封装

---

Button:

fun GenearateBtn(title:String,titleColor:UIColor,frame:CGRect,backgroundColor:UIColor,action:Selector){
    let Btn = UIButton(frame: frame)
    Btn.setTitle(title, for: .normal)
    Btn.setTitleColor(titleColor, for: .normal)
    Btn.backgroundColor = backgroundColor
    Btn.addTarget(self, action: action, for: .touchUpInside)
    view.addSubview(Btn)
}

---

Banner轮播(CollectionView):

class Banner: UIView{

var CollectionView: UICollectionView?
var flowlayout = UICollectionViewFlowLayout()
var pageControl = UIPageControl()

override init(frame: CGRect) {
    super.init(frame: frame)
    self.createSubviews(frame: frame)
}

func createSubviews(frame: CGRect){
    CollectionView = UICollectionView(frame: CGRect(x: 0, y: 0, width: frame.size.width, height: frame.size.height)
        , collectionViewLayout: flowlayout)
    flowlayout.itemSize = CGSize(width:frame.size.width, height:frame.size.height)
    flowlayout.minimumInteritemSpacing = 0;
    flowlayout.minimumLineSpacing = 0;
    flowlayout.scrollDirection = UICollectionViewScrollDirection.horizontal
    CollectionView!.backgroundColor = UIColor.lightGray
    CollectionView!.isPagingEnabled = true
    CollectionView!.dataSource  = self
    CollectionView!.delegate = self
    CollectionView!.showsHorizontalScrollIndicator = false
    CollectionView!.showsVerticalScrollIndicator = false
    CollectionView!.register(UICollectionViewCell.self, forCellWithReuseIdentifier: "cell")
    self.addSubview(CollectionView!)
    pageControl = UIPageControl.init(frame: CGRect(x:0,y: 0,width:frame.size.width / 2,height:30))
    pageControl.center = CGPoint(x:frame.size.width / 2, y:frame.size.height - 20);
    self.addSubview(pageControl);
    
    self.addTimer()
}

func addTimer(){
    let timer1 = Timer.init(timeInterval: 5, target: self, selector: #selector(nextPageView), userInfo: nil, repeats: true)
    RunLoop.current.add(timer1, forMode: RunLoopMode.commonModes)
    timer = timer1
}

func nextPageView(){
    
    let indexPath = self.CollectionView!.indexPathsForVisibleItems.last
    var item = (indexPath?.item)! + 1;
    var section = indexPath!.section;
    //滑动到最后一个item的时候，下一个变为下一Section的第一个
    if item == images.count {
        item = 0
        section += 1
    }
    self.pageControl.currentPage = item;
    let nextIndexPath = IndexPath(row: item, section: section)
    CollectionView!.scrollToItem(at: nextIndexPath, at: UICollectionViewScrollPosition.left, animated: true)
}

required init?(coder aDecoder: NSCoder) {
    fatalError("init(coder:) has not been implemented")
}

}

extension Banner:UICollectionViewDelegate, UICollectionViewDataSource{

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    let cell = CollectionView?.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath)
    let colorArr = [UIColor.blue,UIColor.black,UIColor.cyan]
    cell?.backgroundColor = colorArr[indexPath.row]
    return cell!
}

func numberOfSections(in collectionView: UICollectionView) -> Int {
    return 99999
}

func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
    return 3
}

}

---

Button Section：

//产生按钮区域
func setupButtonView(){
    let View = UIView()
    View.width = SCREEN_WIDTH

    //ButtonView的起始Y
    View.frame.origin.y = 150

    self.view.addSubview(View)
    let styleLabel = setStyleLabel("按钮Section")
    View.addSubview(styleLabel)
    //测试数组，按钮的名字
    let nameGroup = ["哈哈","哈哈","哈哈","哈哈","哈哈","哈哈","哈哈"]
    for index in 0 ..< nameGroup.count {
        let button = setupButton(CGFloat(index),inGroup: nameGroup  )
        
        if index == nameGroup.count - 1{
            View.height = button.frame.maxY + 10
        }
        View.addSubview(button)
        ViewY = View.frame.maxY
    }
    view.addSubview(View)
}
//按钮区域的名字Label
func setStyleLabel(_ labelName:String) -> UILabel{
    let styleLabel = UILabel(frame: CGRect(x: 5, y: 5, width: SCREEN_WIDTH - 10, height: 10))
    styleLabel.text = labelName
    return styleLabel
}
//产生按钮
func setupButton(_ index:CGFloat,inGroup:[String]) -> circleButton{
    let buttonWH = SCREEN_WIDTH / 4
    let button = circleButton(frame: CGRect(x: index.truncatingRemainder(dividingBy: 4) * SCREEN_WIDTH/4 , y: 20, width: buttonWH, height: buttonWH))
    button.setImage(UIImage(named:"test"), for: .normal)
    if index > 3 {
        button.frame.origin.y = buttonWH + 20
    }
    button.setTitle("按钮", for: .normal)
    return button
}

---

Button Section里的circleButton：

import UIKit

class circleButton: UIButton {

override func layoutSubviews() {
    super.layoutSubviews()
    imageView?.frame.origin.x = 10
    imageView?.width = self.width - 20
    imageView?.height = (imageView?.width)!
    imageView?.layer.cornerRadius = (self.width - 20) / 2
    imageView?.layer.masksToBounds = true
    
    titleLabel?.frame.origin.x = 0
    titleLabel?.frame.origin.y = imageView!.height
    titleLabel?.width = self.width
    titleLabel?.height = self.height - self.titleLabel!.frame.origin.y
    titleLabel?.textAlignment = .center
    titleLabel?.font = UIFont.systemFont(ofSize: 12)
    titleLabel?.textColor = UIColor.black
}

}

---

输入框随键盘升起

import UIKit

class ViewController: UIViewController {

let SCREENW = UIScreen.main.bounds.width
let SCREENH = UIScreen.main.bounds.height

var commentBtn:UIButton!
var inputLineView:UIView!
var inputTextView:UITextView!
var layView:UIView?

var changeY:CGFloat!
var keyboardDuration:Double!

override func viewDidLoad() {
    super.viewDidLoad()
    //注册键盘的监听
    let notiCenter =  NotificationCenter.default
    notiCenter.addObserver(self, selector: #selector(keyBoardWillShow), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
    notiCenter.addObserver(self, selector: #selector(keyBoardWillHide), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
    //评论按钮
    commentBtn = UIButton(frame: CGRect(x: 100, y: 100 , width: 100, height: 100))
    commentBtn.setTitle("Comment", for: .normal)
    commentBtn.setTitleColor(UIColor.white, for: .normal)
    commentBtn.backgroundColor = UIColor.blue
    commentBtn.addTarget(self, action: #selector(CommentBtnClick), for: .touchUpInside)
    view.addSubview(commentBtn)
  
}

func keyBoardWillShow(notifction:NSNotification){
    let kbInfo = notifction.userInfo
    //获取键盘的size
    let kbRect = (kbInfo?[UIKeyboardFrameEndUserInfoKey] as! NSValue).cgRectValue
    //键盘的y偏移量
    changeY = kbRect.origin.y - SCREENH
    
    //键盘弹出的时间
    keyboardDuration = kbInfo?[UIKeyboardAnimationDurationUserInfoKey] as! Double
    
    //界面偏移动画
    UIView.animate(withDuration: keyboardDuration) {
        self.inputLineView.transform = CGAffineTransform(translationX: 0, y: self.changeY - self.inputLineView.frame.height)
    }
}

func keyBoardWillHide(notifction:NSNotification){
    UIView.animate(withDuration: 0.25) {
        self.inputLineView.transform = CGAffineTransform(translationX: 0, y: self.SCREENH)
        self.layView?.isHidden = true
    }
}


func CommentBtnClick(){

    if inputLineView == nil{
        inputLineView = UIView(frame: CGRect(x: 0, y: SCREENH , width: SCREENW, height: 50))
        inputLineView.backgroundColor = UIColor.cyan
        view.addSubview(inputLineView)
 
        inputTextView = UITextView(frame: CGRect(x: 3, y: 3, width: SCREENW - 6, height: 44))
        inputTextView.layer.borderColor = UIColor.darkGray.cgColor
        inputTextView.layer.borderWidth = 1
        inputLineView.addSubview(inputTextView)
        inputTextView.becomeFirstResponder()
    } else {
        inputTextView.becomeFirstResponder()
    }
    
    if layView == nil{
        self.layView = UIView(frame: self.view.frame)
        layView?.backgroundColor = UIColor.gray
        layView?.alpha = 0.5
        let tap = UITapGestureRecognizer(target: self, action: #selector(tapLayView))
        layView?.addGestureRecognizer(tap)
        self.view.insertSubview(layView!, belowSubview: inputLineView!)
    } else {
        layView?.isHidden = false
    }

}
//点击layView，收回键盘
func tapLayView(){
    self.inputTextView.resignFirstResponder()
}

}