UICollectionView基礎(chǔ)
//MARK: - 屬性
//1.collectionView
var collectionView:UICollectionView? = nil
//MARK: - 生命周期
override func viewDidLoad() {
super.viewDidLoad()
//0.創(chuàng)建UICollectionViewFlowLayout對(duì)象,這個(gè)對(duì)象是專門(mén)負(fù)責(zé)collectionView的布局
//UICollectionViewFlowLayout:UICollectionViewLayout
let layout = UICollectionViewFlowLayout()
//a.設(shè)置每個(gè)cell的大小(有對(duì)應(yīng)的協(xié)議方法來(lái)設(shè)置每個(gè)cell的大小)
//layout.itemSize = CGSizeMake(100, 150)
//b.設(shè)置每個(gè)cell之間的最小間距(行間距和列間距)
layout.minimumLineSpacing = 0 //設(shè)置這個(gè)屬性就是直接設(shè)置了每一行cell之間的間距
layout.minimumInteritemSpacing = 0
//c.設(shè)置滾動(dòng)方向(默認(rèn)是上下滾動(dòng))
layout.scrollDirection = .Vertical
//1.創(chuàng)建UICollectionView對(duì)象
self.collectionView = UICollectionView.init(frame: self.view.bounds, collectionViewLayout: layout)
//2.添加到界面上
self.view.addSubview(self.collectionView!)
//3.設(shè)置背景顏色(默認(rèn)的背景顏色是黑色)
self.collectionView?.backgroundColor = UIColor.whiteColor()
//4.設(shè)置代理
self.collectionView?.dataSource = self
self.collectionView?.delegate = self
//5.注冊(cè)cell
//參數(shù)1:指定cell的類型
//參數(shù)2:復(fù)用id
self.collectionView?.registerClass(UICollectionViewCell.self, forCellWithReuseIdentifier: "cell")
}
}
//UICollectionViewDelegateFlowLayout:UICollectionViewDelegate:UIScrollViewDelegate
extension ViewController:UICollectionViewDelegateFlowLayout{
//1.設(shè)置每個(gè)cell的大小
//可以讓不同的分組設(shè)置不同的大小
//indexPath表示cell的位置 ->第幾組的第幾個(gè)
//indexPath.section -> 組
//indexPath.item -> 個(gè)
func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize{
//方案1:確定每個(gè)cell的大小,和每一行cell的個(gè)數(shù)去計(jì)算間距
//return CGSizeMake(100, 150)
//方案2:確定每個(gè)cell的間距,和每一行cell的個(gè)數(shù),去計(jì)算cell的大小
let width = self.view.bounds.width / 4
return CGSizeMake(width, 150)
}
//2.設(shè)置每個(gè)分組到collectionView上左下右的邊距
func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAtIndex section: Int) -> UIEdgeInsets{
//方案1:確定每個(gè)cell的大小,個(gè)每一行cell的個(gè)數(shù)去計(jì)算間距
let margin = (self.view.bounds.width - 100*3)/4
//return UIEdgeInsetsMake(margin, margin, margin, margin)
//方案2:確定每個(gè)cell的間距,和每一行cell的個(gè)數(shù),去計(jì)算cell的大小
//注意:每個(gè)cell之間的最小間距是10
return UIEdgeInsetsMake(0, 0, 0, 0)
}
}
//MARK: - collectionView DataSource
extension ViewController: UICollectionViewDataSource{
//1.設(shè)置每個(gè)分組的cell的個(gè)數(shù)(默認(rèn)分組數(shù)為1)
func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int{
return 100
}
//2.創(chuàng)建cell
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
//1.去復(fù)用池中查看是否有可以復(fù)用的cell,如果有就直接返回那個(gè)可以復(fù)用的cell;沒(méi)有就自動(dòng)創(chuàng)建一個(gè)新的cell返回。(在這兒之前必須注冊(cè)cell)
let cell = collectionView.dequeueReusableCellWithReuseIdentifier("cell", forIndexPath: indexPath)
//2.刷新數(shù)據(jù)
//CGFloat(arc4random()%256)/255
cell.backgroundColor = UIColor.init(red: CGFloat(arc4random()%256)/255, green: CGFloat(arc4random()%256)/255, blue: CGFloat(arc4random()%256)/255, alpha: 1)
//3.返回cell
return cell
}
UICollectionView無(wú)限循環(huán)
//MARK: - 屬性
//1.collectionView
var collectionView: UICollectionView? = nil
//2.數(shù)據(jù)源數(shù)組
lazy var dataArray:[UIImage] = {
var tempArray = [UIImage]()
//通過(guò)for循環(huán)創(chuàng)建4張圖片
for item in 1...4{
let image = UIImage.init(named: "35_\(item).jpg")
tempArray.append(image!)
}
return tempArray
}()
override func viewDidLoad() {
super.viewDidLoad()
//1.創(chuàng)建layout
let layout = UICollectionViewFlowLayout()
//a.設(shè)置最小間距
layout.minimumInteritemSpacing = 0
layout.minimumLineSpacing = 0
//b.設(shè)置滾動(dòng)方向
layout.scrollDirection = .Horizontal
//2.創(chuàng)建對(duì)象
self.collectionView = UICollectionView.init(frame: CGRectMake(0, 0, self.view.bounds.width, 200), collectionViewLayout:layout)
//3.添加到界面上
self.view.addSubview(self.collectionView!)
//4.設(shè)置代理
self.collectionView?.dataSource = self
self.collectionView?.delegate = self
//5.注冊(cè)cell
//a.注冊(cè)手寫(xiě)和storyBoard的cell
//self.collectionView?.registerClass(ManCollectionViewCell.self, forCellWithReuseIdentifier: "cell")
//b.注冊(cè)xib的cell
let nib = UINib.init(nibName: "XibCollectionViewCell", bundle: nil)
self.collectionView?.registerNib(nib, forCellWithReuseIdentifier: "cell")
//6.設(shè)置分頁(yè)
self.collectionView?.pagingEnabled = true
//7.設(shè)置偏移量
self.collectionView?.contentOffset = CGPointMake(1000000/2*self.view.bounds.width, 0)
}
}
//MARK: - delegate
extension ViewController: UICollectionViewDelegateFlowLayout{
func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize{
return collectionView.frame.size
}
func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAtIndex section: Int) -> UIEdgeInsets{
return UIEdgeInsetsMake(0, 0, 0, 0)
}
}
//MARK: - dataSource
extension ViewController:UICollectionViewDataSource{
//1.設(shè)置cell的個(gè)數(shù)
func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 1000000
}
//2.創(chuàng)建cell
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
//1.創(chuàng)建cell
let cell = collectionView.dequeueReusableCellWithReuseIdentifier("cell", forIndexPath: indexPath) as! XibCollectionViewCell
//2.刷新數(shù)據(jù)
cell.imageView.image = self.dataArray[indexPath.row%4]
cell.textLabel.text = "第\(indexPath.row%4)張圖片"
//3.返回?cái)?shù)據(jù)
return cell
}
//1.聲明所有的子視圖對(duì)應(yīng)的屬性
//2.在構(gòu)造方法中添加子視圖
//3.在layoutSubViews方法中去計(jì)算子視圖的frame
class ManCollectionViewCell: UICollectionViewCell {
//MARK: - 屬性
let imageView = UIImageView()
//MARK: - 構(gòu)造方法
override init(frame: CGRect) {
super.init(frame: frame)
self.contentView.addSubview(imageView)
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
//MARK: - 計(jì)算frame
override func layoutSubviews() {
super.layoutSubviews()
imageView.frame = self.bounds
}
UICollectionView分組
//MARK: - 生命周期
override func viewDidLoad() {
super.viewDidLoad()
//0.創(chuàng)建UICollectionViewFlowLayout對(duì)象,這個(gè)對(duì)象是專門(mén)負(fù)責(zé)collectionView的布局
//UICollectionViewFlowLayout:UICollectionViewLayout
let layout = UICollectionViewFlowLayout()
//a.設(shè)置每個(gè)cell的大小(有對(duì)應(yīng)的協(xié)議方法來(lái)設(shè)置每個(gè)cell的大小)
//layout.itemSize = CGSizeMake(100, 150)
//b.設(shè)置每個(gè)cell之間的最小間距(行間距和列間距)
layout.minimumLineSpacing = 0 //設(shè)置這個(gè)屬性就是直接設(shè)置了每一行cell之間的間距
layout.minimumInteritemSpacing = 0
//c.設(shè)置滾動(dòng)方向(默認(rèn)是上下滾動(dòng))
layout.scrollDirection = .Vertical
//1.創(chuàng)建UICollectionView對(duì)象
self.collectionView = UICollectionView.init(frame: self.view.bounds, collectionViewLayout: layout)
//2.添加到界面上
self.view.addSubview(self.collectionView!)
//3.設(shè)置背景顏色(默認(rèn)的背景顏色是黑色)
self.collectionView?.backgroundColor = UIColor.whiteColor()
//4.設(shè)置代理
self.collectionView?.dataSource = self
self.collectionView?.delegate = self
//5.注冊(cè)cell
//參數(shù)1:指定cell的類型
//參數(shù)2:復(fù)用id
self.collectionView?.registerClass(UICollectionViewCell.self, forCellWithReuseIdentifier: "cell")
//6.注冊(cè)view
//self.collectionView?.registerClass(UICollectionReusableView.self, forSupplementaryViewOfKind: UICollectionElementKindSectionHeader, withReuseIdentifier: "view")
self.collectionView?.registerNib(UINib.init(nibName: "XibReusableView", bundle: nil), forSupplementaryViewOfKind: UICollectionElementKindSectionHeader, withReuseIdentifier: "view")
}
}
//MARK: - delegate
//UICollectionViewDelegateFlowLayout:UICollectionViewDelegate:UIScrollViewDelegate
extension ViewController:UICollectionViewDelegateFlowLayout{
//1.設(shè)置每個(gè)cell的大小
//可以讓不同的分組設(shè)置不同的大小
//indexPath表示cell的位置 ->第幾組的第幾個(gè)
//indexPath.section -> 組
//indexPath.item -> 個(gè)
func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize{
//方案1:確定每個(gè)cell的大小,和每一行cell的個(gè)數(shù)去計(jì)算間距
//return CGSizeMake(100, 150)
//方案2:確定每個(gè)cell的間距,和每一行cell的個(gè)數(shù),去計(jì)算cell的大小
let width = self.view.bounds.width / 4
return CGSizeMake(width, 150)
}
//2.設(shè)置每個(gè)分組到collectionView上左下右的邊距
func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAtIndex section: Int) -> UIEdgeInsets{
//方案1:確定每個(gè)cell的大小,個(gè)每一行cell的個(gè)數(shù)去計(jì)算間距
let margin = (self.view.bounds.width - 100*3)/4
//return UIEdgeInsetsMake(margin, margin, margin, margin)
//方案2:確定每個(gè)cell的間距,和每一行cell的個(gè)數(shù),去計(jì)算cell的大小
//注意:每個(gè)cell之間的最小間距是10
return UIEdgeInsetsMake(0, 0, 20, 0)
}
//MARK: - 設(shè)置header的大小
//3.設(shè)置header的大小
func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, referenceSizeForHeaderInSection section: Int) -> CGSize{
return CGSizeMake(300, 60)
}
}
//MARK: - collectionView DataSource
extension ViewController: UICollectionViewDataSource{
//0.設(shè)置分組數(shù)(默認(rèn)是1)
func numberOfSectionsInCollectionView(collectionView: UICollectionView) -> Int{
return 3
}
//1.設(shè)置每個(gè)分組的cell的個(gè)數(shù)(默認(rèn)分組數(shù)為1)
func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int{
switch section {
case 0:
return 7
case 1:
return 5
default:
return 11
}
}
//2.創(chuàng)建cell
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
//1.去復(fù)用池中查看是否有可以復(fù)用的cell,如果有就直接返回那個(gè)可以復(fù)用的cell;沒(méi)有就自動(dòng)創(chuàng)建一個(gè)新的cell返回。(在這兒之前必須注冊(cè)cell)
let cell = collectionView.dequeueReusableCellWithReuseIdentifier("cell", forIndexPath: indexPath)
//2.刷新數(shù)據(jù)
//CGFloat(arc4random()%256)/255
cell.backgroundColor = UIColor.init(red: CGFloat(arc4random()%256)/255, green: CGFloat(arc4random()%256)/255, blue: CGFloat(arc4random()%256)/255, alpha: 1)
//3.返回cell
return cell
}
//MARK: - 創(chuàng)建headerView
//3.設(shè)置headerView和footerView
//參數(shù)2:類型 ->標(biāo)識(shí)當(dāng)前設(shè)置的headerView還是footerView
//參數(shù)3:indexPath位置
//返回值:創(chuàng)建好的headerView/footerView
func collectionView(collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, atIndexPath indexPath: NSIndexPath) -> UICollectionReusableView{
//UICollectionView中創(chuàng)建headerView的過(guò)程和創(chuàng)建cell的過(guò)程基本一樣
//1.去復(fù)用池中查找是否有可以復(fù)用的View,如果找到了就直接返回。沒(méi)有找到就會(huì)自動(dòng)去創(chuàng)建一個(gè)新的view.(在使用這個(gè)方法前需要注冊(cè)view)
//參數(shù)1:確定當(dāng)前要?jiǎng)?chuàng)建的headerView還是footerView
//UICollectionElementKindSectionHeader ->headerView
//UICollectionElementKindSectionFooter ->footerView
//參數(shù)2.復(fù)用id
//參數(shù)3:header的位置
let reuseView = collectionView.dequeueReusableSupplementaryViewOfKind(UICollectionElementKindSectionHeader, withReuseIdentifier: "view", forIndexPath: indexPath) as! XibReusableView
//2.刷新數(shù)據(jù)
let titles = ["周星馳系列","經(jīng)典電影","每一份父愛(ài)"]
reuseView.titleLabel.text = titles[indexPath.section]
//3.返回view
return reuseView
}