I have one UIImageView with a UIButton partially overlapping it. I want the user to see the image and the button as one joined object. When I try to give them drop shadow using QuartzCore:
image.layer.shadowOffset = CGSizeMake(5,5);
button.layer.shadowOffset = CGSizeMake(5,5);
The Button's shadow will partly drop on the image. I want the button shadow to only drop for the part that are outside the image. Something like the union of two rectangles. Help will be appreciated!
Thanks
Leo
Put the UIImageView and the UIButton into a parent view. Set the shadow on the parent view. Make sure the parent view is not opaque and has a transparent background color:
- (void)viewDidLoad {
[super viewDidLoad];
self.shadowView.backgroundColor = [UIColor clearColor];
self.shadowView.opaque = NO;
self.shadowView.layer.shadowOffset = CGSizeMake(5, 5);
self.shadowView.layer.shadowColor = [UIColor blackColor].CGColor;
self.shadowView.layer.shadowOpacity = 1.0;
}
Related
I am trying to use the background view of the image view of a UIButton but for some reason it will not show up. This is what I have tried:
detailCell.greenPriorityButton.imageView.frame = detailCell.greenPriorityButton.frame;
[detailCell.greenPriorityButton.imageView setBackgroundColor:[UIColor greenColor]];
[detailCell.greenPriorityButton.imageView setHidden:NO];
[detailCell.greenPriorityButton.imageView setOpaque:YES];
I have called NSLog on the imageView property and it seems everything is as it should be. I can also tap on the button and the method associated with it will be called so I know it exists. Just in case I am missing something here is the NSLog return:
<UIImageView: 0x1d97e1b0; frame = (254 61; 20 20); clipsToBounds = YES; userInteractionEnabled = NO; layer = <CALayer: 0x1d97e210>>
The reason I am not using dot notation to set the image view properties above is because they don't seem to change the values. For example, if I say detailCell.greenPriorityButton.imageView.hidden = NO; it doesn't seem to do anything.
Thanks for any help!
Edit
The reason for not just setting the background color of the button and not its image view is because I am trying to create a small shape in the button. However I want the tappable space to have margins around the shape so it is still user friendly. I thought the image view property would lend useful as I could manipulate the frame and layer of that separately from the frame and layer of the button.
I have now tried adding a UIView *greenBackground as a subview to the button, however this doesn't appear either.
If you want a view that you can have within the view of the button for the purpose of setting its color then I would think that trying to use the imageview is the wrong approach. You could just add a subview that has the changed background color. something like this:
UIView *colorView = [[UIView alloc] initWithFrame:CGRectMake(10, 10, 10, 10)];//Whatever rect you want that will be in reference to the frame of the button
colorView.backgroundColor = [UIColor greenColor];
[detailCell.greenPriorityButton addSubview:colorView];
I would like to know the best way/correct way to achieve from following layout? I want to place an UIImageView outside of UITableViewCell in a UITableView with static cells.
I have done the following by subclassing UITableViewCell for the cells in section 1 using the following code
- (void)setFrame:(CGRect)frame {
frame.size.width -= 125.0;
[super setFrame:frame];
}
In the UITableViewController's viewDidLoad I add the UIImageView and position it according to the width of the custom UITableViewCell.
This sort of works, but i'm not sure how to deal with rotation and also if what i've done so far would be the correct way?
there are differnt ways to do it. one is to set the width of table view less as you showd in pic 2nd is to use custom table view cell and on required cell add image so that your cell data as well as image will be shown. i think custom cell would be the better solution. tell me if you are asking the same thing what i answered, if no, then i review my answer thank.
I managed to produce what I wanted using the follow, this is proberly not the best way or cleanest way but as no one from StackOverFlow gave any better suggestions I thought I better answer this.
I subclassed the first 3 UITableViewCells and set a frame size to take into account the size of my image.
- (void)setFrame:(CGRect)frame {
float cellWidth = (frame.size.width - 345);
frame.size.width = cellWidth;
[super setFrame:frame];
}
Then in my UITableViewController's viewDidLoad I create and position the UIImageView using the first static cell in the tableview as an IBOutlet ("firstCell"). I then set the autoResizingMask which sorts out rotation and finally add the UIImageView to the view.
//Create and position the image view
UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake((firstCell.frame.size.width), (firstCell.frame.origin.y + 70), 300, 137)];
// Add border and round corners of image view to make style look a little like tableviewcells
[imageView.layer setBorderColor:[UIColor colorWithWhite:0 alpha:0.5].CGColor];
[imageView.layer setBorderWidth:2.0];
[imageView.layer setCornerRadius:5.0];
[imageView setClipsToBounds:YES];
//Set the image in the image view
UIImage *image = [UIImage imageNamed:#"defaultPicture.png"];
imageView.image = image;
//Set resizing of image view for when view is rotated
imageView.contentMode = UIViewContentModeRedraw;
imageView.autoresizingMask = UIViewContentModeScaleAspectFit;
//Add tap gesture for imageview to initiate taking picture.
imageView.userInteractionEnabled = YES;
UITapGestureRecognizer *imageViewTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(takePicture:)];
[imageView addGestureRecognizer:imageViewTap];
//Add image view to view
[self.view addSubview:imageView];
This has not been fully tested and i'm sure isn't a great implementation, but its a starting point for the effect i'm after. Please reply if you know of a better way.
Note: The above code is written for my app on the iPad but screenshots are from testing I did on iPhone
How would I draw a rectangle in a custom table cell class? The cell currently has a background image with a few text labels. I would like to draw a rectangle behind each of the labels so they are easier to read over the detailed background image.
I know I could just set the background colour of the label but I would like to have padding between the background colour and the text. If that is possible, I'd love to know how! :)
I'm subclassing a TTTableMessageItemCell in Three20, a method below gets called in which you can play with subviews of the cell,
- (void)layoutSubviews {
[super layoutSubviews];
CGFloat padding = 16;
CGFloat boxWidth = self.contentView.width - 2*padding;
CGFloat textWidth = boxWidth - (padding*2);
CGFloat textHeight = 100;
CGFloat top = kTableCellSmallMargin;
// Position Heading Text
_titleLabel.frame = CGRectMake(padding, top, textWidth, _titleLabel.font.ttLineHeight);
top += _titleLabel.height;
// Position Detail Text
[self.detailTextLabel sizeToFit];
self.detailTextLabel.top = top+2*padding;
self.detailTextLabel.left = 2*padding;
self.detailTextLabel.width = textWidth;
self.detailTextLabel.height = 100;
}
I would like the rectangles to be placed behind the _titleLable and detailTextLabel labels.
edit
I have been able to add the right box using the following,
UIView *view = [[UIView alloc] init];
view.backgroundColor = [UIColor whiteColor];
view.frame = CGRectMake(padding, top, textWidth, textHeight+2*padding);
[self insertSubview:view belowSubview:self.detailTextLabel];
It is laying on top of the label and I cant seem to get it behind it...
edit
I was adding the view to the wrong subview, fixed it with,
[[self.subviews objectAtIndex:0] insertSubview:view atIndex:0];
You can add the labels to views and these to the cell.
You could use insertSubview:belowSubview: to add views behind your labels. With backgroundColor and the right frame they will do what you intend to.
You can also bring detailLabel to front
I would like to know how Apple built the about view. It looks like that text is inside UITableView element but the whole cell is scrollable.
My guess would be a UIWebView inside a custom table cell.
But that is just a guess. It could be a completely custom view, or various combinations of existing views.
No custom views are needed. All you have to do is configure the text view's layer appropriately. Here's a recipe that produces pretty much the effect you're looking for, assuming you have a UITextView in a view with light gray background:
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad
{
[super viewDidLoad];
self.textView.clipsToBounds = NO;
CALayer *layer = self.textView.layer;
layer.cornerRadius = 10.0;
layer.borderWidth = 0.5;
layer.borderColor = [[UIColor grayColor] CGColor];
layer.shadowColor = [[UIColor whiteColor] CGColor];
layer.shadowOffset = CGSizeMake(0.0, 1.0);
layer.shadowOpacity = 1.0;
layer.shadowRadius = 0.5;
}
I had some trouble getting the white shadow to display. This SO question explains that you need to set clipsToBounds to NO in order to get the shadow to work.
Here's a picture of the result. I've shown the bottom corner so that you can see the white drop shadow.
Edit: I see now that the view in the question probably is, in fact, a UIWebView. I think it's possible to embed inline images in a NSTextView, but that's probably not the case with UITextView. Anyway, the recipe above should work as well for a UIWebView as it does for UITextView (or any other view).
You can achieve this with a stock UITextView; it's a subclass of UIScrollView, so you can just add the logo imageview as a subview. Then, make room for the image on top by adjusting the text padding:
textView.contentInset = UIEdgeInsetsMake(80,0,0,0);
If you have a tableview that has one section, one row, and the row has a view (UILabel or UITTextField) that is larger than the visible area on the screen, that would scroll like that. Or maybe just a UIScrollView with a UILabel in it.
I have a table cell being displayed that shows a users image, name and some text. The user's image is 50x50, but I want a border around it so I set the view to center the image and set the frame to 52x52 and then set the background color of that view to my border color. That shows a 1 pixel border around the image.
I also want to show a 30 pixel wide border on the right of the cell when the cell is selected. I've tried to do that by creating a UIView the size of the cell's frame, then adding a subview to that view with a UIView the width and background color I would like. I then set that view to the selectedBackgroundView of the cell.
The problem here is that the cell's selectedBackgroundView gets applied to the background of all views inside the cell. So when I select a cell, the images "border" gets set to the cell's selected background color, the other 30px "border" I'm adding gets changed to that background color also.
Code inside my cellForRowAtIndexPath:
cell = (UserCellView *) currentObject;
UIView *c = [[UIView alloc ] initWithFrame:CGRectMake(0, 0, 30, cell.frame.size.height)];
c.backgroundColor = [[UIColor alloc] initWithRed:64/255.0 green:64/255.0 blue:64/255.0 alpha:1.0];
UIView *v = [[UIView alloc ] initWithFrame:cell.frame];
v.backgroundColor = [[UIColor alloc] initWithRed:35/255.0 green:35/255.0 blue:35/255.0 alpha:1.0];
[v addSubview:c];
cell.selectedBackgroundView = v;
[c release];
[v release];
I'll assume that you haven't actually tested what's going on to form your analysis that it "gets applied to the background of all views inside the cell".
I did something like this:
#interface TestView : UIView {
}
#end
#implementation TestView
-(void)setBackgroundColor:(UIColor*)c {
// Breakpoint here.
NSLog("setBackgroundColor: %#",c);
[super setBackgroundColor:c];
}
#end
...
UIView * v = [[[UIView alloc] initWithFrame:(CGRect){{0,0},{20,20}}] autorelease];
v.backgroundColor = [UIColor magentaColor];
UIView * v2 = [[[TestView alloc] initWithFrame:(CGRect){{5,5},{10,10}}] autorelease];
v2.backgroundColor = [UIColor yellowColor];
[v addSubview:v2];
cell.selectedBackgroundView = v;
The end result is that -setBackgroundColor: is called from -[UITableViewCell _setOpaque:forSubview:] when the view is selected, with something like UIDeviceWhiteColorSpace 0 0 (i.e. [UIColor clearColor]).
Or, in other words, the background colour of some of the subviews are set to [UIColor clearColor] while the cell is selected, allowing selectedBackgroundView to show through. I think this happens because a common optimization is to give textLabel/detailTextLabel the table's background colour (e.g. white) so it draws faster, but this means the background colour has to be reset when the cell is selected.
The easiest fix is to use an image instead: a 1-by-1-pixel image of the correct colour in a UIImageView will work, if a bit messy. (I had this problem when drawing custom separator lines with 1-pixel-high UIViews, so I just included the separator into the background image.)
An alternative fix is to use a CALayer instead: Add a 52x52 sublayer to the UIImageView's layer, and set the sublayer's background colour. I'm pretty sure UITableViewCell simply walks the view hierarchy, so it should ignore custom layers. (The big disadvantage with layers is that they don't auto-size, which made them unsuitable for my purposes, and means the 30px right border won't auto-size.)
A workaround is to subclass the relevant views and ignore -setBackgroundColor: if it's equal to [UIColor clearColor].
A simple but obnoxious-to-maintain solution is to override setSelected:animated: and setHighlighted:animated: with implementations re-setting the various backgrounds you want. Something along the lines of:
- (void)setSelected:(BOOL)selected animated:(BOOL)animated
{
[super setSelected:selected animated:animated];
self.childView.backgroundColor = [UIColor blueColor]; // whichever you want
}
First add this to your file
#import <QuartzCore/QuartzCore.h>
Then turn your view into an image with...
UIView *rowView = [[UIView alloc] initWithFrame:CGRectMake(0.0, 0.0, 1.0, 60.0)];
rowView.backgroundColor = [UIColor colorWithRed:35/255.0 green:35/255.0 blue:35/255.0 alpha:1.0];
UIGraphicsBeginImageContext(rowView.bounds.size);
[rowView.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *yourImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
Then instead of adding a UIView to your cell, just add a UIImageView with "yourImage".
A simple solution if the affected view can be a custom subclass is to override -setBackgroundColor:
- (void)setBackgroundColor:(UIColor *)color
{
// Ignore requests and do nothing
}
Thus UITableViewCell's attempt to set the colour will go ignored. Code in the custom view which really does want to set the background colour needs to call super:
- (void)setColor:(UIColor *)color
{
[super setBackgroundColor:color];
}
(or could probably message the underlying CALayer directly)
you will need to customize the contentView of the cells and handle the delegate tableView:cellForRowAtIndexPath
See Posting Here