how I can go about doing that? The image and text need to match the background of the pinstripes.
A UITableView has a backgroundView property that it uses to display the pinstripes for the grouped style. You can either replace the background view or add to it. If you replace it, you lose the pinstripes.
[myTable.backgroundImage addSubview:myImage];
[myTable.backgroundImage addSubview:myLabel];
You don't have to define a custom cell, you can use a standard UITableViewCell. It has properties for text and an image. Assign the image to the imageView property, put the text in the textLabel property.
Depending on the size of your image and your desired placement, you can use the imageView property of the UITableViewCell. Essentially, your cellForRowAtIndexPath will look like this:
- (UITableViewCell *) tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
//Normal cell setup
cell.imageView.image = myImage;
cell.textLabel.text = imageDescription;
return cell;
}
That will create a cell with an image at the left edge with text after it in the middle/right edge
[self.tableView addSubview:myImageView];
[Self.tableView sendSubviewToBack:myImageView];
Or
self.tableView.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:"myimage.png"]];
Use Photoshop to place something on top of an image of the pinstripes.
Related
When i used
self.view.backgroundColor = [UIColor colorWithPatternImage:
[UIImage imageNamed:#"image_name.png"]];
the cell carry bottom part of image and it looks like strip on view
Use the following method to set cell height exactly the same as your image's height:
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
Also you might want to remove separators depending on how your image looks using the following code:
MyTableName.separatorStyle = UITableViewCellSeparatorStyleNone;
I'm loading a custom nib file to customize the cells of a UITableView. The custom nib has a UILabel that is referenced from the main view by tag. I would like to know if it is possible to change the shadow color of the UILabel when the cell is selected to a different color so it doesn't look like in the screenshot.
I prefer to make the shadow color change inside the TableCell code to not pollute the delegate. You can override this method to handle it:
- (void)setHighlighted:(BOOL)highlighted animated:(BOOL)animate
{
UIColor * newShadow = highlighted ? [UIColor clearColor] : [UIColor whiteColor];
nameLabel.shadowColor = newShadow;
[super setHighlighted:highlighted animated:animate];
}
You could change the label's shadow color in -tableView:willSelectRowAtIndexPath: in the delegate. For instance:
-(NSIndexPath*)tableView:(UITableView *)tableView willSelectRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell* cell = [tableView cellForRowAtIndexPath:indexPath];
cell.textLabel.shadowColor = [UIColor greenColor];
return indexPath;
}
-(void)tableView:(UITableView *)tableView didDeselectRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell* cell = [tableView cellForRowAtIndexPath:indexPath];
cell.textLabel.shadowColor = [UIColor redColor];
}
I had the same issue and none of the above solutions quite worked for me - I didn't want to subclass UITableViewCell and also had some tricky selected/highlighted state changes done programmatically, which did not play well with the solutions above.
MySolution:
What I did in the end is to use a second UILabel underneath the primary UILabel to act as a shadow. For that 'shadow' UILabel you can set the 'Highlighted Color' to 'Clear Color'.
Obviously you have to update the shadow label each time you update the primary label. Not a big price to pay in many cases.
Hope that helps!
The simple answer, at least for the example shown above, is to not display the shadow in the first place. Since you can't see the white-on-white anyway, set the shadowColor to -clearColor.
If you actually need a shadow though, overriding the -setHighlighted method is the best solution. It keeps the code with the cell, which I think is better than trying to handle it from the table view.
Before describing the problem, let me first point out that this is a distinct issue from this question.
The Problem
This screenshot was taken with a break set at tableView:didSelectRowAtIndexPath:, and as you can see in the simulator (far right of the image), there's a single-pixel blue line at the bottom of the selected cell. This is not the design asked for by the client, nor is it how this app used to behave: there should be no separator, even on selection.
How I Got Here
I'd initially designed this table view using custom UITableViewCell classes with corresponding nib (.xib) files and had no trouble with selections: the separator was hidden as desired. Predictably, scrolling was sluggish due to all the overhead from the view hierarchy, so I reworked the custom cells to use Loren Brichter's fast scrolling solution. Now scrolling is much faster, but I can't get rid of the separator for the life of me.
What I've tried
At the time of the screenshot above...
the table view has "Separator [None]" in IB.
the UIViewController that contains the table view has this line in viewDid Load: self.tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
As you can see in the screenshot, I inserted some unused lines to prove that separatorStyle is set as desired. Other testing confirms that tableView and self.tableView are equivalent pointers at that same breakpoint.
I've also tried setting tableView.separatorColor to black and to clear, all with the same result: the cells look right until a selection is made.
Manjunath: Here's the code I'm using to draw alternate backgrounds depending on whether the cell's been touched or not. You can see the difference—which is less subtle when animated—in the screenshot.
if(self.highlighted) {
textColor = [UIColor blackColor];
UIImage *bg = [UIImage imageNamed:#"image-cell-background_highlighted.png"];
[bg drawAtPoint:CGPointMake(0.0, 1.0)];
}
else {
UIImage *bg = [UIImage imageNamed:#"image-cell-background.png"];
[bg drawAtPoint:CGPointMake(0.0, 0.0)];
}
This gets called in UIImageCell.m in drawContentView:, a method inherited from Mr. Brichter's ABTableViewCell super class.
Chris,
Delving into ABTableViewCell, I see:
- (void)setFrame:(CGRect)f
{
[super setFrame:f];
CGRect b = [self bounds];
b.size.height -= 1; // leave room for the seperator line
[contentView setFrame:b];
}
Since the height of the cell is one pixel shorter than the actual cell, when the cell gets selected, that one-pixel line will bleed through in the color of the selection color. It may look like it's the separator, but it is actually the selection color.
To test, try to change that line above to be two pixels or more shorter to see what happens.
Update:
By making this change to the FastScrollingExample project's -rootViewController:
- (void)viewDidLoad
{
self.title = #"Fast Scrolling Example";
self.tableView.separatorStyle = UITableViewCellSeparatorStyleNone;
[super viewDidLoad];
}
and commenting out:
// if(self.selected)
// {
// backgroundColor = [UIColor clearColor];
// textColor = [UIColor whiteColor];
// }
//
in -drawContentView to mimic what would happen if you didn't have the selection color showing through, then I get a screen shot like this:
alt text http://files.me.com/mahboud/7k656q
Look familiar?
How would you get around this? If you don't need to select cells, then disable cell selection. Otherwise, if you are selecting cells, then you should make the rect larger so the default selection color doesn't show through when you paint with your own selection color in -drawConentRect.
Try this:
[cell setSelectionStyle:UITableViewCellSelectionStyleNone];
// Customize the appearance of table view cells.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = NSLocalizedString(#"Cell",#"");
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (nil == cell)
{
cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:CellIdentifier] autorelease];
}
[cell setSelectionStyle:UITableViewCellSelectionStyleNone];
return cell;
}
How can I set the background color of a cell in UITableView?
Thanks.
I know this is an old post, but I am sure some people are still looking for help. You can use this to set the background color of an individiual cell, which works at first:
-(UITableViewCell*)tableView:(UITableView*)tableView cellForRowAtIndexPath:(NSIndexPath*)indexPath {
[cell setBackgroundColor:[UIColor lightGrayColor]];
However, once you start scrolling, the iphone will reuse cells, which jumbles different background colors (if you are trying to alternate them). You need to invoke the tableView:willDisplayCell:forRowAtIndexPath. This way, the background color gets set before the reuse identfier is loaded. You can do it like this:
- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath {
cell.backgroundColor = ([indexPath row]%2)?[UIColor lightGrayColor]:[UIColor whiteColor];
}
The last line is just a condensed if/else statement. Good luck!
Update
Apparently the existing UITableViewCell framework makes it very difficult to change the background color of a cell and have it work well through all its state changes (editing mode, etc.).
A solution has been posted at this SO question, and it's being billed on several forums as "the only solution approved by Apple engineers." It involves subclassing UITableViewCell and adding a custom view for the subclassed cell's backgroundView property.
Original post - this solution doesn't work fully, but may still be useful in some situations
If you already have the UITableViewCell object, just alter its contentView's backgroundColor property.
If you need to create UITableViewCells with a custom background color, the process is a bit longer. First, you'll want to create a data source for your UITableView - this can be any object that implements the UITableViewDataSource protocol.
In that object, you need to implement the tableView:cellForRowAtIndexPath: method, which returns a UITableViewCell when given an NSIndexPath for the location of the cell within the table. When you create that cell, you'll want to change the backgroundColor property of its contentView.
Don't forget to set the dataSource property of the UITableView to your data source object.
For more info, you can read these API docs:
UITableViewDataSource - tableView:cellForRowAtIndexPath
UITableViewCell - contentView
UIView - backgroundColor
UITableView - dataSource
Note that registration as an Apple developer is required for all three of these links.
The backgroundView is all the way on the bottom. It's the one that shows the rounded corners and the edges. What you want is the contentView which is on top of the backgroundView. It covers the usually white area of the cell.
The version I wrote will work in iPhone 3.0 or higher and fallback to a white background otherwise.
In your viewDidLoad method of the UITableViewController we add the following:
self.view.backgroundColor=[UIColor clearColor];
// Also consider adding this line below:
//self.tableView.separatorColor=[UIColor clearColor];
When you are creating your cells (in my code this is my tableView:cellForRowAtIndexPath:) add the following code:
cell.backgroundColor=[UIColor colorWithPatternImage:[UIImage imageNamed:#"code_bg.png"]];
float version = [[[UIDevice currentDevice] systemVersion] floatValue];
if (version >= 3.0)
{
[[cell textLabel] setBackgroundColor:[UIColor clearColor]];
}
This works perfectly for me:
NSEnumerator *enumerator = [cell.subviews objectEnumerator];
id anObject;
while (anObject = [enumerator nextObject]) {
if( [anObject isKindOfClass: [ UIView class] ] )
((UIView*)anObject).backgroundColor = [UIColor lightGrayColor];
}
You may set the backgroundColor of the backgroundView. If the backgroundView does not exists, you can create one for it.
if (!tableView.backgroundView) {
tableView.backgroundView = [[UIView alloc] initWithFrame:tableView.bounds];
}
tableView.backgroundView.backgroundColor = [UIColor theMostFancyColorInTheUniverse];
If you want to set the background of a cell to an image then use this code:
// Assign our own background image for the cell
UIImage *background = [UIImage imageNamed:#"image.png"];
UIImageView *cellBackgroundView = [[UIImageView alloc] initWithImage:background];
cellBackgroundView.image = background;
cell.backgroundView = cellBackgroundView;
I'm new to Objective-C and iPhone coding and was hoping someone could help me.
Basically I want a scrollable table that displays a name and a quantity of that item. For example:
Apples.........2
Oranges......4
Bananas......5
I want the name to be left-justified and the number to be right-justified.
Is there any way to do this with a UITableView or will I need to extend UIScrollView?
Thanks in advance.
Set cell.text to "Apples". Then create an new UILabel view with the text "2" and assigned it to cell.accessoryView.
Text is always on the left, and accessory views are always on the right. Optionally a UIImage in cell.image will be displayed to the left of the cell text if you choose to add one.
If you have a cell layout more complicated than that you have to add subviews to your cell manually.
One not too difficult option is to subclass UITableViewCell with one label for the text and one label for the number, then just set the label values.
If you want the ... that you've shown then you could probably use a standard UITableViewCell and write some code to feed the cell text that has been pre-modified to fit in the space alloted.
You could simply use another CellType, which is already provided by apple and change the color for the detailTextLabel:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CustomCellIdentifier = #"Cell";
UITableViewCell *cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:CustomCellIdentifier];
cell.textLabel.text = #"Apples";
cell.detailTextLabel.text = #"2";
cell.detailTextLabel.textColor = [UIColor blackColor];
return cell;
}
No need to bother with subclassing or adding labels on your own.