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【ObjC】放大一个uiimageview

作者:昶福 / 发布于2014/11/7/ 513


	#define CONST_animation_time 0.5
	#define CONST_enlarge_proportion 15.0
	
	
	
	CGPoint UpPointOfView(UIView *view)
	{
	return (CGPoint){view.center.x, 200+2+55/2};
	};
	
	
	
	- (void) circleAnimate:(UIImageView*)view
	{
	CGContextRef context = UIGraphicsGetCurrentContext();
	[UIView beginAnimations:nil context:context];
	[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
	[UIView setAnimationDuration:CONST_animation_time];
	[view setCenter:UpPointOfView(view)];
	
	
	CABasicAnimation *scalingAnimation = (CABasicAnimation *)[view.layer animationForKey:@"scaling"];
	
	if (!scalingAnimation)
	{
	 scalingAnimation = [CABasicAnimation animationWithKeyPath:@"transform"];
	 scalingAnimation.repeatCount=1;
	 scalingAnimation.duration=CONST_animation_time;
	 scalingAnimation.autoreverses=NO;
	 scalingAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut];
	 scalingAnimation.fromValue=[NSValue valueWithCATransform3D:CATransform3DMakeScale(1.0, 1.0, 1.0)];
	 scalingAnimation.toValue=[NSValue valueWithCATransform3D:CATransform3DMakeScale(CONST_enlarge_proportion, CONST_enlarge_proportion, 1.0)];
	}
	
	[view.layer addAnimation:scalingAnimation forKey:@"scaling"];
	view.layer.transform = CATransform3DMakeScale(CONST_enlarge_proportion, CONST_enlarge_proportion, 1.0);
	[UIView commitAnimations];
	}

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