duoshoubang/FirstLink/Compoments/详情模块/商品详情/Model/FKAddBasketA...

//
//  FKAddBasketAnimation.m
//  FirstLink
//
//  Created by jack on 16/5/9.
//  Copyright © 2016年 FirstLink. All rights reserved.
//

#import "FKAddBasketAnimTool.h"

static NSString *SCALE_ANIM_IDENTIFY = @"SCALE_ANIM_IDENTIFY";
static NSString *GROUP_ANIM_IDENTIFY = @"GROUP_ANIM_IDENTIFY";
static NSString *MOVE_POINT_KEY      = @"MOVE_POINT_KEY";

@interface FKAddBasketAnimTool ()

@property (nonatomic, strong) UIImageView *imageView;
@property (nonatomic, strong) CABasicAnimation *scaleAnim;
@property (nonatomic, strong) CAAnimationGroup *animGroup;

@property (nonatomic, assign) BOOL    removedOnComplition;

@end

@implementation FKAddBasketAnimTool

- (instancetype)init{
    if (self = [super init]) {
        self.scale = 4.0f;
        self.scaleDuration = 0.4f;
        self.moveDuration = 0.4f;
        self.removedOnComplition = YES;
        
        self.margin = 30.0f;
    }
    return self;
}

- (void)showInView:(UIView *)inView targetView:(UIView *)targetView{
    
    if (!inView || !targetView) return;

    CGPoint centerPoint = inView.center;
    CGRect targetFrame = [targetView convertRect:targetView.bounds toView:inView];
    CGPoint targetPoint = CGPointMake(CGRectGetMidX(targetFrame), CGRectGetMidY(targetFrame));
    CGPoint moveTarget = CGPointMake(targetPoint.x - centerPoint.x, targetPoint.y - centerPoint.y);
    
    [self.scaleAnim setValue:[NSValue valueWithCGPoint:moveTarget] forKey:MOVE_POINT_KEY];
    
    [inView addSubview:self.imageView];
    self.imageView.center = inView.center;
    if (self.image){
        self.imageView.image = self.image;
    }else if (self.picUrl.length){
        [self.imageView setImageWithURL:self.picUrl cdnWidth:80];
    }
    
    [self.imageView.layer addAnimation:self.scaleAnim forKey:SCALE_ANIM_IDENTIFY];
    
}

- (void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag{
    
//    NSString *identify = [[anim valueForKey:ANIMTIOAN_IDENTIFY_KEY] stringValue];
    
    CAAnimation *scaleAnim = [self.imageView.layer animationForKey:SCALE_ANIM_IDENTIFY];
    CAAnimation *groupAnim = [self.imageView.layer animationForKey:GROUP_ANIM_IDENTIFY];
    
    if (anim == scaleAnim && flag){
        
        CGPoint movePoint = [[self.scaleAnim valueForKey:MOVE_POINT_KEY] CGPointValue];
        CATransform3D trans2 = CATransform3DMakeTranslation(movePoint.x, movePoint.y, 0);
        
        //同一keypath只能保留一个animation状态
        self.imageView.layer.transform = CATransform3DMakeScale(self.scale, self.scale, 1.0f);
        
        CABasicAnimation *anim1 = [CABasicAnimation animationWithKeyPath:@"transform"];
        anim1.fromValue = [NSValue valueWithCATransform3D:self.imageView.layer.transform];
        anim1.toValue = [NSValue valueWithCATransform3D:CATransform3DMakeScale(1.0f, 1.0f, 1.0f)];
        anim1.duration = self.moveDuration;
        anim1.removedOnCompletion = NO;
        anim1.fillMode = kCAFillModeForwards;
        
        CABasicAnimation *anim2 = [CABasicAnimation animationWithKeyPath:@"transform"];
        anim2.fromValue = [NSValue valueWithCATransform3D:self.imageView.layer.transform];
        anim2.toValue = [NSValue valueWithCATransform3D:trans2];
        anim2.duration = self.moveDuration;
        anim2.removedOnCompletion = NO;
        anim2.fillMode = kCAFillModeForwards;

        self.animGroup.animations = @[anim1, anim2];
    
        [self.imageView.layer addAnimation:self.animGroup forKey:GROUP_ANIM_IDENTIFY];

    }else if (anim == groupAnim && flag){
        [self.imageView removeFromSuperview];
        [self.imageView.layer removeAllAnimations];
        
        if (self.finishBlock){
            self.finishBlock();
        }
    }else if (!flag){
        // 如果动画没有执行完成
        [self.imageView removeFromSuperview];
        [self.imageView.layer removeAllAnimations];
    }
}

#pragma mark - property

- (UIImageView *)imageView{
    if (_imageView == nil) {
        _imageView = [[UIImageView alloc]init];
        _imageView.bounds = CGRectMake(0, 0, self.margin, self.margin);
        _imageView.layer.cornerRadius = self.margin / 2.0f;
        _imageView.layer.masksToBounds = YES;
        _imageView.backgroundColor = [UIColor whiteColor];
    }
    return _imageView;
}

- (CABasicAnimation *)scaleAnim{
    if (_scaleAnim == nil) {
        _scaleAnim = [CABasicAnimation animationWithKeyPath:@"transform"];
        _scaleAnim.fromValue = [NSValue valueWithCATransform3D:CATransform3DIdentity];
        _scaleAnim.toValue = [NSValue valueWithCATransform3D:CATransform3DMakeScale(self.scale, self.scale, 1.0f)];
        _scaleAnim.duration = self.scaleDuration;
        _scaleAnim.delegate = self;
        _scaleAnim.removedOnCompletion = NO;
        _scaleAnim.fillMode = kCAFillModeForwards;
    }
    return _scaleAnim;
}

- (CAAnimationGroup *)animGroup{
    if (_animGroup == nil) {
        _animGroup = [[CAAnimationGroup alloc]init];
        _animGroup.duration = self.moveDuration;
        _animGroup.removedOnCompletion = NO;
        _animGroup.delegate = self;
    }
    return _animGroup;
}
@end