使用CAlayer实现动画效果

定义控件

1.定义一个视图用来显示动画(aView)

  self.aView = [[UIView alloc]initWithFrame:CGRectMake(100, 100, 175, 175)];_aView.backgroundColor = [UIColor orangeColor];[self.view addSubview:_aView];

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//设置阴影颜色    _aView.layer.shadowColor = [UIColor darkGrayColor].CGColor;//设置阴影偏移量    _aView.layer.shadowOffset = CGSizeMake(-10, -10);//设置阴影透明图，默认值0    _aView.layer.shadowOpacity = 1.0;//设置阴影圆角，默认值3    _aView.layer.shadowRadius = 7.0;//设置阴影边框颜色和宽度    _aView.layer.borderColor = [UIColor yellowColor].CGColor;    _aView.layer.borderWidth = 13.0;//设置阴影的锚点,默认为中心点（0.5，0.5）    _aView.layer.anchorPoint = CGPointMake(0, 0);    NSLog(@"anchor point = %@",NSStringFromCGPoint(_aView.layer.anchorPoint));//设置位置，position是锚点基于父视图原点的位置    _aView.layer.position = CGPointMake(0, 0);    NSLog(@"Position = %@“,NSStringFromCGPoint(_aView.layer.position));

2.自定义Button初始化方法

-(UIButton *)buttonWithCGRect:(CGRect)aRect title:(NSString *)title backgroundColor:(UIColor *)aColor target:(id)aTarget action:(SEL)aSel{    UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];    [button setFrame:aRect];    [button setTitle:title forState:UIControlStateNormal];    [button setBackgroundColor:aColor];    [button addTarget:aTarget action:aSel forControlEvents:UIControlEventTouchUpInside];    return button;}

3.使用自定义初始化方法定义Button

//定义一个按钮basicButton功能方法(doBasicAnimation:)    UIButton *basicButton =  [self buttonWithCGRect:CGRectMake(100, 450, 175, 30) title:@"BasicAnimation" backgroundColor:[UIColor magentaColor] target:self action:@selector(doBasicAnimation:)];    [self.view addSubview:basicButton];//定义一个按钮keyFrameButton功能方法(doKeyFrameAnimation:)    UIButton *keyFrameButton =  [self buttonWithCGRect:CGRectMake(100, 500, 175, 30) title:@"KeyFrameAnimation" backgroundColor:[UIColor magentaColor] target:self action:@selector(doKeyFrameAnimation:)];    [self.view addSubview:keyFrameButton];//定义一个按钮transitionButton功能方法(doTransitionAnimation:)    UIButton *transitionButton =  [self buttonWithCGRect:CGRectMake(100, 550, 175, 30) title:@"TransitionAnimation" backgroundColor:[UIColor magentaColor] target:self action:@selector(doTransitionAnimation:)];    [self.view addSubview:transitionButton];//定义一个按钮transfromButton功能方法(doTransfromAnimation:)    UIButton *transfromButton =  [self buttonWithCGRect:CGRectMake(100, 600, 175, 30) title:@"TransfromButton" backgroundColor:[UIColor magentaColor] target:self action:@selector(doTransfromAnimation:)];    [self.view addSubview:transfromButton];    }

功能实现

1.使用BasicAnimation:类的属性实现动画效果

-(void)doBasicAnimation:(UIButton *)button{

//使用position属性实现移动效果
//kayPath就是CAlayer中可以做动画的属性

CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"position.x"];animation.fromValue = [NSValue valueWithCGPoint:CGPointMake(100, 100)];animation.toValue = [NSValue valueWithCGPoint:CGPointMake(300, 300)];animation.fromValue = [NSNumber numberWithInt:175/2];animation.toValue = [NSNumber numberWithInt:375-175/2];animation.duration = 5.0;

[_aView.layer addAnimation:animation forKey:nil];

//使用backgroundColor属性实现实现颜色渐变效果

CABasicAnimation *animation1 = [CABasicAnimation animationWithKeyPath:@"backgroundColor"];    animation1.fromValue = (id) [[UIColor redColor] CGColor];    animation1.toValue = (id) [[UIColor greenColor]CGColor];    animation1.duration = 3.0;

2.使用CAAnimationGroup:类的实现组合动画效果

CAAnimationGroup *animationGroup = [CAAnimationGroup animation];    NSArray *array = [NSArray arrayWithObjects:animation,animation1, nil];animationGroup.animations = array;animationGroup.duration = 5.0;[_aView.layer addAnimation:animationGroup forKey:nil];}

3.使用CAkeyfromeAnimation:类实现关键帧动画效果

-(void)doKeyFrameAnimation:(UIButton *)button{CAKeyframeAnimation *animation = [CAKeyframeAnimation animationWithKeyPath:@"position"];

//设置每一帧的值

    animation.values = [NSArray arrayWithObjects:            [NSValue valueWithCGPoint:CGPointMake(100, 100)],            [NSValue valueWithCGPoint:CGPointMake(200, 150)],            [NSValue valueWithCGPoint:CGPointMake(140, 210)],            [NSValue valueWithCGPoint:CGPointMake(300, 400)],            [NSValue valueWithCGPoint:CGPointMake(120, 60)],            [NSValue valueWithCGPoint:CGPointMake(150, 200)],nil];

//设置每一帧动画结束的时候占用时长百分比

    animation.keyTimes  = [NSArray arrayWithObjects:                           [NSNumber numberWithFloat:0.1],                           [NSNumber numberWithFloat:0.2],                           [NSNumber numberWithFloat:0.6],                           [NSNumber numberWithFloat:0.8],                           [NSNumber numberWithFloat:0.9],                           [NSNumber numberWithFloat:1.0],nil];    animation.duration = 10.0;    [_aView.layer addAnimation:animation forKey:nil];

//利用关键帧动画实现一个晃动效果

    CAKeyframeAnimation *animation1 = [CAKeyframeAnimation animationWithKeyPath:@"position"];    animation1.values = [NSArray arrayWithObjects:             [NSValue valueWithCGPoint:CGPointMake(_aView.center.x -5, _aView.center.y)],             [NSValue valueWithCGPoint:CGPointMake(_aView.center.x , _aView.center.y)],             [NSValue valueWithCGPoint:CGPointMake(_aView.center.x +5, _aView.center.y)],             [NSValue valueWithCGPoint:CGPointMake(_aView.center.x , _aView.center.y)],             [NSValue valueWithCGPoint:CGPointMake(_aView.center.x -5, _aView.center.y)],             [NSValue valueWithCGPoint:CGPointMake(_aView.center.x , _aView.center.y)],             [NSValue valueWithCGPoint:CGPointMake(_aView.center.x +5, _aView.center.y)],             [NSValue valueWithCGPoint:CGPointMake(_aView.center.x , _aView.center.y)],nil];

---

[_aView.layer addAnimation:animation1 forKey:nil];   }

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-(void)doTransitionAnimation:(UIButton *)button{CATransition *transition = [CATransition animation];transition.type = kCATransitionReveal;transition.subtype = kCATransitionFromTop;

4.设置给动画设置代理

transition.delegate = self;    [_aView.layer addAnimation:transition forKey:nil];}

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-(void)animationDidStart:(CAAnimation *)anim{NSLog(@"animationDidStart");}-(void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag{NSLog(@"animationDidStop");}

4.2D仿射变换的演算推导

-(void)doTransfromAnimation:(UIButton *)button{

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x’ = ax + cy + tx
y’ = bx + dy + ty

[ sx 0 0 sy 0 0 ]

” ” ” sx 0 0 0 sy 0 0 0 1

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//缩放效果    _aView.transform = CGAffineTransformMakeScale(1.2, 1.2);//旋转效果    _aView.transform = CGAffineTransformMakeRotation(M_PI / 4);    [UIView beginAnimations:nil context:nil];    [UIView setAnimationDuration:1.0];    _aView.transform = CGAffineTransformRotate(_aView.transform, M_PI / 4);    [UIView commitAnimations];    }