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.bounds = CGRectMake(0, 0, image.size.width, image.size.height);
syncFirst.position = CGPointMake(10, 10);
syncFirst.contents = (id)[self convertToCGImageFromNasImage:image];
[nsview.layer addSublayer:syncFirst];
}
/*To convert NSImage in CGImage*/
- (CGImageRef) convertToCGImageFromNasImage:(NSImage *) image {
NSData* cocoaData = [NSBitmapImageRep TIFFRepresentationOfImageRepsInArray: [image representations]];
CFDataRef carbonData = (__bridge CFDataRef)cocoaData;
CGImageSourceRef imageSourceRef = CGImageSourceCreateWithData(carbonData, NULL);
CGImageRef myCGImage = CGImageSourceCreateImageAtIndex(imageSourceRef, 0, NULL);
return myCGImage;
}
/*When button click animate the image*/
- (IBAction) buttonClicked:(id)sender {
CABasicAnimation* rotationAnimation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"];
rotationAnimation.toValue = [NSNumber numberWithFloat:(2 * M_PI) * 1];
rotationAnimation.duration = 1.0f;
rotationAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
[syncFirst addAnimation:rotationAnimation forKey:@"rotateAnimation"];
}
Question :
Basically I am trying to rotate this image after click a button. The code I am trying is not 100% implementation but learnt from several different places including Apple documentation. Now, it is obvious that I am doing some naive mistake but logically my code seems correct to me. It would be great if someone can point out my mistake and give me understanding about why it is not working.