我以前做的swift笔记, 之前都是整理在onenote上, 最近想到整理出博客. 也方便自己查找, 可以当做自己的一份文档.
import UIKit
class ViewController: UIViewController, UICollectionViewDataSource, UICollectionViewDelegate {
override func viewDidLoad() {
super.viewDidLoad()
setupUI()
}
func setupUI() {
let flowLayout = UICollectionViewFlowLayout.init()
flowLayout.itemSize = CGSize(width: 100, height: 100)
let collectionView = UICollectionView.init(frame: view.bounds, collectionViewLayout: flowLayout)
view.addSubview(collectionView)
collectionView.register(UICollectionViewCell.self, forCellWithReuseIdentifier: "cellID")
collectionView.dataSource = self
collectionView.delegate = self
collectionView.backgroundColor = UIColor.white
}
func numberOfSections(in collectionView: UICollectionView) -> Int {
return 1
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 20
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cellID", for: indexPath)
cell.backgroundColor = UIColor.blue
return cell
}
//移动
func collectionView(_ collectionView: UICollectionView, moveItemAt sourceIndexPath: IndexPath, to destinationIndexPath: IndexPath) {
}
}
