I have an application which displays the artwork from a chosen song selected from the iPod library and would like to make it spin constantly.
The code so far is as follows:
-(void)chosen:(MPMediaItem*)song withObject:(id)obj
{
AppDelegate* app = (AppDelegate*)[[UIApplication sharedApplication] delegate];
//ARTWORK STUFF
UIImage *artworkImage = [UIImage imageNamed:#"noArtworkImage.png"]
MPMediaItemArtwork *artwork = [song valueForProperty: MPMediaItemPropertyArtwork];
if (artwork)
{
artworkImage = [artwork imageWithSize: CGSizeMake (200, 200) ];
}
[app.viewController.artworkImage1 setImage:artworkImage];
}
Use Quartz Core Framework. This is untested but I imagine it should work in theory.
#import <QuartzCore/QuartzCore.h>
CABasicAnimation *fullRotation = [CABasicAnimation animationWithKeyPath:#"transform.rotation"];
fullRotation.fromValue = [NSNumber numberWithFloat:0];
fullRotation.toValue = [NSNumber numberWithFloat:((360*M_PI)/180)];
fullRotation.duration = 6;
fullRotation.repeatCount = 1e100f;
[app.viewController.artworkImage1.layer addAnimation:fullRotation forKey:#"360"];
Related
I am working on a project in which A video is recorded.When recording is finished, I play video using AVPlayer adding layer to view. Now I want a gif image as adding layer to that view.
I successfully Add gif image as layer, but image is not animated. It is like a static image.I use Library for GIF image.
My code is below
self.avPlayer = [AVPlayer playerWithURL:self.urlstring];
self.avPlayer.actionAtItemEnd = AVPlayerActionAtItemEndNone;
AVPlayerLayer *videoLayer = [AVPlayerLayer playerLayerWithPlayer:self.avPlayer];
videoLayer.frame = self.preview_view.bounds;
videoLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;
[self.preview_view.layer addSublayer:videoLayer];
NSURL *url = [[NSBundle mainBundle] URLForResource:#"02" withExtension:#"gif"];
CALayer *layer = [[CALayer alloc]init];
layer.frame = self.img_gif.bounds;
layer.contents = (id) [UIImage animatedImageWithAnimatedGIFData:[NSData dataWithContentsOfURL:url]].CGImage;
[self.preview_view.layer addSublayer:layer];
Please help me with it
Thank you
I have successfully done it. I added my GIF image to layer.
- (CAKeyframeAnimation *)createGIFAnimation:(NSData *)data{
CGImageSourceRef src = CGImageSourceCreateWithData((__bridge CFDataRef)(data), nil);
int frameCount =(int) CGImageSourceGetCount(src);
// Total loop time
float time = 0;
// Arrays
NSMutableArray *framesArray = [NSMutableArray array];
NSMutableArray *tempTimesArray = [NSMutableArray array];
// Loop
for (int i = 0; i < frameCount; i++){
// Frame default duration
float frameDuration = 0.1f;
// Frame duration
CFDictionaryRef cfFrameProperties = CGImageSourceCopyPropertiesAtIndex(src,i,nil);
NSDictionary *frameProperties = (__bridge NSDictionary*)cfFrameProperties;
NSDictionary *gifProperties = frameProperties[(NSString*)kCGImagePropertyGIFDictionary];
// Use kCGImagePropertyGIFUnclampedDelayTime or kCGImagePropertyGIFDelayTime
NSNumber *delayTimeUnclampedProp = gifProperties[(NSString*)kCGImagePropertyGIFUnclampedDelayTime];
if(delayTimeUnclampedProp) {
frameDuration = [delayTimeUnclampedProp floatValue];
} else {
NSNumber *delayTimeProp = gifProperties[(NSString*)kCGImagePropertyGIFDelayTime];
if(delayTimeProp) {
frameDuration = [delayTimeProp floatValue];
}
}
// Make sure its not too small
if (frameDuration < 0.011f){
frameDuration = 0.100f;
}
[tempTimesArray addObject:[NSNumber numberWithFloat:frameDuration]];
// Release
CFRelease(cfFrameProperties);
// Add frame to array of frames
CGImageRef frame = CGImageSourceCreateImageAtIndex(src, i, nil);
[framesArray addObject:(__bridge id)(frame)];
// Compile total loop time
time = time + frameDuration;
}
NSMutableArray *timesArray = [NSMutableArray array];
float base = 0;
for (NSNumber* duration in tempTimesArray){
//duration = [NSNumber numberWithFloat:(duration.floatValue/time) + base];
base = base + (duration.floatValue/time);
[timesArray addObject:[NSNumber numberWithFloat:base]];
}
// Create animation
CAKeyframeAnimation* animation = [CAKeyframeAnimation animationWithKeyPath:#"contents"];
animation.duration = time;
animation.repeatCount = HUGE_VALF;
animation.removedOnCompletion = NO;
animation.fillMode = kCAFillModeForwards;
animation.values = framesArray;
animation.keyTimes = timesArray;
animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];
animation.calculationMode = kCAAnimationDiscrete;
return animation;
}
To add image in layer of view write below code
CALayer *layer = [CALayer layer];
layer.frame = self.preview_view.bounds;
CAKeyframeAnimation *animation = [self createGIFAnimation:[NSData dataWithContentsOfURL:url]];
[layer addAnimation:animation forKey:#"contents"];
["YOUR VIEW".layer addSublayer:layer];
Try this with your image view.
CALayer *layer = [CALayer layer];
layer.backgroundColor = [[UIColor whiteColor] CGColor];
layer.contents = (id) [UIImage animatedImageWithAnimatedGIFData:[NSData dataWithContentsOfURL:url]].CGImage;
NSURL *url = [[NSBundle mainBundle] URLForResource:#"02" withExtension:#"gif"];
[[self.view layer] addSublayer:layer];
[layer setNeedsDisplay];
[self.view addSubview: animateImageView];
I have a UITableView with a white background, I would like to apply a linear gradient across the tableview cells so that the gradient is one single gradient from the start to end of the tableview see an example below from Adobe Illustrator. Is there a way this can be achieved using Core Graphics?
I actually managed to figure it out, to some extent from this question and help from matt
- (NSArray *)generateCellGradients
{
NSMutableArray *gradientColors = [[NSMutableArray alloc] init];
NSUInteger numberOfIntervals = self.datasource.count;
CGFloat startColorR = 81.0 / 255.0;
CGFloat startColorG = 118.0 / 255.0;
CGFloat startColorB = 214.0 / 255.0;
UIColor *startColor = [UIColor colorWithRed:startColorR
green:startColorG
blue:startColorB
alpha:1.0];
[gradientColors addObject:startColor];
CGFloat endColorR = 0;
CGFloat endColorG = 191.0 / 255.0;
CGFloat endColorB = 120.0 / 255.0;
UIColor *endColor = [UIColor colorWithRed:endColorR
green:endColorG
blue:endColorB
alpha:1.0];
CGFloat intervalR = (endColorR - startColorR) / numberOfIntervals;
CGFloat intervalG = (endColorG - startColorG) / numberOfIntervals;
CGFloat intervalB = (endColorB - startColorB) / numberOfIntervals;
for (NSUInteger i = 0; i < numberOfIntervals; i++) {
startColorR += intervalR;
startColorG += intervalG;
startColorB += intervalB;
UIColor *intervalColor = [UIColor colorWithRed:startColorR green:startColorG blue:startColorB alpha:1.0];
[gradientColors addObject:intervalColor];
}
[gradientColors addObject:endColor];
NSMutableArray *cellGradients = [[NSMutableArray alloc] init];
for (NSUInteger i = 0; i < gradientColors.count; i++) {
UIColor *startGradientColor = gradientColors[i];
UIColor *endGradientColor;
if (i == gradientColors.count - 1) {
endGradientColor = gradientColors[i];
} else {
endGradientColor = gradientColors[i + 1];
}
NSArray *colors = #[(id)startGradientColor.CGColor, (id)endGradientColor.CGColor];
CAGradientLayer *gradientLayer = [CAGradientLayer layer];
gradientLayer.colors = colors;
[cellGradients addObject:gradientLayer];
}
return cellGradients;
}
This is how to add it to a subview:
CAGradientLayer *backgroundLayer = self.gradients[indexPath.row];
backgroundLayer.frame = view.bounds;
[view.layer insertSublayer:backgroundLayer atIndex:0];
Here is the result below:
Find below the code to create gradient layer by provide two required colours. You can add this layer to any view. Add this framework #import <QuartzCore/QuartzCore.h> in order to achieve this result.
typedef enum {
GradientType_Linear,
GradientType_Reflected,
}GradientType;
+(CAGradientLayer*) gradientLayerFromColor:(UIColor *)firstColor
secondColor:(UIColor *)secondColor
gradientType:(GradientType)gradientType
{
UIColor *colorStart = firstColor;
UIColor *colorEnd = secondColor;
NSArray *colors;
NSArray *locations;
switch (gradientType) {
case GradientType_Linear:
{
colors = [NSArray arrayWithObjects:(id)colorStart.CGColor, colorEnd.CGColor, nil];
NSNumber *start1 = [NSNumber numberWithFloat:0.0];
NSNumber *stop1 = [NSNumber numberWithFloat:1.0];
locations = [NSArray arrayWithObjects:start1, stop1, nil];
}
break;
case GradientType_Reflected:
{
colors = [NSArray arrayWithObjects:(id)colorStart.CGColor, colorEnd.CGColor, colorEnd.CGColor, colorStart.CGColor, nil];
NSNumber *start1 = [NSNumber numberWithFloat:0.0];
NSNumber *stop1 = [NSNumber numberWithFloat:0.5];
NSNumber *start2 = [NSNumber numberWithFloat:0.5];
NSNumber *stop2 = [NSNumber numberWithFloat:1.0];
locations = [NSArray arrayWithObjects:start1, stop1, start2, stop2, nil];
}
break;
default:
{
colors = [NSArray arrayWithObjects:(id)colorStart.CGColor, colorEnd.CGColor, nil];
NSNumber *start1 = [NSNumber numberWithFloat:0.0];
NSNumber *stop1 = [NSNumber numberWithFloat:1.0];
locations = [NSArray arrayWithObjects:start1, stop1, nil];
}
break;
}
CAGradientLayer *gradientLayer = [CAGradientLayer layer];
gradientLayer.colors = colors;
gradientLayer.locations = locations;
return gradientLayer;
}
I have a method which translates a view and optionally scales it while translating. I am using animation groups and adding the required animations as needed. Here are the animation cases working perfectly.
Translation (x or y axis or both) (OK)
Scaling (OK)
Translation while scaling (MOSTLY)
However, doing a translation while scaling works only when the starting scalefactor is 1. When the view is already scaled, I notice most of the transition jumping instead of animating, although the end result of scaling and translation is correct.
I am posting part of the code for clarification. The problem occurs only when previousZoomScale is not 1! I appreciate any directions you can point me to.
-(void)performAnimationForView: (AnimationType)animationType
WithDX: (CGFloat)dx
AndDY: (CGFloat)dy
Scale: (CGFloat)scale
Duration: (CGFloat)duration
{
CABasicAnimation *translateXAnimation = nil, *translateYAnimation = nil, *scaleAnimation = nil;
NSString* animationGroupName;
CGPoint newDxDy;
switch (animationType)
{
case kAnimationTranslateAndScale:
// set animation key
animationGroupName = #"translatescale";
translateXAnimation = [CABasicAnimation animationWithKeyPath:#"transform.translation.x"];
translateXAnimation.repeatCount = 0;
translateXAnimation.autoreverses = NO;
translateXAnimation.removedOnCompletion = NO;
translateXAnimation.fillMode = kCAFillModeForwards;
translateXAnimation.fromValue = [NSNumber numberWithFloat: self.previousDxDy.x]; // previous point we're tranlsating from
translateXAnimation.toValue = [NSNumber numberWithFloat:dx]; // destination point
translateYAnimation = [CABasicAnimation animationWithKeyPath:#"transform.translation.y"];
translateYAnimation.repeatCount = 0;
translateYAnimation.autoreverses = NO;
translateYAnimation.removedOnCompletion = NO;
translateYAnimation.fillMode = kCAFillModeForwards;
translateYAnimation.fromValue = [NSNumber numberWithFloat: self.previousDxDy.y];
translateYAnimation.toValue = [NSNumber numberWithFloat:dy];
newDxDy = CGPointMake(dx, dy);
self.previousDxDy = newDxDy;
// scaling animation
scaleAnimation = [CABasicAnimation animationWithKeyPath:#"transform.scale"];
scaleAnimation.autoreverses = NO;
scaleAnimation.repeatCount = 0;
scaleAnimation.removedOnCompletion = NO;
scaleAnimation.fillMode = kCAFillModeForwards;
scaleAnimation.fromValue = [NSNumber numberWithDouble: self.previousZoomScale]; // initial zoom scale
scaleAnimation.toValue = [NSNumber numberWithDouble:scale]; // target scale
self.previousZoomScale = scale;
break;
}
NSMutableArray* animationArray = [[NSMutableArray alloc] initWithObjects: nil];
if (translateXAnimation != nil)
[animationArray addObject: translateXAnimation];
if (translateYAnimation != nil)
[animationArray addObject: translateYAnimation];
if (scaleAnimation != nil)
[animationArray addObject: scaleAnimation];
CAAnimationGroup *theGroup = [CAAnimationGroup animation];
theGroup.duration = duration;
theGroup.removedOnCompletion = NO;
theGroup.fillMode = kCAFillModeForwards;
theGroup.repeatCount = 0;
theGroup.timingFunction = [CAMediaTimingFunction functionWithName: kCAMediaTimingFunctionLinear];
theGroup.animations = animationArray;
theGroup.delegate = self;
[theGroup setValue: animationGroupName forKey: #"animationtype"];
[self.backgroundImageView.layer addAnimation: theGroup forKey: animationGroupName];
}
I am trying to animate several views (layers) using CAKeyframeAnimation and CAAnimationGroup. Each view to be animated is contained in an array. My idea is to loop through the array where CAKeyframeAnimation instance of each view would be added to an array of animations, which then would be added to the CAAnimationGroup. My goal is to animate each view one after another. As far as I understand I need to use the group in order to have a reference for the beginTime.
I am probably missing something obvious, but my code doesn't work
CAAnimationGroup *cardAnimationGroup = [CAAnimationGroup animation];
cardAnimationGroup.delegate = self;
cardAnimationGroup.removedOnCompletion = NO;
cardAnimationGroup.beginTime = 0.0f;
[cardAnimationGroup setValue:#"animation0" forKey:#"id"];
cardAnimationGroup.duration = 1.2f * [_myViewsArray count];
NSMutableArray *animationsArray = [[NSMutableArray alloc] init];
// Loop through views
for (UIView *cardView in _myViewsArray)
{
NSUInteger index = [_myViewsArray indexOfObject:cardView];
// my target origin
CGFloat yOffset = (-(cardView.frame.origin.y - _middleCardView.frame.origin.y) - index * 2);
CAKeyframeAnimation *translateCardPositionAnimation = [CAKeyframeAnimation animationWithKeyPath:#"transform.translation.y"];
translateCardPositionAnimation.removedOnCompletion = YES;
//translateCardPositionAnimation.fillMode = kCAFillModeForwards;
translateCardPositionAnimation.beginTime = 1.2f * index;
translateCardPositionAnimation.duration = 1.2f;
translateCardPositionAnimation.values = [NSArray arrayWithObjects:
[NSNumber numberWithFloat:0.0f],
[NSNumber numberWithFloat:yOffset],
[NSNumber numberWithFloat:yOffset],nil];
translateCardPositionAnimation.keyTimes = [NSArray arrayWithObjects:
[NSNumber numberWithFloat:0.0f],
[NSNumber numberWithFloat:1.0f],
[NSNumber numberWithFloat:1.2f], nil];
[_containerCardView addSubview:cardView];
[_containerCardView sendSubviewToBack:cardView];
[animationsArray addObject:translateCardPositionAnimation];
[cardView.layer addObject:translateCardPositionAnimation forKey:#"id"];
if (index == [_myViewsArray count]-1) {
[cardAnimationGroup setAnimations:animationsArray];
}
}
I am just about done with my App and have added some great things with core plot and the help of their dedicated staff. My question pertains to using images with the retina display. I have an annotation that is a picture of a speech bubble. When I run the App in the simulator, it displays fine for regular resolution, but when I switch to retina, the image is cropped. See pictures below. I have a .png that I called Bubble, and I added another that is called Bubble#2x, which is twice the size, I thought this was what I needed to do. That did not work. So I have tried to set the view.contentScale, see below code. But nothing seems to work. Anyone have any ideas what I am forgetting to do? Thanks once again.
{
//first annotation
NSValue *value = [self.myData objectAtIndex:index];
CGPoint point = [value CGPointValue];
NSString *number1 = [NSString stringWithFormat:#"(%.2f, ", point.x];
NSString *number2 = [NSString stringWithFormat:#"%.2f)", point.y];
NSNumber *x = [NSNumber numberWithFloat:point.x];
NSNumber *y = [NSNumber numberWithFloat:point.y];
NSArray *anchorPoint = [NSArray arrayWithObjects: x, y, nil];
NSString *final = [number1 stringByAppendingString:number2];
//second annotation
UIImage *bubble = [UIImage imageNamed:#"Bubble.png"];
CPTImage *fillimage = [CPTImage imageWithCGImage:bubble.CGImage];
CPTBorderedLayer *imageLayer = [[CPTBorderedLayer alloc] init];
//imageLayer.contentsScale = [[UIScreen mainScreen] scale]; //tried this
imageLayer.frame = CGRectMake(0, 0, 150, 80);
//imageLayer.contentsScale = 2.0f; //and this
imageLayer.fill = [CPTFill fillWithImage:fillimage];
CPTTextLayer *textLayer = [[CPTTextLayer alloc] initWithText:final style:annotationTextStyle];
_annotation = [[CPTPlotSpaceAnnotation alloc] initWithPlotSpace:graph.defaultPlotSpace anchorPlotPoint:anchorPoint];
_annotation.contentLayer = textLayer;
_annotation.displacement = CGPointMake(90.0f, 5.0f);
_annotation.rotation = M_PI * .03f;
_picAnnotation = [[CPTPlotSpaceAnnotation alloc] initWithPlotSpace:graph.defaultPlotSpace anchorPlotPoint:anchorPoint];
_picAnnotation.contentLayer = imageLayer;
_picAnnotation.displacement = CGPointMake(75.0f, 5.0f);
}
after that code, I then placed both of the annotations. As you can see one works, the other doesn't.
You should pass the image scale when creating a CPTImage if you need to support Retina images.
CPTImage *fillimage = [CPTImage imageWithCGImage:bubble.CGImage
scale:bubble.scale];