001-scroll-card

Scroll Card

Demo

Introduction

1. 图片水平滚动。
2. 根据位置有缩放效果。
3. 屏幕中间的图片会停到中间的位置。
4. UISegmentedControl。

Problem

1

This is likely occurring because the flow layout subclass _01_scroll_card.CustomLayout is modifying attributes returned by UICollectionViewFlowLayout without copying them

XCode 7: Copy Layoutattributes

override func layoutAttributesForElementsInRect(rect: CGRect) -> [UICollectionViewLayoutAttributes]? {
    let attributes = super.layoutAttributesForElementsInRect(rect)
    var attributesCopy = [UICollectionViewLayoutAttributes]()
    for itemAttributes in attributes! {
        let itemAttributesCopy = itemAttributes.copy() as! UICollectionViewLayoutAttributes
        // add the changes to the itemAttributesCopy                       
        attributesCopy.append(itemAttributesCopy)
    }

    return attributesCopy
}

Reference

• swift实现卡片横向滑动效果
• 抓住iOS的未来 - 30天学习编写30个Swift小程序 - 27