import UIKit
class ViewController: UIViewController,UICollectionViewDelegate,UICollectionViewDataSource,UICollectionViewDelegateFlowLayout {
var colletionView : UICollectionView?
var dataArr = NSMutableArray()
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
let layout = UICollectionViewFlowLayout()
colletionView = UICollectionView(frame: CGRectMake(0, 0, UIScreen .mainScreen().bounds.width, UIScreen .mainScreen().bounds.height), collectionViewLayout: layout)
//注册一个cell
colletionView! .registerClass(UICollectionViewCell.self, forCellWithReuseIdentifier:"cell")
colletionView?.delegate = self;
colletionView?.dataSource = self;
colletionView?.backgroundColor = UIColor.whiteColor()
//设置每一个cell的宽高
layout.itemSize = CGSizeMake((UIScreen .mainScreen().bounds.width-30)/2, 250)
self.view .addSubview(colletionView!)
}
//返回多少个组
func numberOfSectionsInCollectionView(collectionView: UICollectionView) -> Int {
return 1
}
//返回多少个cell
func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 10
}
//返回自定义的cell
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCellWithReuseIdentifier("cell", forIndexPath: indexPath)
let R = (arc4random() % 256)
let G = (arc4random() % 256)
let B = (arc4random() % 256)
cell.backgroundColor = UIColor(red: CGFloat(R)/255, green: CGFloat(G)/255, blue: CGFloat(B)/255, alpha: 1.0)
return cell
}
//返回cell 上下左右的间距
func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAtIndex section: Int) -> UIEdgeInsets{
return UIEdgeInsetsMake(10, 10, 10, 10)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
