[Swift] 线性视图布局

主要代码：
[Objective-C] 查看源文件 复制代码

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        self.view.addSubview(CollectionView)
    }
    
    // MARK: - UICollectionView 懒加载方法
    private lazy var CollectionView: UICollectionView = {
        let clv = UICollectionView(frame:CGRectMake(0, 100, UIScreen.mainScreen().bounds.size.width, 300), collectionViewLayout:LXLineFlowLayout())
        clv.registerClass(LXLineViewCell.self, forCellWithReuseIdentifier: "keyboardCell")
        clv.dataSource = self
        return clv
    }()
    
    var startRefresh: (() -> (NSMutableArray)) {
        get {
            return {
                () -> (NSMutableArray)
                in
                let  arr = NSMutableArray()
                for i in 0...4 {
                    arr.addObject("\(i+1)")
                }
                return arr
            }
        }
    }
}

extension ViewController : UICollectionViewDataSource{
    
    func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int{
        return self.startRefresh().count
    }
    
    func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell{
        let cell = collectionView.dequeueReusableCellWithReuseIdentifier("keyboardCell", forIndexPath: indexPath) as! LXLineViewCell
        let arr = self.startRefresh()
        cell.indexStr = arr[indexPath.item] as? String
        return cell
    }


}