苹果开发之iOS加入购物车动画效果

作者：袖梨 2022-06-25
 代码如下 复制代码
#pragma mark -购物篮按钮点击事件
-(void)shoppingCartButtonAction:(UIButton*)sender
{
    if ([[userDef objectForKey:@"id"]isEqualToString:@"0"]) {
        [self showHUDTextOnly:@"请登录后，再进行操作" ];
        return;
    }
    NSDictionary *parameters = @{
                                 @"user_id":[userDef objectForKey:@"id"],
                                 @"gp_id":[NSString stringWithFormat:@"%@",[cell2Array[sender.tag - 101] objectForKey:@"gp_id"]],
                                 @"number" :@1
                                 };
    [self defaultRequestwithURL:KAddToCartURL withParameters:parameters withMethod:@"POST" withBlock:^(NSDictionary *dict, NSError *error){
         if ([[dict objectForKey:kCode] integerValue]==1) {
             //该部分动画 以self.view为参考系进行
             UIImageView *imageView=[[UIImageView alloc]initWithImage:[UIImage imageNamed:@"button_hot_shopping-cart_red-1"]];
             imageView.contentMode=UIViewContentModeCenter;
             imageView.frame = sender.bounds;
             imageView.hidden=YES;
             CGPoint point= sender.frame.origin;
             imageView.center=point;
             CALayer *layer=[[CALayer alloc]init];
             layer.contents=imageView.layer.contents;
             layer.frame=imageView.frame;
             layer.opacity=1;
             [self.view.layer addSublayer:layer];
             //动画 终点 都以sel.view为参考系
             CGPoint endpoint= CGPointMake(SCREEN_WIDTH*7/10.0, SCREEN_HEIGHT - 22);
             UIBezierPath *path=[UIBezierPath bezierPath];
             //动画起点
             CGRect rect=[sender convertRect: sender.bounds toView:self.view];
             CGPoint startPoint=CGPointMake(rect.origin.x +rect.size.width/2, rect.origin.y +rect.size.height/2);
             [path moveToPoint:startPoint];
             //贝塞尔曲线中间点
             float sx=startPoint.x;
             float sy=startPoint.y;
             float ex=endpoint.x;
             float ey=endpoint.y;
             float x=sx+(ex-sx)/3;
             float y=sy+(ey-sy)*0.5-400;
             CGPoint centerPoint=CGPointMake(x,y);
             [path addQuadCurveToPoint:endpoint controlPoint:centerPoint];
             
             CAKeyframeAnimation *animation=[CAKeyframeAnimation animationWithKeyPath:@"position"];
             animation.path = path.CGPath;
             animation.removedOnCompletion = NO;
             animation.fillMode = kCAFillModeForwards;
             animation.duration=0.8;
             animation.delegate=self;
             animation.autoreverses= NO;
             animation.timingFunction=[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn];
             [layer addAnimation:animation forKey:@"buy"];
             //更新角标
             [self cornerNumber];
         }else {
             [self showHUDTextOnly:[dict objectForKey:kMessage]];
        }
     }];
}

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