Objective-c动画

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https://www.baiydu.com

想提高下以后做的应用给客户带去的体验，所以看了几天OC的CAAnimation动画类，也做了几个小案例，下面讲个别案例来做为本文的主要内容。

一:继承结构截图

上面截图中用得最多的类大概就是，CABaseAnimation和 CAKeyframeAnimation，这两个类的最大区别就是对动画的控制，CABaseAnimation 不能在类中增加和控制帧，CAKeyframeAnimation这个类可以在代码中增加和控制帧动画和每帧运行的时间， CAAnimation是所有类的基类，所以它能实现所有类能实现的功能，我做的案例中也用到了这个类， CAAnimationGroup是组动画，可以将其他5动画类的动画，放入它的属性数组，然后增加到动画目标视图的Layer中去，同时实现多个动画效果。

二:案例

我这里一共贴两个动画的案例，第一个是CAAniamtion的，第二个是CAAnimationGroup组动画，它里面就包含了

CABaseAnimation和CAKeyframeAnimation

CAAniamtion动画是为抽奖转盘写的，中奖后从底部弹出提示中奖动画视图，最后一帧动画主要实现对弹出视图的隐藏，X坐标=设备宽度 Y坐标=0

1：封装动画方法

- (CAAnimation*)Animation:(CGFloat)axisX jumpValue:(CGFloat)value  thisType:(int)type {
    CGMutablePathRef path = CGPathCreateMutable();
    CGPathMoveToPoint(path,NULL,axisX,DEVICE_Height);
  
    if (type==0) {
        
        CGPathAddLineToPoint(path, NULL, axisX, 283);
       
        
    }
    else if(type==1)
    {
        
        CGPathAddLineToPoint(path, NULL, axisX, 170);
   
        
    }
    else if(type==2)
    {
      
        CGPathAddLineToPoint(path, NULL, axisX, 200);
        
        
    }
    else
    {
       
        CGPathAddLineToPoint(path, NULL, axisX, 283);
    }
  CGPathAddLineToPoint(path, NULL, axisX, 179);
    CGPathAddLineToPoint(path, NULL, axisX, 207);
    CGPathAddLineToPoint(path, NULL, axisX, 187);
    CGPathAddLineToPoint(path, NULL, axisX, 199);
    CGPathAddLineToPoint(path, NULL, axisX, 193);
    CGPathAddLineToPoint(path, NULL, axisX, 195);
    CGPathAddLineToPoint(path, NULL, DEVICE_Width, 0);
     CAKeyframeAnimation *
    animation = [CAKeyframeAnimation
                 animationWithKeyPath:@"position"];
    [animation setPath:path];
    [animation setDuration:1.5];
    [animation setCalculationMode:kCAAnimationLinear];
    NSArray *  arr= [NSArray arrayWithObjects:[NSNumber numberWithFloat:0.0],
                     [NSNumber numberWithFloat:0.12],
                     [NSNumber numberWithFloat:0.24],
                     [NSNumber numberWithFloat:0.36],
                     [NSNumber numberWithFloat:0.48],
                     [NSNumber numberWithFloat:0.60],
                     [NSNumber numberWithFloat:0.72],
                     [NSNumber numberWithFloat:0.5],
                     [NSNumber numberWithFloat:value ],nil];
   
      [animation setKeyTimes:arr];
    [animation setTimingFunctions:[NSArray arrayWithObjects:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn],
                                   [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseOut],
                                   [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut],
                                   [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut],
                                   [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut],
                                   [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut],
                                   [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut],
                                   [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut],
                                   [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut], nil]];     animation.delegate=self;
    animation.duration=1.5;
    CFRelease(path);
    return animation;
}

View Code

2:调用

-(void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:YES];
   
     coinViewArray=[[NSMutableArray alloc]init];//这个数组是一个字段，用来保存底部弹出的视图，等动画结束需要将他们移除的
     CGFloat width=DEVICE_Width-60;
    CGFloat everyWidht=(width-60)/4;
     CGFloat theAxisX=30;
    for (int i=0; i<4; i++) {
        UIImageView *scView=[[UIImageView alloc]initWithFrame:CGRectMake(theAxisX+i*20+i*everyWidht, DEVICE_Height, everyWidht, everyWidht)];
        scView.image=[UIImage imageNamed:@"Coin.jpg"];
        scView.layer.cornerRadius=everyWidht/2;
        scView.backgroundColor=[UIColor redColor];
        [coinViewArray addObject:scView];
        CGFloat jumpValue;
        if (i==0) {
           
            jumpValue=1.2;
        }
        else if(i==1)
        {
             jumpValue=1.1;
              scView.backgroundColor=[UIColor yellowColor];
        }
        else if(i==2)
        {  scView.backgroundColor=[UIColor blueColor];
            jumpValue=1;
        }
        else
        {
             scView.backgroundColor=[UIColor greenColor];
             jumpValue=0.9;
            
        }
        
        [scView.layer addAnimation:[self Animation:scView.layer.position.x jumpValue:jumpValue thisType:i]
                            forKey:@"position"];
         [scView.layer setPosition:CGPointMake(scView.frame.origin.x,scView.frame.origin.y)];
       
        
        [self addSubview:scView];
    }
    
    UIImageView     *imgView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"LuckyCenterButton"]];
    imgView.backgroundColor=[UIColor redColor];
        imgView.frame = CGRectMake(100, 100, 50, 50);
        [self addSubview:imgView];
}

View Code

3:代理(动画结束移除执行动画之后保存在数组里面的视图）

- (void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag
{
    for (int i=0; i<coinViewArray.count; i++) {
        UIImageView *imageView=[coinViewArray objectAtIndex:i];
        
        [imageView removeFromSuperview];
    }
}

View Code

CAAnimationGroup主动画，贝塞尔设置关键帧动画的路径，中间实现缩放，透明.....

1：代码

-(void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:YES];
    
    UIImageView     *imgView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"LuckyCenterButton"]];
    imgView.backgroundColor=[UIColor redColor];
        imgView.frame = CGRectMake(100, 100, 50, 50);
        [self addSubview:imgView];
    
    
         //贝塞尔曲线路径
         UIBezierPath *movePath = [UIBezierPath bezierPath];
    // 设置动画的起点坐标
         [movePath moveToPoint:CGPointMake(DEVICE_Width/2-25, DEVICE_Height/2-25)];
//    、CABasicAnimation可看做是最多只有2个关键帧的CAKeyframeAnimation
   
    
    /*  [_pushCoverMudimViewController.view.superview addSubview:_customActionSheet];
     CAKeyframeAnimation *popAnimation = [CAKeyframeAnimation animationWithKeyPath:@"transform"];
     popAnimation.duration = 0.4;
     popAnimation.values = @[[NSValue valueWithCATransform3D:CATransform3DMakeScale(0.01f, 0.01f, 1.0f)],
     [NSValue valueWithCATransform3D:CATransform3DMakeScale(1.1f, 1.1f, 1.0f)],
     [NSValue valueWithCATransform3D:CATransform3DMakeScale(0.9f, 0.9f, 1.0f)],
     [NSValue valueWithCATransform3D:CATransform3DIdentity]];
     popAnimation.keyTimes = @[@0.2f, @0.5f, @0.75f, @1.0f];
     popAnimation.timingFunctions = @[[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut],
     [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut],
     [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]];
     [_customActionSheet.layer addAnimation:popAnimation forKey:nil];
     */
    
         [movePath addQuadCurveToPoint:CGPointMake(DEVICE_Width,0) controlPoint:self.view.center];
    
       //以下必须导入QuartzCore包
     　// 关键帧动画（位置）
         CAKeyframeAnimation * posAnim = [CAKeyframeAnimation animationWithKeyPath:@"position"];
          posAnim.path = movePath.CGPath;
         posAnim.removedOnCompletion = YES;
    
         //缩放动画
         CABasicAnimation *scaleAnim = [CABasicAnimation animationWithKeyPath:@"transform"];
         scaleAnim.fromValue = [NSValue valueWithCATransform3D:CATransform3DIdentity];
    
                                                                        //动画时的放大缩小倍数
         scaleAnim.toValue = [NSValue valueWithCATransform3D:CATransform3DMakeScale(0.3, 0.3, 1)];
          scaleAnim.removedOnCompletion = YES;
    
         //透明动画
         CABasicAnimation *opacityAnim = [CABasicAnimation animationWithKeyPath:@"alpha"];
         opacityAnim.fromValue = [NSNumber numberWithFloat:1.0];
          opacityAnim.toValue = [NSNumber numberWithFloat:0.1];
         opacityAnim.removedOnCompletion = YES;
    
         //动画组
         CAAnimationGroup *animGroup = [CAAnimationGroup animation];
    
        animGroup.animations = [NSArray arrayWithObjects:posAnim, scaleAnim, opacityAnim, nil];
        animGroup.duration = 10;
  //  这里需要对动画的两个属性进行设置，让图层在完成动画后停留在动画后的状态。a
    animGroup.fillMode = kCAFillModeForwards;
    animGroup.removedOnCompletion = NO;
        [imgView.layer addAnimation:animGroup forKey:nil];
 
}