晃动提醒

来源：互联网发布：哪些软件看电影免费编辑：程序博客网时间：2024/04/28 02:16

#import <QuartzCore/QuartzCore.h>

@interface CAKeyframeAnimation (shakeAnimation)

+ (CAKeyframeAnimation *)shakeAnimation:(CGRect)frame;

@end

#import "CAKeyframeAnimation+shakeAnimation.h"

@implementation CAKeyframeAnimation (shakeAnimation)

static int numberOfShakes =8;//震动次数

static float durationOfShake =0.5f;//震动时间

static float vigourOfShake =0.02f;//震动幅度

+ (CAKeyframeAnimation *)shakeAnimation:(CGRect)frame

{

CAKeyframeAnimation *shakeAnimation = [CAKeyframeAnimationanimationWithKeyPath:@"position"];

CGMutablePathRef shakePath =CGPathCreateMutable();

CGPathMoveToPoint(shakePath,NULL,CGRectGetMidX(frame),CGRectGetMidY(frame) );

for (int index =0; index <numberOfShakes; ++index)

{

CGPathAddLineToPoint(shakePath,NULL,CGRectGetMidX(frame) - frame.size.width *vigourOfShake,CGRectGetMidY(frame));

CGPathAddLineToPoint(shakePath,NULL, CGRectGetMidX(frame) + frame.size.width *vigourOfShake,CGRectGetMidY(frame));

}

CGPathCloseSubpath(shakePath);

shakeAnimation.path = shakePath;

shakeAnimation.duration = durationOfShake;

CFRelease(shakePath);

return shakeAnimation;

}

@end