cabasicanimation

CABasicAnimation - Setting start stroke position

由 萝らか妹 提交于 2019-12-06 01:31:22
问题 I'm animating the drawing of a basic circle. This works fine, except the animation begins drawing at the 3 o'clock position. Does anyone know how I can make it start at 12 o'clock? self.circle = [CAShapeLayer layer]; self.circle.fillColor = nil; self.circle.lineWidth = 7; self.circle.strokeColor = [UIColor blackColor].CGColor; self.circle.bounds = CGRectMake(0, 0, 200, 200); self.circle.path = [UIBezierPath bezierPathWithOvalInRect:self.circle.bounds].CGPath; [self.view.layer addSublayer:self

How to stop UIView CABasicAnimation in iPhone

由 ╄→гoц情女王★ 提交于 2019-12-05 01:28:50
I have 3 views dynamically created by using for loop. in that i called the below method for rotation animation - (void)runRightSpinAnimationOnView:(UIView*)view duration:(CGFloat)duration rotations: (CGFloat)rotations repeat:(float)repeat; { CABasicAnimation* rotationAnimation; rotationAnimation = [CABasicAnimation animationWithKeyPath:@"transform.rotation"]; rotationAnimation.fromValue = [NSNumber numberWithFloat:0]; rotationAnimation.toValue = [NSNumber numberWithFloat:((360*M_PI)/180)]; //rotationAnimation.toValue = [NSNumber numberWithFloat: M_PI * 2.0 /* full rotation*/ * rotations *

Incorrect position of CAShapeLayer

由 浪尽此生 提交于 2019-12-04 21:04:21
I have a UIView called viewProgress . It is the white box in the image. I want a circular progress bar, which is the green circle in the image. The progress bar should stay within the white box, but as you can see it is way off. How do I make it stay inside the viewProgress ? Here you have my animation function: func animateView() { let circle = viewProgress // viewProgress is a UIView var progressCircle = CAShapeLayer() let circlePath = UIBezierPath(arcCenter: circle.center, radius: circle.bounds.midX, startAngle: -CGFloat(M_PI_2), endAngle: CGFloat(3.0 * M_PI_2), clockwise: true)

NSImage rotation in NSView is not working

由 对着背影说爱祢 提交于 2019-12-04 18:48:43
I am trying to rotate an NSImage inside a NSView., First I will show you what I have done so far. Image : Header file #import <Foundation/Foundation.h> #import <QuartzCore/QuartzCore.h> @interface AppController : NSObject { CALayer *syncFirst; } @property (weak) IBOutlet NSView *nsview; - (IBAction)buttonClicked:(id)sender; - (CGImageRef) convertToCGImageFromNasImage:(NSImage *) image; @end Implementation file, only related methods - (void)awakeFromNib { NSImage *image = [NSImage imageNamed:@"SyncRing.png"]; //init layer syncFirst = [CALayer layer]; //animatated content size init syncFirst

Fade background-color from one color to another in a UIView

由 跟風遠走 提交于 2019-12-04 13:08:12
问题 How can I fade from one background-color to another color in a UIView? In javascript (jQuery) it can be done by doing the following: $('body').animate({ backgroundColor: "#ff00ff"}); Would it be easier if I converted the colors to HSV? EDIT: Tried to do it with CABasicAnimation but it flashes white for unknown reasons. :/ CABasicAnimation* fade = [CABasicAnimation animationWithKeyPath:@"backgroundColor"]; fade.fillMode = kCAFillModeForwards; fade.removedOnCompletion = NO; // fade.fromValue =

Trying to delay CABasicAnimation position and opacity of layer by 3 seconds but

由 纵然是瞬间 提交于 2019-12-04 10:35:29
问题 I am trying to delay the animation of layer's opacity and position by 3 seconds using setBeginTime. I have called the layer boxLayer. The animation is going well however during the first 3 seconds (the layer is not supposed to show yet) the layer is displayed at its final position and opacity. It should not. Group animation does not resolve the issue. Could anyone help? See code below: // Create an animation that will change the opacity of a layer CABasicAnimation *fader = [CABasicAnimation

Animate CALayer hide

由 限于喜欢 提交于 2019-12-04 07:24:31
I'm trying to hide a CALayer after a few microseconds and I'm using CABasicAnimation to animate the hide. At the moment I'm trying to use [aLayer setHidden:YES]; CABasicAnimation * hideAnimation = [CABasicAnimation animationWithKeyPath:@"hidden"]; [hideAnimation setDuration:aDuration]; [hideAnimation setFromValue:[NSNumber numberWithBool:NO]]; [hideAnimation setToValue:[NSNumber numberWithBool:YES]]; [hideAnimation setBeginTime:0.09]; [hideAnimation setRemovedOnCompletion:NO]; [hideAnimation setDelegate:self]; [alayer addAnimation:hideAnimation forKey:@"hide"]; But when I run this, the layer

Animate Background Color Of UIButton from WhiteColor to RedColor

由 守給你的承諾、 提交于 2019-12-04 07:10:31
I'm trying to making a kind of color pulse effect animating background color of a UIButton to make it change continously from a color (WhiteColor) to another one (RedColor). I'm trying to use CABasicAnimation for changing Opacity but I can't make it work with color too. CABasicAnimation *theAnimation; theAnimation=[CABasicAnimation animationWithKeyPath:@"opacity"]; theAnimation.duration=1.0; theAnimation.repeatCount=HUGE_VALF; theAnimation.autoreverses=YES; theAnimation.fromValue=[NSNumber numberWithFloat:1.0]; theAnimation.toValue=[NSNumber numberWithFloat:0.0]; [BigButton.layer addAnimation

how to animation a label on circular path in iOS?

由 筅森魡賤 提交于 2019-12-03 09:07:05
I am stuck at animating the uiLabel in my view. Actually I just want to animate my label/Text on a circular path. I have searched a lot over internet but couldn't find any good tutorial or example that is doing something like my problem. I have done CAShapeLayer (circle) increasing from 0 to its maximum value.... Similarly I want that my label/text start moving from initial point in circular path and come back to its initial point after completing one circle. Hope I have explained my problem quite precisely ... still if there is anything missing or non-understandable. please ask me. Thanks in

CABasicAnimation unlimited repeat without HUGE_VALF?

由 旧时模样 提交于 2019-12-03 08:08:33
问题 I'm trying to perform auto repeat of my image rotation animation with CABasicAnimation. I have tried to search on web how to set such property but was unable to find that. Is it really no such property for CA animation? I know that you can set some huge value (here) to repeatCount property but hey, why then does UIView animateWithDuration has an option UIViewAnimationOptionRepeat and what the value is hardcoded for it? 回答1: No, this is the way you're supposed to do it according to the
订阅 cabasicanimation