小论动画分析

一手指天，一手指地。

天就是网络， 天网呗

地，就是数据库

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Code4App 动画分析, 好烂啊

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Code4App上面找的动画，基本都是UIView 层的，简单的 设置属性，

非常的基础， 适合 初学者 练习。

觉得 比较好看的动画，
翻源码， 发现 ：实现 很 Low, 工程性 很差。

+ (void)showTitle:(NSString *)title KRPopupViewModelArray:(NSMutableArray *)modelArray Target:(UIViewController<KRPopupViewCellDelegate> * )target{
    
    KRPopupView * krPopupView = [[KRPopupView alloc] initWithFrame:CGRectMake(0, 20, kScreenWidth, kScreenHeight )];
    
    UIViewController * vc = target;
    [vc.view addSubview: krPopupView];

    NSMutableArray * viewArray = [NSMutableArray new];
    
    for (int i = 0; i < modelArray.count + 1; i++) {
        
        if (i == 0) {
            
            KRPopupHeaderView * headerView = [[[NSBundle mainBundle] loadNibNamed:@"KRPopupHeaderView" owner:self options:nil] firstObject];
            
            headerView.frame           = CGRectMake(0, [UIScreen mainScreen].bounds.size.height, [UIScreen mainScreen].bounds.size.width, KR_HEADERVIEW_HEIGHT);
            headerView.alpha           = 0.2f;
            headerView.delegate        = krPopupView;
            headerView.titleLabel.text = title;
            
            [viewArray addObject:headerView];
            [krPopupView addSubview:headerView];
            
        }else{
            
            KRPopupViewCell * cell = [[[NSBundle mainBundle] loadNibNamed:@"KRPopupViewCell" owner:self options:nil] firstObject];
            cell.frame = CGRectMake(0, kScreenHeight, kScreenWidth, 120);
            cell.alpha = 0.2f;
            cell.tag  = i - 1;
            cell.delegate = target;
            cell.model = modelArray[i-1];
            
            [viewArray addObject:cell];
            [krPopupView addSubview:cell];
        }
    }
    
    [krPopupView showWithViewArray:viewArray];
}

- (void)showWithViewArray:(NSMutableArray *)array{
    
    static double durationTime;
    
    durationTime = 0.0;
    
    for (int i = 0; i < array.count; i++) {
        
        if (i == 0) {
            
            KRPopupHeaderView * headerView = [array firstObject];
            [UIView animateWithDuration:KR_DURATION_TIME animations:^{
                headerView.frame = CGRectMake(0, 0, kScreenWidth, KR_HEADERVIEW_HEIGHT);
                headerView.alpha = 1.f;
            }];
            
        }else{
            
            KRPopupViewCell * cell = array[i];
            [UIView animateWithDuration:KR_DURATION_TIME delay:durationTime options:UIViewAnimationOptionCurveEaseOut animations:^{
                cell.frame = CGRectMake(0, (i - 1) * KR_CELLVIEW_HEIGHT + KR_HEADERVIEW_HEIGHT, kScreenWidth, KR_CELLVIEW_HEIGHT);
                cell.alpha = 1.f;
            } completion:nil];
            
        }
        
        //增加延迟
        durationTime += KR_DURATION_TIME - 0.1;
    }
    
}