I have moving sprites in my game and have added labels on it (CCLabelTTF). The labels have characters like A, B, C etc. I want to give a shadow effect to the contents of labels so that they are properly visible.
in .h file i have
CCLabelTTF *label;
and in .m i have set its position and color. "target" is the sprite on which there are labels.
target=[CCSprite spriteWithFile:[NSString stringWithFormat:#"balloon%d.png",enType] rect:CGRectMake(0, 0, 100, 119)];
label = [[CCLabelTTF alloc] initWithString:alphabetValue dimensions:CGSizeMake([target contentSize].width, [target contentSize].height)
alignment:UITextAlignmentCenter fontName:#"verdana" fontSize:30.0f];
//LABEL POSITION HERE
label.position = ccp(55,30);
label.color = ccc3(60,60,60);
[target addChild:label z: 10];
Now i want to give a shadow effect...how can i do so?
Add the same label twice, one time slightly bigger. The shadow label should be created first to make it appear behind the actual label, or use the z property.
CGSize size = CGSizeMake([target contentSize].width, [target contentSize].height);
labelShadow = [[CCLabelTTF alloc] initWithString:alphabetValue
dimensions:size
alignment:UITextAlignmentCenter
fontName:#"verdana" fontSize:30.0f];
labelShadow.position = ccp(55+2,30+2); // slightly offset
labelShadow.color = ccc3(10,10,10);
[target addChild:labelShadow z:10];
label = [[CCLabelTTF alloc] initWithString:alphabetValue
dimensions:size
alignment:UITextAlignmentCenter
fontName:#"verdana" fontSize:30.0f];
label.position = ccp(55,30);
label.color = ccc3(60,60,60);
[target addChild:label z:10];
You can also experiment with slightly scaling the labelShadow up, or increasing its fontSize.
Note: it's not going to create a soft (blurred) shadow. For that you could use the texture filter methods available here.
Related
How am I able to create an SKLabelNode and set the width and height of it. I have thought about just making a sprite image with the word on and then position that sprite but I don't believe that this is the best way of doing this.
Image:
http://i.imgur.com/dAP6yeT.png
Thanks!
I think that the best way of doing what you are asking is doing what you said. Just make an image of the word. This makes it to where you can also use it as a button. It might subtract some fps, but only if you have about 50+ nodes in your scene. Which is not likely since most people put a label on the menus. But if you do want to resize the SKLabelNode just resize the tex like this. label.fontsize = 20
The following code will add a node with the text you supply with a box around it. The border will be a rectangle that corresponds to the size of the text. If you want it square, just adjust the borderPath points to only use the labelNode.frame.size.width/2 for both horizontal and vertical spacing. Adjust the +/- 10 to the amount of spacing around the text you want.
//create the wrapper node
float initialWidth = 50;
float initialHeight = 50;
SKSpriteNode *parentNode = [SKSpriteNode spriteNodeWithColor:[UIColor whiteColor] size:CGSizeMake(initialWidth, initialHeight)];
//create the label node
NSString *FontName = [UIFont boldSystemFontOfSize:10].fontName;
SKLabelNode *labelNode = [SKLabelNode labelNodeWithFontNamed:FontName];
labelNode.text = #"some text";
labelNode.fontColor = [UIColor blackColor];
labelNode.position = CGPointMake(0, -labelNode.frame.size.height/4);
//create the border node
SKShapeNode *borderNode = [SKShapeNode new];
UIBezierPath* borderPath = [[UIBezierPath alloc] init];
[borderPath moveToPoint:CGPointMake(-labelNode.frame.size.width/2 -10, -labelNode.frame.size.height/2 -10)];
[borderPath addLineToPoint:CGPointMake(labelNode.frame.size.width/2 +10, -labelNode.frame.size.height/2 -10)];
[borderPath addLineToPoint:CGPointMake(labelNode.frame.size.width/2 +10, labelNode.frame.size.height/2 +10)];
[borderPath addLineToPoint:CGPointMake(-labelNode.frame.size.width/2 -10, labelNode.frame.size.height/2 +10)];
[borderPath addLineToPoint:CGPointMake(-labelNode.frame.size.width/2 -10, -labelNode.frame.size.height/2 -10)];
borderNode.path = borderPath.CGPath;
borderNode.lineWidth = 10.0;
[borderNode setStrokeColor:[UIColor blackColor]];
//add it all together and present it
[parentNode addChild:borderNode];
[parentNode addChild:labelNode];
parentNode.position = newShapeScenePoint;
parentNode.size = CGSizeMake(labelNode.frame.size.width +10, labelNode.frame.size.height +10);
[myScene addChild:parentNode];
You can move the entire thing with
parentNode.position = CGPointMake(someNewX, someNewY)
You can resize the entire thing (including the text) with
float bigger = 3.0; //or whatever size you want
parentNode.xScale = bigger;
parentNode.yScale = bigger;
I have added a label to my scene with the following code:
SKLabelNode *myLabel = [SKLabelNode labelNodeWithFontNamed:#"Chalkduster"];
myLabel.name = #"scoreCounter";
myLabel.text = ;
myLabel.fontSize = 30;
myLabel.position = CGPointMake(50, 25);
[self addChild:myLabel];
How can i have the label display a number that will change when my objects reach a certain x point? Or is there a way to have the label change whenever a node is removed from its parent. Basically, whenever one of my objects reach 360 on the x axis, i want the label to go up one, to represent score. How can i do this?
since you have named this label,you can find this label by it's name,and change the text.
SKLabelNode *node = [SKLabelNode labelNodeWithFontNamed:#"scoreCounter"];
node.text = #"other string";
I would like to create a UIView which would show a colored circle with a number or character in it. I have seen examples to create a circle, but how would I accomplish this?
I would want to place multiple of these views on the screen and connect them with lines.
Any suggestions?
// Swift, iOS8
var letterLabel = UILabel(frame: CGRect(x: 50, y: 0, width: 100, height: 100))
letterLabel.layer.cornerRadius = 50
letterLabel.textAlignment = NSTextAlignment.Center
letterLabel.layer.borderWidth = 10
letterLabel.layer.backgroundColor = UIColor.blueColor().CGColor
letterLabel.font = UIFont(name: "Hoefler Text", size:75.0)
letterLabel.text = "A"
If you already know how to draw a circle, then you've got half of it solved :) Let's say the circle is drawn in a UIView called circleView.
Now you want to create a UILabel to draw the letter in.
UILabel* circleLabel = [[UILabel alloc] init];
[circleLabel setText:#"letter goes here"];
And now you want to put the label on top of the circleView, so you add it as a subview:
[circleView addSubview:circleLabel];
At this point, depending on the size of circleView and the font size of circleLabel, the label may or may not be in the center of the circle. Use the setFrame function on the circleLabel to adjust its position within the circleView.
How can I get an image behind my labels within my graph. I succeeded with putting an image in front of the graph with:
CPTPlotSpaceAnnotation *imageAnnotation;
CGRect imageRect = CGRectMake(0, 0 , 480, 320);
CPTBorderedLayer * ImageLayer = [[CPTBorderedLayer alloc] initWithFrame:imageRect];
ImageLayer.fill = [CPTFill fillWithImage:[CPTImage imageWithCGImage:[[UIImage imageNamed:#"Overlay_3_digits.png"] CGImage]]];
imageAnnotation = [[CPTPlotSpaceAnnotation alloc] initWithPlotSpace:plotSpace anchorPlotPoint:nil];
imageAnnotation.contentLayer = ImageLayer;
[graph addAnnotation:imageAnnotation];
[graph addSublayer:ImageLayer];
[newImagelLayer release];
[imageAnnotation release];
adding the image with [graph insertSubLayer:ImageLayer below:y]; didn't worked, this also puts the image in front of the graphs and axislabels. Hope someone can help me out.
EDIT:
I added a screenshot from the simulator. The three black rectangles needs to be in front of my plots and behind my labels. The labels will be readible more easily.
I also editted the hierarchy of layers from my graph by putting the axislabels at the first index:
NSArray *chartLayers = [[NSArray alloc] initWithObjects:[NSNumber numberWithInt:CPTGraphLayerTypeAxisLabels],
[NSNumber numberWithInt:CPTGraphLayerTypePlots],
[NSNumber numberWithInt:CPTGraphLayerTypeMajorGridLines],
[NSNumber numberWithInt:CPTGraphLayerTypeMinorGridLines],
[NSNumber numberWithInt:CPTGraphLayerTypeAxisLines],
[NSNumber numberWithInt:CPTGraphLayerTypeAxisTitles],
nil];
graph.topDownLayerOrder = chartLayers;
I also found a better way of putting my image inside the graph. I did this by means of a new hostlayer:
CPTAnnotationHostLayer *newHostLayer = [[CPTAnnotationHostLayer alloc]
initWithFrame:CGRectMake(0, 0, 480, 220)];
UIImage * annotationBG = [UIImage imageNamed:#"Overlay_3_digits.png"];
newHostLayer.backgroundColor = [UIColor colorWithPatternImage:annotationBG].CGColor;
Any ideas how I can put the three black triangle image at the back of my labels and in front of the plots?
The -addAnnotation: method takes care of updating the layer tree; you should remove your call to -addSublayer:.
Do you want the image to completely fill the background behind the graph? If so, just set the fill on the graph instead of making an annotation.
graph.fill = [CPTFill fillWithImage:[CPTImage imageWithCGImage:[[UIImage imageNamed:#"Overlay_3_digits.png"] CGImage]]];
To put the box behind each label, you can use custom labels. Build a CPTBorderedLayer the same way you did for the annotation. Add a CPTTextLayer with the label text as a sublayer of the bordered layer. Make the bordered layer the contentLayer of the custom label. This should remove the need to change the topDownLayerOrder, too.
I know title of my question is so bad, but I don't know how to describe it.
When an UIAlertView pops up, anything else on the screen (except the UIAlertView) becomes a bit darker but can be seen. I call this as Focus effect, because you will know clearly and directly that now the UIAlertView is the focus.
So how can I implement such a focus effect?
thanks
Just add a translucent view below the view you want to "focus" on.
Simple example:
UIView *shieldView = [[[UIView alloc] initWithFrame:myView.bounds] autorelease];
shieldView.backgroundColor = [UIColor colorWithWhite:0.0 alpha:0.7];
[myView.superview insertSubview:shieldView belowSubview:myView];
UIAlertView actually uses an image with a radial gradient instead of a simple color, in order to highlight the center of the view.
I know this post is a bit old but I thought it might help someone.
Use this code to generate the radial gradient background:
- (UIImage *)radialGradientImage:(CGSize)size start:(float)start end:(float)end centre:(CGPoint)centre radius:(float)radius{
UIGraphicsBeginImageContextWithOptions(size, YES, 1);
size_t count = 2;
CGFloat locations[2] = {0.0, 1.0};
CGFloat components[8] = {start, start, start, 1.0, end, end, end, 1.0};
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
CGGradientRef grad = CGGradientCreateWithColorComponents (colorSpace, components, locations, count);
CGColorSpaceRelease(colorSpace);
CGContextDrawRadialGradient (UIGraphicsGetCurrentContext(), grad, centre, 0, centre, radius, kCGGradientDrawsAfterEndLocation);
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
CGGradientRelease(grad);
UIGraphicsEndImageContext();
return image;}
Define gradient in the .h file like so:
UIImageView *gradient;
Call your gradient like so:
- (void)addGradient{
CGSize size = self.view.bounds.size;
CGPoint centre = CGPointMake(self.view.bounds.size.width/2, self.view.bounds.size.height/2);
float startColor = 1.0f;
float endColor = 0.0f;
float radius = MIN(self.view.bounds.size.width/4, self.view.bounds.size.height/4);
gradient = [[UIImageView alloc] initWithImage:[self radialGradientImage:size
start:startColor
end:endColor
centre:centre
radius:radius]];
[gradient setBackgroundColor:[UIColor clearColor]];
[gradient setUserInteractionEnabled:YES];
[gradient setAlpha:0.6f];
[self.view addSubview:gradient];}
UIAlertView works like this. It fades in an alpha mask image to dim out the background. Once that animation is finished it starts the "bounce in" animation of the dialog.
So to reproduce it you need first to generate an alpha mask with a "bright spot" where your dialog will end up and fade that in. Then use a (few) frame animation(s) to get the bounce effect.
More info here: Creating a Pop animation similar to the presentation of UIAlertView
To make it better than "not good" you could ...
create a UIView in a nib (easiest if the part of your code where you need the effect is already utilising a nib) and then add a translucent graphic (with a 'focus' effect) to that view.
connect the UIView in the nib to an IBOutlet
fade in the graphic using an animation into view hierarchy (omz example shows this)