CAAnimation用法

【1】缩放效果

    CABasicAnimation *scaleAnimation = [CABasicAnimationanimationWithKeyPath:@"transform.scale"];

    scaleAnimation.fromValue = [NSNumbernumberWithFloat:0.0];

    scaleAnimation.toValue = [NSNumbernumberWithFloat:1.0];

    scaleAnimation.duration =0.2f;

    scaleAnimation.timingFunction = [CAMediaTimingFunctionfunctionWithName:kCAMediaTimingFunctionEaseInEaseOut];

【2】透明度变化

    CABasicAnimation *opacityAnimation = [CABasicAnimationanimationWithKeyPath:@"opacity"];

    opacityAnimation.fromValue = [NSNumbernumberWithFloat:1.0];

    opacityAnimation.toValue = [NSNumbernumberWithFloat:0.0];

    opacityAnimation.duration =0.2;

    opacityAnimation.beginTime =0.2;//延迟开始

【3】移动效果

    CABasicAnimation *moveAnimation = [CABasicAnimation animationWithKeyPath:@"position"];

    moveAnimation.fromValue = [NSValue valueWithCGPoint:groupLayer.position];

    moveAnimation.toValue = [NSValue valueWithCGPoint:CGPointMake(320 - 80, groupLayer.position.y)];

    moveAnimation.autoreverses = YES;

    moveAnimation.repeatCount = MAXFLOAT;

    moveAnimation.duration = 2;

【4】旋转效果

    CABasicAnimation *rotateAnimation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.x"];

    rotateAnimation.fromValue = [NSNumber numberWithFloat:0.0];

    rotateAnimation.toValue = [NSNumber numberWithFloat:6.0 * M_PI];

    rotateAnimation.autoreverses = YES;

    rotateAnimation.repeatCount = MAXFLOAT;

    rotateAnimation.duration = 2;

【5】多个动画叠加

    CAAnimationGroup *animationGroup = [CAAnimationGroupanimation];

    animationGroup.duration =0.35;

    animationGroup.autoreverses =NO;   //是否重播，原动画的倒播

    animationGroup.repeatCount =1;//NSNotFound;//HUGE_VALF;     //HUGE_VALF,源自math.h

    animationGroup.delegate =self;

    [animationGroup setAnimations:[NSArrayarrayWithObjects:scaleAnimation,opacityAnimation,nil]];