duoshoubang/FirstLink/Compoments/详情模块/Views/FKCollectAni...

//
//  FKCollectAnimationTool.m
//  FirstLink
//
//  Created by jack on 15/9/10.
//  Copyright (c) 2015年 FirstLink. All rights reserved.
//

#import "FKCollectAnimationTool.h"

static NSString *COLLECT_ANIMATION_KEY = @"COLLECT_ANIMATION_KEY";
@implementation FKCollectAnimationTool

- (void)showAnimationWithCollect:(BOOL)collect inView:(UIView *)view{
    
    self.collectSelected = collect;
    UIWindow *window = [UIApplication sharedApplication].keyWindow;
    
    if (collect) {
        UIImageView *imageView = [[UIImageView alloc]initWithImage:[UIImage imageNamed:@"heart"]];
        [window.layer addSublayer:imageView.layer];
        imageView.layer.position = window.layer.position;
        imageView.layer.name = ANIMATION_LAYER_NAME;
        
        CAKeyframeAnimation *anim = [CAKeyframeAnimation animationWithKeyPath:@"transform"];
        CATransform3D transform1 = CATransform3DIdentity;
        CATransform3D transform2 = CATransform3DMakeScale(1.3f, 1.3f, 1.0f);
        CATransform3D transform3 = CATransform3DIdentity;
        anim.values = @[[NSValue valueWithCATransform3D:transform1], [NSValue valueWithCATransform3D:transform2], [NSValue valueWithCATransform3D:transform3]];
        anim.removedOnCompletion = NO;
        anim.fillMode = kCAFillModeForwards;
        
        
        CAKeyframeAnimation *alphaAnim = [CAKeyframeAnimation animationWithKeyPath:@"opacity"];
        alphaAnim.values = @[@0.8, @1.0, @0];
        alphaAnim.removedOnCompletion = NO;
        alphaAnim.fillMode = kCAFillModeForwards;
        
        CAAnimationGroup *group = [CAAnimationGroup animation];
        group.animations = @[anim, alphaAnim];
        group.duration = 0.7f;
        group.removedOnCompletion = NO;
        group.fillMode = kCAFillModeForwards;
        group.delegate = self;
        [imageView.layer addAnimation:group forKey:COLLECT_ANIMATION_KEY];
        
    }else{
        UIImageView *leftImgView = [[UIImageView alloc]initWithImage:[UIImage imageNamed:@"leftHeart"]];
        UIImageView *rightImgView = [[UIImageView alloc]initWithImage:[UIImage imageNamed:@"rightHeart"]];

        [window.layer addSublayer:leftImgView.layer];
        [window.layer addSublayer:rightImgView.layer];
        
        leftImgView.layer.name = ANIMATION_LAYER_NAME;
        rightImgView.layer.name = ANIMATION_LAYER_NAME;
        
        CGFloat leftH = leftImgView.intrinsicContentSize.height;
        CGFloat rightH = rightImgView.intrinsicContentSize.height;
        
        leftImgView.layer.anchorPoint = CGPointMake(1.0f, 1.0f);
        rightImgView.layer.anchorPoint = CGPointMake(0, 1.0f);
        
        leftImgView.layer.position = CGPointMake(window.layer.position.x, window.layer.position.y + leftH / 2);
        rightImgView.layer.position = CGPointMake(window.layer.position.x, window.layer.position.y + rightH / 2);
        
        
        CABasicAnimation *leftRotaAnim = [CABasicAnimation animationWithKeyPath:@"transform"];
        leftRotaAnim.fromValue = [NSValue valueWithCATransform3D:CATransform3DIdentity];
        leftRotaAnim.toValue = [NSValue valueWithCATransform3D:CATransform3DMakeRotation(- M_PI_4, 0, 0, 1.0)];
        leftRotaAnim.removedOnCompletion = NO;
        leftRotaAnim.fillMode = kCAFillModeForwards;
        
        CABasicAnimation *leftAlphaAnim = [CABasicAnimation animationWithKeyPath:@"opacity"];
        leftAlphaAnim.fromValue = @1.0;
        leftAlphaAnim.toValue = @0;
        leftAlphaAnim.removedOnCompletion = NO;
        leftAlphaAnim.fillMode = kCAFillModeForwards;
        
        CAAnimationGroup *leftGroup = [CAAnimationGroup animation];
        leftGroup.animations = @[leftRotaAnim, leftAlphaAnim];
        leftGroup.duration = 0.5f;
        leftGroup.removedOnCompletion = NO;
        leftGroup.fillMode = kCAFillModeForwards;
        leftGroup.delegate = self;
        
        CABasicAnimation *rightRotaAnim = [CABasicAnimation animationWithKeyPath:@"transform"];
        rightRotaAnim.fromValue = [NSValue valueWithCATransform3D:CATransform3DIdentity];
        rightRotaAnim.toValue = [NSValue valueWithCATransform3D:CATransform3DMakeRotation(M_PI_4, 0, 0, 1.0)];
        rightRotaAnim.removedOnCompletion = NO;
        rightRotaAnim.fillMode = kCAFillModeForwards;
        
        CABasicAnimation *rightAlphaAnim = [CABasicAnimation animationWithKeyPath:@"opacity"];
        rightAlphaAnim.fromValue = @1.0;
        rightAlphaAnim.toValue = @0;
        rightAlphaAnim.removedOnCompletion = NO;
        rightAlphaAnim.fillMode = kCAFillModeForwards;
        
        CAAnimationGroup *rightGroup = [CAAnimationGroup animation];
        rightGroup.animations = @[rightRotaAnim, rightAlphaAnim];
        rightGroup.duration = 0.5f;
        rightGroup.removedOnCompletion = NO;
        rightGroup.fillMode = kCAFillModeForwards;
        rightGroup.delegate = self;
        
        [leftImgView.layer addAnimation:leftGroup forKey:COLLECT_ANIMATION_KEY];
        [rightImgView.layer addAnimation:rightGroup forKey:COLLECT_ANIMATION_KEY];
    }
}

- (void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag{
    UIWindow *window = [UIApplication sharedApplication].keyWindow;
    
    CALayer *targetLayer = nil;
    for (CALayer *layer  in window.layer.sublayers) {
        if ([layer animationForKey:COLLECT_ANIMATION_KEY] == anim){
            targetLayer = layer;
            break;
        }
    }
    
    if (targetLayer) [targetLayer removeFromSuperlayer];
    
    BOOL finished = YES;
    for (CALayer *layer in window.layer.sublayers) {
        if ([layer.name isEqualToString:ANIMATION_LAYER_NAME]) {
            finished = NO;
            break;
        }
    }
    
    // window 上没有动画了，执行delegate
    if (finished) {
        if ([self.delegate respondsToSelector:@selector(allCollectAnimationFinish:)]){
            [self.delegate allCollectAnimationFinish:self];
        }
    }
}
@end