Re: CALayer: Animation using actions property
Yeah I am using GC. I will test out the GCC compiler, thanks for the direction. FYI: Using an NSTimer for animation increases CPU % utilization more so than adding the animation in the layer and letting it run. From: David Duncan david.dun...@apple.commailto:david.dun...@apple.com Date: Thu, 21 Apr 2011 12:03:50 -0400 To: Arvin Bhatnagar arvin.bhatna...@one.verizon.commailto:arvin.bhatna...@one.verizon.com Cc: cocoa-dev cocoa-dev@lists.apple.commailto:cocoa-dev@lists.apple.com Subject: Re: CALayer: Animation using actions property On Apr 20, 2011, at 8:07 AM, Bhatnagar, Arvin wrote: The code below, when compiled w/ Xcode 3.2 does not display the layer…but, with Xcode 4 it works just fine? I have no idea why this is the case. I'm not certain what would cause this unfortunately. The only possibility I can think of is that you are using different compilers that are optimizing differently *and* that you are using Garbage Collection (which you allude to when you set various values to nil). But if you aren't using GC, then I have no idea (and setting the values to nil has no effect either). -- David Duncan ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: CALayer: Animation using actions property
On Apr 20, 2011, at 8:07 AM, Bhatnagar, Arvin wrote: The code below, when compiled w/ Xcode 3.2 does not display the layer…but, with Xcode 4 it works just fine? I have no idea why this is the case. I'm not certain what would cause this unfortunately. The only possibility I can think of is that you are using different compilers that are optimizing differently *and* that you are using Garbage Collection (which you allude to when you set various values to nil). But if you aren't using GC, then I have no idea (and setting the values to nil has no effect either). -- David Duncan ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: CALayer: Animation using actions property
David Thank you for the direction, I am no longer using a timer for this
Animation.
However the code below, when compiled w/ Xcode 3.2 does not display the
dot layersŠbut,
with Xcode 4 it works just fine?
I have no idea why this is the case. Is it a bug?
Not too complex:
- (void) _createDotLayer {
CGFloat radius = 2.0f;
CGFloat startTime = 0.05f * _noOfDots;
[self _removeDotLayers];
mDotLayers = [[NSMutableArray alloc] initWithCapacity:_noOfDots];
NSUInteger i, offset;
for ( i=0; i _noOfDots; i++ ) {
CALayer* dotLayer = [CALayer layer];
// Array of Constraints
offset += 10;
NSArray* dotConstraints = [NSArray arrayWithObjects:[CAConstraint
constraintWithAttribute:kCAConstraintMinX
relativeTo:@mmText
attribute:kCAConstraintMaxX
scale:1.0f
offset:offset],
[CAConstraint
constraintWithAttribute:kCAConstraintMinY
relativeTo:@mmText
attribute:kCAConstraintMinY
scale:1.0f
offset:3], nil];
// Dot Layer Properties
dotLayer.backgroundColor=
CGColorGetConstantColor(kCGColorWhite);
dotLayer.cornerRadius = radius;
dotLayer.frame =
CGRectMake(0.0f,0.0f,radius*2,radius*2);
dotLayer.constraints= dotConstraints;
dotLayer.opacity= 0.0f;
// Dot Layer Animation
CABasicAnimation* forward = [CABasicAnimation animation];
[forward setFromValue:[NSNumber numberWithFloat:0.0f]];
[forward setToValue:[NSNumber numberWithFloat:1.0f]];
[forward setKeyPath:@opacity];
[forward setAutoreverses:NO];
[forward setFillMode:kCAFillModeForwards];
[forward setBeginTime:(i * startTime)];
CABasicAnimation* backward = [CABasicAnimation animation];
[backward setFromValue:[NSNumber numberWithFloat:1.0f]];
[backward setToValue:[NSNumber numberWithFloat:0.0f]];
[backward setKeyPath:@opacity];
[backward setAutoreverses:NO];
[backward setFillMode:kCAFillModeForwards];
[backward setBeginTime:((i * startTime) * 2)];
// Dot Layer Group Animation
CAAnimationGroup* groupAnimation = [CAAnimationGroup animation];
[groupAnimation setAnimations:[NSArray arrayWithObjects:forward,
backward, nil]];
[groupAnimation setDuration:_noOfDots];
[groupAnimation setRemovedOnCompletion:NO];
[groupAnimation setAutoreverses:NO];
[groupAnimation setRepeatCount:HUGE_VALF];
[groupAnimation setFillMode:kCAFillModeBoth];
[dotLayer addAnimation:groupAnimation forKey:@dotAnimations];
// Add Dot Layer to Loading Layer
[self addSublayer:dotLayer];
[mDotLayers addObject:dotLayer];
// Garbage Collect
forward = nil;
backward= nil;
groupAnimation = nil;
dotConstraints = nil;
}
}
Thanks,
Arvin
From: David Duncan david.dun...@apple.com
Date: Tue, 19 Apr 2011 12:31:58 -0400
To: Arvin Bhatnagar arvin.bhatna...@one.verizon.com
Cc: cocoa-dev cocoa-dev@lists.apple.com
Subject: Re: CALayer: Animation using actions property
On Apr 19, 2011, at 9:26 AM, Bhatnagar, Arvin wrote:
Ok that worked if I were animating just one layer on its own. However, I
am animating three separate layers in sequence to one another. I know we
can group multiple animations for one layer (CAGroupAnimation). Other than
using a timer, is there an alternative to coordinating the animation of
different layers?
All you should need to do is add the appropriate animations to each layer.
If you need some kind of delay between them, you may find that putting
them in a group animation gives you a nested context to do so. For example
if you want an animation that progresses forward, pauses then reverses it
may make more sense to have a group animation with 2 animations on a
timeline with the included delays that repeats (but doesn't autoreverse,
since your doing the reversal yourself).
Depending on how you feel about it, it can either be a complex or fun game
to see what you can do with animations to get an effect by itself )
--
David Duncan
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Re: CALayer: Animation using actions property
I fixed my own issue. It has to do with the timer. In short when using a timer to animate a layer I was using scheduledTimerWithTimeInterval versus timerWithTimeInterval. When I use timerWithTimeInterval I then set the Fire Date and add the timer to three modes: (NSRunLoopCommonModes, NSDefaultRunLoopMode, NSEventTrackingRunLoopMode). Now when I resize my view the timer doesn't stall and the animation continues. This worked for me, and I can only assume that adding the timer to these other two modes was the solution: NSRunLoopCommonModes / NSEventTrackingRunLoopMode. If anybody can explain this further, I am all ears! Thanks, Arvin On 4/18/11 10:49 PM, Bhatnagar, Arvin arvin.bhatna...@verizon.com wrote: Hi All, This is probably a simple question for someone other than I. I have a very simple CALayer which is a simple plain layer with a white background. I then create a CABasicAnimation and add it to the actions property to animate the @opacity. From here I setup a timer to fire and toggle the opacity between 0 and 1 which animates. My issue is, when I go to resize the window the animation halts. Anybody know why this occurs and if I can allow the animation to continue even if I resize the view that the layer resides in? It's probably something small and simple, but just don't know what it is and can't find it in the documentation. Oh yeah, my later tree is setup as such: [CALayer rootLayer] [view setWantsLayers:YES] [[view layer] addSublayer:mBasicLayer] Thanks, Arvin ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/arvin.bhatnagar%40verizon .com This email sent to arvin.bhatna...@verizon.com ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: CALayer: Animation using actions property
On Apr 18, 2011, at 7:49 PM, Bhatnagar, Arvin wrote: This is probably a simple question for someone other than I. I have a very simple CALayer which is a simple plain layer with a white background. I then create a CABasicAnimation and add it to the actions property to animate the @opacity. From here I setup a timer to fire and toggle the opacity between 0 and 1 which animates. Your analysis of the timer was correct, but I wanted to talk to this point instead – rather than using a timer to toggle the opacity, you could just add an animation to the layer that auto-reverses and repeats indefinitely, which would likely give you the same effect without having to run a timer at all. -- David Duncan ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: CALayer: Animation using actions property
Thanks David, I am going to try that suggestion right now. On 4/19/11 11:59 AM, David Duncan david.dun...@apple.com wrote: On Apr 18, 2011, at 7:49 PM, Bhatnagar, Arvin wrote: This is probably a simple question for someone other than I. I have a very simple CALayer which is a simple plain layer with a white background. I then create a CABasicAnimation and add it to the actions property to animate the @opacity. From here I setup a timer to fire and toggle the opacity between 0 and 1 which animates. Your analysis of the timer was correct, but I wanted to talk to this point instead rather than using a timer to toggle the opacity, you could just add an animation to the layer that auto-reverses and repeats indefinitely, which would likely give you the same effect without having to run a timer at all. -- David Duncan ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: CALayer: Animation using actions property
Ok that worked if I were animating just one layer on its own. However, I am
animating three separate layers in sequence to one another. I know we can group
multiple animations for one layer (CAGroupAnimation). Other than using a timer,
is there an alternative to coordinating the animation of different layers?
Some Code:
- (void) moveDots {
// Animate Dot Opacity
CALayer* dot = (CALayer *)[mDotLayers objectAtIndex:mDotPosition];
dot.opacity = mDotDirection ? 0.0f : 1.0f;
[self setNeedsDisplay];
// NO -- Forward, YES -- Backward
if ( !mDotDirection ) mDotPosition++;
if ( mDotDirection ) mDotPosition--;
if ( mDotPosition 0 ) {
mDotPosition = 0;
mDotDirection = NO;
}
if ( mDotPosition (_noOfDots-1) ) {
mDotPosition = (_noOfDots-1);
mDotDirection = YES;
}
}
- (void) _startAnimationTimer {
// Just in case
[self _stopAnimationTimer];
// Dot Layer Timer
mDotTimer = [NSTimer timerWithTimeInterval:(NSTimeInterval)1.0f
target:self
selector:@selector(moveDots)
userInfo:nil
repeats:YES];
[mDotTimer setFireDate:[NSDate date]];
[[NSRunLoop currentRunLoop] addTimer:mDotTimer
forMode:NSRunLoopCommonModes];
[[NSRunLoop currentRunLoop] addTimer:mDotTimer
forMode:NSDefaultRunLoopMode];
[[NSRunLoop currentRunLoop] addTimer:mDotTimer
forMode:NSEventTrackingRunLoopMode];
}
Thanks,
Arvin
On 4/19/11 12:07 PM, Bhatnagar, Arvin
arvin.bhatna...@verizon.commailto:arvin.bhatna...@verizon.com wrote:
Thanks David, I am going to try that suggestion right now.
On 4/19/11 11:59 AM, David Duncan
david.dun...@apple.commailto:david.dun...@apple.com wrote:
On Apr 18, 2011, at 7:49 PM, Bhatnagar, Arvin wrote:
This is probably a simple question for someone other than I.
I have a very simple CALayer which is a simple plain layer with a white
background. I then create a CABasicAnimation and add it to the actions
property to animate the @opacity. From here I setup a timer to fire
and toggle the opacity between 0 and 1 which animates.
Your analysis of the timer was correct, but I wanted to talk to this
point instead rather than using a timer to toggle the opacity, you
could just add an animation to the layer that auto-reverses and repeats
indefinitely, which would likely give you the same effect without having
to run a timer at all.
--
David Duncan
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Re: CALayer: Animation using actions property
On Apr 19, 2011, at 9:26 AM, Bhatnagar, Arvin wrote: Ok that worked if I were animating just one layer on its own. However, I am animating three separate layers in sequence to one another. I know we can group multiple animations for one layer (CAGroupAnimation). Other than using a timer, is there an alternative to coordinating the animation of different layers? All you should need to do is add the appropriate animations to each layer. If you need some kind of delay between them, you may find that putting them in a group animation gives you a nested context to do so. For example if you want an animation that progresses forward, pauses then reverses it may make more sense to have a group animation with 2 animations on a timeline with the included delays that repeats (but doesn't autoreverse, since your doing the reversal yourself). Depending on how you feel about it, it can either be a complex or fun game to see what you can do with animations to get an effect by itself ) -- David Duncan ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
