I have the following code that creates a UIView that I assign to my UITableViewCell's selectedBackgroundView property. Everything works as expected, with the exception of the subview's background, which is transparent.
I use the same code to create a custom view that I assign to backgroundView, and that works fine.
What is causing that subview to be transparent for selectedBackgroundView, and how can I avoid that?
- (UIView*) makeSelectedBackgroundView
{
// dimensions only for relative layout
CGRect containerFrame = CGRectMake(0, 0, 320, 40);
UIView* containerView = [[UIView alloc] initWithFrame:containerFrame];
containerView.autoresizesSubviews = YES;
// dimensions only for relative layout
CGRect subframe = CGRectMake(5, 5, 310, 30);
UIView* subview = [[UIView alloc] initWithFrame:subframe];
subview.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
subview.backgroundColor = [UIColor redColor];
subview.layer.cornerRadius = 5;
subview.layer.borderWidth = 2;
subview.layer.borderColor = [UIColor greenColor].CGColor;
[containerView addSubview:subview];
return containerView;
}
As we can see from name of ivar selectedBackgroundView, this background shown by cell when it was selected.
I've to reload few methods (– setSelected:animated: and – setHighlighted:animated:) of UITableViewCell subclass to reset background color of subviews back to their values. Look's like UIKit do some magic in this template methods (iterating over all UIView subclasses and set their background to clearColor)
This code might be helpful for you:
UIImageView *cellImageView = [[UIImageView alloc]
initWithFrame:CGRectMake(0,
0,
cell.frame.size.width,
cell.frame.size.height
)];
cellImageView.contentMode = UIViewContentModeScaleAspectFit;
// normal background view
[cellImageView setImage:[UIImage imageNamed:#"*<ImageName>*"]];
[cell addSubview:cellImageView];
[cell sendSubviewToBack:cellImageView];
[cellImageView release], cellImageView = nil;
Here cell is an object of custom UITableViewCell.
Also you can set backgroundColor property.
I would try to set the alpha for both containerView and subView to 1.0
[containerView setAlpha:1.0];
...
[subview setAlpha:1.0];
this should make your controls totally opaque.
You could also create some images for the background and use that images in state of creating 2 views. Let's say you create 2 image (normalBackground.png and selectedBackground.png) and then set this images as cell background. Here is a nice tutorial.
Try setOpaque:YES on your views.
In the end, I ended up subclassing UITableViewCell which contained a custom view object, and that worked.
Related
I'm trying to add UISearchBar (fixed position!) on top of the UITableView.
CGRect rect = self.headerView.frame;
CGRect newRect = CGRectMake(0,
rect.origin.y + rect.size.height,
rect.size.width,
CZP_SEARCHBAR_HEIGHT);
UIView *view = [[UIView alloc] initWithFrame:newRect];
view.backgroundColor = [UIColor whiteColor];
Result (i got a white rect on position where i want my bar):
But if i want to add subview to my view, searchbar appear on 1st cell of tableview (below my view!)
[view addSubview:searchBar];
Here's one way to do it. It looks like you're trying to do it in code instead of a storyboard, so this is a code example. It also looks like you're doing it in a popover of sorts, I put together a quick project as an example that uses a popover, it doesn't look exactly like yours, but it's close enough to get you where you're trying to go I think.
First, here's the code sample, this is from the view controller that contains the header, search bar and tableview.
- (void)viewDidLoad
{
[super viewDidLoad];
// get the desired size for this popover and setup our header height
CGSize viewSize = self.preferredContentSize; // could also be self.view.bounds.size depending on where you're using it
CGFloat headerHeight = 44.0;
// setup our desired frames
CGRect headerFrame = CGRectMake(0, 0, viewSize.width, headerHeight);
CGRect searchContainerFrame = CGRectMake(0, headerHeight, viewSize.width, headerHeight);
// for this frame I'm simply centering it, there's better ways to do it but this is an example
CGRect searchBarFrame = CGRectMake(5, 5, searchContainerFrame.size.width - 10, searchContainerFrame.size.height - 10);
// set our tableview frame to be positioned below our header and search container frame
CGRect tableviewFrame = CGRectMake(0, headerHeight *2, viewSize.width, viewSize.height - (headerHeight * 2));
// create our header view and set it's background color
UIView *headerView = [[UIView alloc] initWithFrame:headerFrame];
headerView.backgroundColor = [UIColor orangeColor];
// create our container view to hold the search bar (not needed really, but if you want it contained in a view here's how)
UIView *searchContainer = [[UIView alloc] initWithFrame:searchContainerFrame];
searchContainer.backgroundColor = [UIColor greenColor];
// instantiate our search bar
UISearchBar *searchBar = [[UISearchBar alloc] initWithFrame:searchBarFrame];
// add the search bar to the container view
[searchContainer addSubview:searchBar];
// create our tableview and position it below our header and search containers
UITableView *tableview = [[UITableView alloc] initWithFrame:tableviewFrame];
tableview.backgroundColor = [UIColor blueColor];
[self.view addSubview:headerView];
[self.view addSubview:searchContainer];
[self.view addSubview:tableview];
}
That snippet gives me a popover with an orange header, a green/grey search bar and a tableview beneath it.
EDIT: If you're interested in looking through the project file that I used to put this together you can download it off github here
I'm trying on xcode to add a transparent dark mask on an UIImageView but without success, what i tried is to create a UIView set his width and height same to the UIImageView I created on the storyboard and then add a background color with opacity to the view
This is the code I used:
UIView *darken;
CGRect newFrame = darken.frame;
newFrame.size.width = _image1.frame.size.width;
newFrame.size.height = _image1.frame.size.height;
[darken setFrame:newFrame];
darken.backgroundColor = [UIColor colorWithRed:0 green:0 blue:0 alpha:0.85];
[_image1 addSubview:darken];
Can someone help me understand why it doesn't work?
You are not setting the views frame correctly. The x and y values are never set. Also the view never gets initialized and you should add the view to self.view not to the imageView itself.
Try this instead:
UIView *darken = [[UIView alloc]init];
darken.frame = _image1.frame;
//...
[self.view insertSubview:darken aboveSubview:_image1];
hello I built this tableview using the InterfaceBuilder and storyboard I used custom for the style of the cell and content prototype of the table view, this is the image:
custom tableview
but now I need to redo everything programmatically I tried insert an imageview in the cell using this code
UIImageView *imgView = [[UIImageView alloc] initWithFrame:
CGRectMake(300, 0, 80, 80)];
imgView.image = [UIImage imageNamed:#"esquina_estrella.png"];
cell.imageView.image = imgView.image;`
but the image stays static unresponsive to CGRectMake thanks for you help
Use this code to the Cell:
// Make your frame origin 0,0 as below done.
UIImageView *imgView = [[UIImageView alloc] initWithFrame:
CGRectMake(0, 0, 80, 80)];
imgView.image = [UIImage imageNamed:#"esquina_estrella.png"];
[cell addSubview:imgView];
[imgView release];
imgView = nil;
Add
imgView.clipsToBounds = YES;
To limit display of the image to the frame of the image view.
Also, you are adding the image of the image view to the cell's image view, which is a different object, without using your image view and its frame. You actually do not need an image view if you are just using the image. What you want is
cell.imageView = imgView;
or
[cell.contentView addSubview:imgView];
The latter will be preferable if you want to place it exactly and add more image views as in your screen shot.
So I created a custom UINavigationItem category to be able to make a custom titleview for my navbar, but everytime I push/pop a view, it simply adds the new title without getting rid of the old one causing the title to just be a jumble of letters. Here's the relevant code:
#implementation UINavigationItem (CustomNavigationItem)
-(UIView *)titleView
{
[self setTitleView:nil];
UILabel *newTitleView = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 220, 32)];
newTitleView.center = CGPointMake(160, 22);
newTitleView.backgroundColor = [UIColor clearColor];
newTitleView.textColor = [UIColor whiteColor];
newTitleView.textAlignment = UITextAlignmentCenter;
newTitleView.text = self.title;
newTitleView.textAlignment = UITextAlignmentCenter;
return newTitleView;
}
#end
You have to remove the old uilabel from its superview, by setting to nil it doesn't do that. That's why you are messing the letters on screen. I also do not think you are getting a recursion, because you are caling the setter, but I maybe wrong.
A quick thing you could is to assign a tag to your newest created view.
[[self.view viewWithTag:YourCustomEnumTag] removeFromSuperView];
// create your view....
textView.tag=YourEnumCustomTag;
I can't figure out why that view takes the entire screen.
In AppDelegate file
...
self.viewController = [[[ViewController alloc]init]autorelease];
[self.window setRootViewController:self.viewController];
self.window.backgroundColor = [UIColor whiteColor];
..
In ViewController.m
UIView *view = [[UIView alloc]initWithFrame:CGRectMake(30, 30, 30, 30)];
[view setBackgroundColor:[UIColor greenColor]];
self.view = view;
When I run the app the screen is entirely green instead of having just a square in green.
What is wrong here ?
The erroneous line is here:
self.view = view;
When you set a view of a UIViewController that is the root controller, it is guaranteed to fill the screen. Instead, add it as a subview:
[self.view addSubview:view];
And you should be fine.
The view controller automatically manages the size of its root view (self.view), so even if you initialize it with a smaller size it will later get resized to fill the screen. This resizing conveniently also happens when the interface orientation changes (see the answer this question).
As suggested by Richard's answer, you can add your green view as a subview to the controller's root view. The crash you get is probably because the root view does not exist yet when you try to access it. Try the following:
- (void) loadView
{
[super loadView]; // creates the root view
UIView* subView = [[UIView alloc] initWithFrame:CGRectMake(30, 30, 30, 30)];
[subView setBackgroundColor:[UIColor greenColor]];
// because you don't set any autoresizingMask, subView will stay the same size
[self.view addSubview:subView];
}