Swift瀑布流
import UIKit
```
import SDWebImage
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
self.view.addSubview(CollectionView)
}
// MARK: - UICollectionView Lazy loading method
private lazy var CollectionView: UICollectionView = {
let lxLayOuy = LXLayOut()
lxLayOuy.delegate = self
let clv = UICollectionView(frame: UIScreen.mainScreen().bounds, collectionViewLayout:lxLayOuy)
clv.registerClass(UICollectionViewCell.self, forCellWithReuseIdentifier: String(UICollectionViewCell))
clv.dataSource = self
clv.delegate = self
return clv
}()
private lazy var shops:[LXShop] = {
return LXShop.getShops()
}()
}
extension ViewController : UICollectionViewDataSource{
func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int{
return shops.count
}
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell{
let cell = collectionView.dequeueReusableCellWithReuseIdentifier(String(UICollectionViewCell), forIndexPath: indexPath)
cell.backgroundColor = UIColor.redColor()
var img = cell.viewWithTag(111) as? UIImageView
if img == nil {
img = UIImageView()
img?.tag = 111
cell.contentView.addSubview(img!)
}
let url = NSURL(string: shops[indexPath.item].img as! String)
img!.frame = CGRectMake(0, 0, cell.frame.size.width, cell.frame.size.height)
img!.sd_setImageWithURL(url!, placeholderImage: UIImage(named: "5"), options: SDWebImageOptions.HighPriority)
return cell
}
}
extension ViewController : UICollectionViewDelegate{
func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath) {
print(indexPath)
}
}
// MARK: - LXLayOutDelegate method
extension ViewController : LXLayOutDelegate{
func getLayOutDatas(layOut: LXLayOut, width: CGFloat, index: Int) -> CGFloat {
let sp = shops[index]
return width * sp.h / sp.w
}
func getColumnMargin() -> CGFloat {
return 10
}
func getRowMargin() -> CGFloat {
return 10
}
func getColumnCount() -> Int {
return 2
}
func getEdgeInsets() -> UIEdgeInsets {
return UIEdgeInsets(top: 10, left: 10, bottom: 10, right: 10)
}
}
这个是布局
import UIKit
import SDWebImage
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
self.view.addSubview(CollectionView)
}
// MARK: - UICollectionView Lazy loading method
private lazy var CollectionView: UICollectionView = {
let lxLayOuy = LXLayOut()
lxLayOuy.delegate = self
let clv = UICollectionView(frame: UIScreen.mainScreen().bounds, collectionViewLayout:lxLayOuy)
clv.registerClass(UICollectionViewCell.self, forCellWithReuseIdentifier: String(UICollectionViewCell))
clv.dataSource = self
clv.delegate = self
return clv
}()
private lazy var shops:[LXShop] = {
return LXShop.getShops()
}()
}
extension ViewController : UICollectionViewDataSource{
func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int{
return shops.count
}
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell{
let cell = collectionView.dequeueReusableCellWithReuseIdentifier(String(UICollectionViewCell), forIndexPath: indexPath)
cell.backgroundColor = UIColor.redColor()
var img = cell.viewWithTag(111) as? UIImageView
if img == nil {
img = UIImageView()
img?.tag = 111
cell.contentView.addSubview(img!)
}
let url = NSURL(string: shops[indexPath.item].img as! String)
img!.frame = CGRectMake(0, 0, cell.frame.size.width, cell.frame.size.height)
img!.sd_setImageWithURL(url!, placeholderImage: UIImage(named: "5"), options: SDWebImageOptions.HighPriority)
return cell
}
}
extension ViewController : UICollectionViewDelegate{
func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath) {
print(indexPath)
}
}
// MARK: - LXLayOutDelegate method
extension ViewController : LXLayOutDelegate{
func getLayOutDatas(layOut: LXLayOut, width: CGFloat, index: Int) -> CGFloat {
let sp = shops[index]
return width * sp.h / sp.w
}
func getColumnMargin() -> CGFloat {
return 10
}
func getRowMargin() -> CGFloat {
return 10
}
func getColumnCount() -> Int {
return 2
}
func getEdgeInsets() -> UIEdgeInsets {
return UIEdgeInsets(top: 10, left: 10, bottom: 10, right: 10)
}
}
```
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