I've got a problem with rotating NSView
Let's say I have a NSImageView like this:
sampleImage = [[NSImageView alloc] initWithFrame:CGRectMake(50,50,50,50)];
sampleImage.image = [NSImage imageNamed:#"image"];
[self.view addSubview:sampleImage];
That looks like this:
Now I want to rotate this image by 60 degrees. I've tried several solutions to this problem, but none of them gave me satisfactory results.
I've tried with:
[sampleImage rotateByAngle:60];
results looks like this:
[sampleImage setFrameCenterRotation:60];
results:
Using AffineTransform and layers (I've set up wantsLayer = YES for superviews as well) doesn't rotate image at all:
sampleImage.wantsLayer = YES;
sampleImage.layer.affineTransform = CGAffineTransformMakeRotation(60);
rotating with CATransform3DMakeRotation doesn't work as well:
sampleImage.transform = CATransform3DMakeRotation(GLKMathRadiansToDegrees((float) -marker.rotation), 0, 0, 1.0);
What is proper method to rotate images in OSX ? On IOS it's piece a cake: applying proper affineTransform work's like a charm - it looks like Cocoa on OSX isn't so willing to rotate views.
Related
I tried to get a circle image using layer, here is my code
_compassArrow.layer.cornerRadius = _compassArrow.frame.size.width / 2;
_compassArrow.layer.masksToBounds = YES;
_compassArrow.layer.borderColor = [UIColor whiteColor].CGColor
the compassArrow is an imageview which display the compass image. And when I run my program, it looks terrible:
my actual picture
I don't know what happened to it. I've add some constraints to it, to make it has equal width with the device. Does this influence my image?
I think you set cornerRadius before your constraints are applied. Try to put this code in layoutSubviews or viewDidLayoutSubviews for example.
This way, the _compassArrow.frame.size.width value will be the one after constraints applied on it, and you'll get the correct cornerRadius.
Here is a piece of code that should allow you to do this.
_compassArrow.layer.borderWidth = 1.0
_compassArrow.layer.masksToBounds = false
_compassArrow.layer.borderColor = UIColor.whiteColor().CGColor
_compassArrow.layer.cornerRadius = profilePicture.frame.size.width/2
_compassArrow.clipsToBounds = true
I want to create a black UIView with transparent circles.
I think about create one view (with black color and transparence 50%), and add multiple circles inside of it, but I don't know how to set the transparence for each. I know how to create a circle View (an example: how to draw a custom uiview that is just a circle iphone-app).
I want to do is something like iShowcase library but with multiple dots:
Any clue? thanks.
SOLVED
I took a look to the code of iShowcase library and I solved my probblem. now, I am working in a library based in iShowcase library.
I will post here when I finish it.
Please have a look of below link hope this will helpful for you.
Link : Here is Answer to set shadow in your view.
Use alpha for your circleView. As in your link example,then add as subviews in yourmainview:
UIView *circleView = [[UIView alloc] initWithFrame:CGRectMake(10,20,100,100)];
circleView.alpha = 0.5;
circleView.layer.cornerRadius = 50;
circleView.backgroundColor = [UIColor whiteColor];
[yourmainview addSubview: circleView];
Btw in your picture I think white circles have 100% alpha. You can use individual alpha for each circleView, or use a randomizer :)
As for updated example why don't you add more buttons and showcase in your h file, synthesize them and use multiple instances .... showcase setupShowcaseForTarget:btn_custom_1 title:#"title" details:#"other"]; ? I think you should modify main classes, becouse what you want are different containerView for multiple views [circles].
Using modifyed iShowcase.m [- (void) calculateRegion], and different views as containers, I was able to make something like: http://tinypic.com/view.php?pic=2iwao6&s=8#.VLPTRqYsRE8 So the answer is: use custom views for multiple showcase [ex [showcase2 setContainerView:self.view2];], then custom frame for each showcase [ showcase2.frame = CGRectMake(0,0,100,100);] I don;t habe time to fine tuning the example, but yes, you can achieve desired result...
I finally solved my question inspired by iShowCase library I did this simple class and Upload to github.
https://github.com/tato469/FVEasyShowCase
Simplest what you can do is to have your main view (black 50% transparant) and add shapes to the mask layer of that.
So basically:
//Set up your main view.
UIView* mainView = [UIView new];
mainView.backgroundColor = [UIColor blackColor];
mainView.alpha = 0.5;
UIView* circle1 = [YourCircleClassHere new];
UIView* circle2 = [YourCircleClassHere new];
UIView* circle3 = [YourCircleClassHere new];
UIView* container = [UIView new];
[UIView addSubview:circle1];
[UIView addSubview:circle2];
[UIView addSubview:circle3];
//Make a new layer to put images in to mask out
CALayer* maskLayer = [CALAyer layer];
//Assign the mask view to the contents layer.
maskLayer.contents = (id)container;
//This will set the mask layer to the top left corner.
maskLayer.frame = CGRectMake(0,0,container.frame.size.width,container.frame.size.height);
//Lastly you assign the layer to the mask layer of the main view.
mainView.layer.mask = maskLayer;
//Applies basically the same as clipToBounds, but a bit reversed..
mainView.layer.mask = true/false;
On a sidenote:
I achieved this with images "contents = (id) [UIImage CGImage]", but I'm sure it should work with UIViews as well.
Also mind some mistakes, since I just wrote this from my mind, also I didn't test this out.. So keep me updated if it works/!works ^_^
I know there's SKCropNode, but it will only fully in- or exclude pixels based on an alpha threshold of the maskNode. What I already tried is using the SKEffectNode with a CIBlendWithAlphaMask filter, but the result I'm getting is invisible and I also wouldn't be sure on how to move the mask around. Here's the code:
SKSpriteNode* overlay = [SKSpriteNode spriteNodeWithImageNamed:#"Overlay.png"];
//...
SKEffectNode* blendNode = [[SKEffectNode alloc] init];
blendNode.filter = [CIFilter filterWithName:#"CIBlendWithAlphaMask"];
UIImage* maskImage = [UIImage imageNamed:#"MaskImage.png"];
[blendNode.filter setValue:[maskImage CIImage] forKey:#"inputMaskImage"];
[blendNode addChild:overlay];
[self addChild:blendNode];
I already had figured out the perfect solution, using a SKLightNode to light the texture and then blend it into the framebuffer using SKBlendModeAdd, but for some reason it won't work on iPhone 5 (here's a related topic). I'm aware of this topic too, which didn't help either.
Any solution to properly alpha-mask a SKSpriteNode would be greatly appreciated!
Running iOS 8.
Using a dynamically generated CIImage as mask does the trick. It can be created by a CIFilter, using whatever gradient or image you need as mask, and setting the inputCenter property to the position you want.
I was going through the SpriteKit documentation by Apple and came across a really useful feature that I could use when programming my UI. The problem is I can't get it to work.
Please see this page and scroll down to "Resizing a Sprite" - Apple Docs
I have literally copied the image dimensions and used the same code incase I was doing something wrong. But I always end up with a stretched looking image rather than the correct "end caps" staying the same scale.
I am referring to this code:
SKSpriteNode *button = [SKSpriteNode spriteWithImageNamed:#"stretchable_button.png"];
button.centerRect = CGRectMake(12.0/28.0,12.0/28.0,4.0/28.0,4.0/28.0);
What am I doing wrong? Is there a step I have missed?
EDIT:
Here is the code I have been using. I stripped it of my button class and tried to use it with an SKSPriteNode but still the problem persists. I also changed the image just to make sure it wasnt that. The image im using is a 32x32 at normal size.
SKSpriteNode *button = [SKSpriteNode spriteNodeWithImageNamed:#"Button.png"];
[self addChild:button];
button.position = ccp(200, 200);
button.size = CGSizeMake(128, 64);
button.centerRect = CGRectMake(9/32, 9/32, 14/32, 14/32);
The .centerRect property works as documented if you adjust the sprites .scale property.
Try:
SKTexture *texture = [SKTexture textureWithImageNamed:#"Button.png"];
SKSpriteNode *button = [[SKSpriteNode alloc] initWithTexture:texture];
button.centerRect = CGRectMake(9/32, 9/32, 14/32, 14/32);
[self addChild:button];
button.xScale = 128.0/texture.size.width;
button.yScale = 64.0/texture.size.height;
9/32 is integer division, so the result passed to CGRectMake is zero. Ditto the other three parameters. If you use floating point literals like the example you cite, you might get better results.
Here's a refresh of how exactly this works. By the way, my image size width is 48 pixels and height is 52 pixels, but this doesn't matter at all. Any image can be used:
SKSpriteNode *button = [SKSpriteNode spriteNodeWithImageNamed:#"Button.png"];
//(x, y, width, height). First two values are the four corners of the image that you DON'T want touched/resized (They will just be moved).
//The second two values represent how much of images width & height you want cut out & used as stretching material. Cut out happens from the center of the image.
button.centerRect = CGRectMake(20/button1.frame.size.width, 20/button1.frame.size.height, 5/button1.frame.size.width, 15/button1.frame.size.height);
button.position = CGPointMake(self.frame.size.width/2, self.frame.size.height/2); //Positions sprite in the middle of the screen.
button.xScale = 4; //Resizes width (This is all I needed).
//button.yScale = 2; //Resizes height (Commented out because I didn't need this. You can uncomment if the button needs to be higher).
[self addChild:button];
Read the section called "Resizing a Sprite" in this document: https://developer.apple.com/library/ios/documentation/GraphicsAnimation/Conceptual/SpriteKit_PG/Sprites/Sprites.html#//apple_ref/doc/uid/TP40013043-CH9-SW10
'Figure 2-4 A stretchable button texture' demonstrates how the (x, y, width, height) works.
Based on rwr's answer here is a working init method for a SKSpriteNode. I use this in my own game. Basically you make insets of 10px all around the the output image. And then call it like this:
[[HudBoxScalable alloc] initWithTexture:[atlas textureNamed:#"hud_box_9grid.png"] inset:10 size:CGSizeMake(300, 100) delegate:(id<HudBoxDelegate>)clickedObject];
-(id) initWithTexture:(SKTexture *)texture inset:(float)inset size:(CGSize)size {
if (self=[super initWithTexture:texture]) {
self.centerRect = CGRectMake(inset/texture.size.width,inset/texture.size.height,(texture.size.width-inset*2)/texture.size.width,(texture.size.height-inset*2)/texture.size.height);
self.xScale = size.width/texture.size.width;
self.yScale = size.height/texture.size.height;
}
return self;
}
I'm shrinking a UIImageView but it's looks horrible and aliased.
I've tried changing the 'minifactionFilter' property but I don't see any effects.
Is there a special way to implement this? There's not much info in apple's docs.
self.imageView.layer.minificationFilter = kCAFilterLinear;
self.imageView.layer.cornerRadius = 9.0;
self.imageView.layer.masksToBounds = YES;
I know the layer properties are working as I can see the round corners but interpolation always looks the same.
kCAFilterNearest
kCAFilterLinear
kCAFilterTriLinear