Is it possible to hide the separator between the cells of an UITableView?
But it should configure-able for each cell seperate (so not for the whole TableView).
What I already tried out is:
UIView *backView = [[[UIView alloc] initWithFrame:CGRectZero] autorelease];
backView.backgroundColor = UIColorFromRGB(CELL_COLOR_DEFAULT);
cell.backgroundView = backView;
The only problem here is, that on the left and right side is also no border, but here I would need it.
Thanks
NG
So are you trying to have a border around the entire cell or just the separator?
You could try adding something like
cell.layer.borderColor = [[UIColor blackColor]CGColor];
cell.layer.borderWidth = 10.0f;
to your cellForRowAtIndexPath method (you can decide whether to display the border for a given cell than as well).
Related
I want to create a seamless background color a tableview row, however I see it breaks at the end of the cell which I suspect is the part where the imageView is. what is the best way to have a continuous color on the whole row of the NSTableView just like the alternatingRow color? This is what I get when I do
cellView.wantsLayer = YES;
cellView.layer.backgroundColor = [NSColor redColor].CGColor;
I am using touchesBegan and touchesMoved to move a UIImageView to wherever you touch on the screen. It moves a marker (the UIimageView I moved), draws a shape in the UIImageview and reads off a graph.
However whenever I try to do anything with that data eg update a label, the UIImageView scurries back to the place it started instead of staying where it is.
-(void) touchesBegan:(NSSet*)touches withEvent:(UIEvent*)event{
UITouch *myTouch =[[event allTouches] anyObject];
CGPoint location = [myTouch locationInView:self.view];
int x = location.x;
int y = location.y;
NSLog(#"x = %i",x);
NSLog(#"y = %i",y);
CGPoint p={x, y};
circles.center = p;
The code above works fine and moves the image to its new location. However, should I add somethig really simple like
changeInY.text = [NSString stringWithFormat:#"Main Label"];
and the UIImageView (circles) is no longer at .center = p. The label updated and the UIImageView rushed back to the place I dumped it on the storyboard before any touches were made. It definitely moves, but rushes back. Without the label instruction it stays where it is and completes the next touch.
It will give my x-position and y-postition and let me print them in an NSLog statement, but it won't let me update a label with their values, or do anything that isn't to do with that UIImageView.
I don't want to dynamically create a UIImageView at runtime. I want to use that one and move it.
I'm fairly sure its the circles.center = p line that needs changing, but I don't know how to tell it to make that change and stay there.
Any help would be very welcome
Turns out after about 14 hours of rewriting the code in every conceivable manner, that I just needed to place the offending label on top of a 'view' box. I had some kind of layering issue. Once the label was placed on an invisible 'View' almost every combination of code I have tried in the last two days worked.
I need to make a simple scroll view in xcode with width of 280 and height of 80 and with images inside thats scrolls horizontally. i want to make this programmatically.
I assume you mean the UIScrollview, which has a guide written by apple found here:
http://developer.apple.com/library/ios/#documentation/uikit/reference/UIScrollView_Class/Reference/UIScrollView.html
A guide that I personally used was this one:
http://idevzilla.com/2010/09/16/uiscrollview-a-really-simple-tutorial/
I'll take you through the quick basics of adding the scrollview to your view and adding images to it.
I'm guessing you're new to Objective C, so I'll give you a quick guide. Firstly, you'll want to make a UIScrollView object. This is done by declaring the following:
UIScrollView *aScrollView = [[UIScrollView alloc] initWithFrame:CGRectMake (0,0,320,250)];
You'll notice I set the frame. The first two numbers of CGRectMake give you the x and y origin of the point while the last two numbers are for how wide and tall you want your object to be.
Afterwards, you'll want to add images to it. You'll need a UIImageview.
UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 320, 250)];
Note that I positioned the image at 0,0, giving it a height of a 250 and a width of 320. This ensures that it fills entire scrollview's initial view.
imageView.image = [UIImage imageNamed:#"foo.png"];
You'll attach an image to the imageView. But wait, there's more. So far you've created these objects but have not yet associated them with the view. So if we are in a ViewController class (you'll have to look up what that is), the ViewController contains a view. We can attach our objects to the view.
[aScrollView addSubview:imageView]; // Adds the image to the scrollview
[self.view addSubview:aScrollView]; // Adds the scrollview to the view.
If you want to add more images, you have to add them at different x origins. So our first added image was at 0,0. Our next added image should be at 320,0 (because the first image took up 320 pixels width).
UIImageView *secondImageView = [[UIImageView alloc] initWithFrame:CGRectMake(320, 0, 320, 250)];
secondImageView.image = [UIImage imageNamed:#"bar.png"];
[aScrollView addSubview:secondImageView];
There are a number of options for scrollview that you will want to explore. The ones I found useful were:
aScrollView.delegate = self; // For gesture callbacks
self.pagingEnabled = TRUE; // For one-at-a-time flick scrolling
self.showsHorizontalScrollIndicator = NO; // Cleaner look for some apps.
self.alwaysBounceHorizontal = TRUE; // Look it up.
I use the following method to display the labels for my plot:
-(CPTLayer *)dataLabelForPlot:(CPTPlot *)plot recordIndex:(NSUInteger)index{
...
CPTTextLayer *label=[[CPTTextLayer alloc] initWithText:stringValue style:textStyle];
}
which for every index should return the label
I know that it's possible to move label up or down using:
plot.labelOffset=10;
The question is: how can i move the label a bit to the right?
I tried to use
label.paddingLeft=50.0f;
but it doesn't work.
Adding padding as in your example does work, but maybe not in the way you expect. Scatter and bar plots will center the label above each data point (with a positive offset). The padding makes the whole label wider so when centered, the test appears off to the side. It's hard to control, especially if the label texts are different lengths.
There is an outstanding issue to address this (issue 266). No guarantees when it will be fixed, but it is something we're looking at.
I ran into the same problem and came up with a different solution.
What I decided to do was to create the label using the CPTAxisLabel method initWithContentLayer:
CPTTextLayer *textLayer = [[CPTTextLayer alloc] initWithText:labelStr style:axisTextStyle];
CGSize textSize = [textLayer sizeThatFits];
// Calculate the padding needed to center the label under the plot record.
textLayer.paddingLeft = barCenterLeftOffset - textSize.width/2.0;
CPTAxisLabel *label = [[CPTAxisLabel alloc] initWithContentLayer:textLayer];
Here barCenterLeftOffset is the offset of the center of the plot record.
I wrote an article about this:
http://finalize.com/2014/09/18/horizontal-label-positioning-in-core-plot-and-other-miscellaneous-topics/
A demo project I created that uses this solution can be found at:
https://github.com/scottcarter/algorithms
You can subclass CPTTextLayer and include an offset.
#interface WPTextLayer : CPTTextLayer
#property (nonatomic) CGPoint offset;
#end
#implementation WPTextLayer
-(void)setPosition:(CGPoint)position
{
CGPoint p = CGPointMake(position.x + self.offset.x, position.y + self.offset.y);
[super setPosition:p];
}
Then Use:
WPTextLayer *tLayer = [[WPTextLayer alloc] initWithText:#"blah" style:textStyle];
tLayer.offset = CGPointMake(3, -3);
return tLayer;
There may be consequences of this that I'm not aware of, but it seems to be working so far.
I have implemented a view-based NSOutlineView in my project. I am using floating group rows. Now, I would like to have this NSOutlineView look basically like the Finder list-view (CMD-2) when it is in the "arranged-by" layout (e.g. "by kind": CTRL-CMD-2). That means, the top-most group row should display the column titles and as soon as the next lower group row is starting to nudge the previous one out of the view, the column titles fade in on the second group row (I hope this makes sense).
Is there any out-of-the-box way to achieve this? So far I have successfully subclassed NSTableCellView to show the columns' titles, however, I cannot get the fade-in to work as I cannot seem to find out the position of the group row in relation to the floating one above it.
Regards,
Michael
I've found a possible way to achieve what I want. In my custom NSTableCellView's drawRect: method, it's of course possibly in a nasty way to find out the view's position relative to the enclosing NSClipView. The relevant code:
- (void)drawRect:(NSRect)dirtyRect {
// _isGroupView is a member variable which has to be set previously
// (usually in setObjectValue:) in order for us to know if we're a
// group row or not.
if (_isGroupView) {
// This is the nasty party:
NSClipView *clipView = (NSClipView*)self.superview.superview.superview;
if (![clipView isKindOfClass:[NSClipView class]]) {
NSLog(#"Error: something is wrong with the scrollbar view hierarchy.");
return;
}
NSRect clipRect = [clipView documentVisibleRect];
CGFloat distanceToTop = self.superview.frame.origin.y - clipRect.origin.y;
if (self.superview.frame.origin.y - clipRect.origin.y < self.frame.size.height) {
// This means, that this NSTableCellView is currently pushing the
// view above it out of the frame.
CGFloat alpha = distanceToTop / self.frame.size.height;
NSColor *blendColor = [[NSColor blackColor] blendedColorWithFraction:alpha ofColor:[NSColor whiteColor]];
// ...
// do stuff with blendColor
// ...
// blendColor should now be the appropriate color for the wanted
// "fade in" effect.
//
}
}
}
I hope this makes sense ;-). Any tips are still appreciated!
Cheers,
Michael