第一次用swift写分页demo
http://git.oschina.net/lotusome/PageViewDemo
第一次用swift分页demo
http://git.oschina.net/lotusome/PageViewDemo
主要用到两个文件
//
// PageView.swift
// PhotoDemo
//
// Created by qings on 16/1/24.
// Copyright © 2016年 pukaila. All rights reserved.
//
import Foundation
import UIKit
class PageView : UIView {
var nextButton:UIButton!
var prevButton:UIButton!
var nextButtonWidth:Int!
var prevButtonWidth:Int!
var prevBtnCallback:((page:Int)->(Void))?
var nextBtnCallback:((page:Int)->(Void))?
var pageNumCallback:((page:Int)->(Void))?
var currentPageNum:Int!
var oldPageNum:Int!
var pageScrollView:PageScrollView!
var pageScrollViewPageSize:Int!
var pageScrollViewPageNumHeight:Int!
var pageScrollViewPageNumWidth:Int!
var pageScrollViewPageNumSpacing:Int!
var callback:((page:Int)->(Void))?
override init(frame: CGRect) {
super.init(frame:frame)
}
func doInit(){
initView()
initEven()
}
func initView() {
oldPageNum = currentPageNum
let x = nextButtonWidth
let y = 0
let w = Int(frame.width) - nextButtonWidth - nextButtonWidth
let h = Int(frame.height)
pageScrollView = PageScrollView(frame: CGRectMake(CGFloat(x), CGFloat(y), CGFloat(w), CGFloat(h)))
pageScrollView.pageSize = pageScrollViewPageSize
pageScrollView.pageHeight = pageScrollViewPageNumHeight
pageScrollView.pageWidth = pageScrollViewPageNumWidth
pageScrollView.spacing = pageScrollViewPageNumSpacing
pageScrollView.backgroundColor = UIColor.grayColor()
pageScrollView.showsHorizontalScrollIndicator = true
pageScrollView.currentPageNum = currentPageNum
pageScrollView.addPageNumItem()
pageScrollView.callback={(page)->Void in
self.oldPageNum = self.currentPageNum
self.currentPageNum = page
self.pageScrollView.setColor(self.oldPageNum, color: self.pageScrollView.normalColor)
self.pageScrollView.setColor(self.currentPageNum, color: self.pageScrollView.currentColor)
self.callback!(page:self.currentPageNum)
self.moveToCenterByPageNum(self.currentPageNum)
}
self.addSubview(pageScrollView)
prevButton = initButton(CGRectMake(CGFloat(0), CGFloat(0), CGFloat(nextButtonWidth), CGFloat(h)))
prevButton.setTitle("<", forState: UIControlState.Normal)
prevButton.setTitleColor(UIColor.blackColor(), forState: UIControlState.Normal)
self.addSubview(prevButton)
nextButton = initButton(CGRectMake(CGFloat(nextButtonWidth+w), CGFloat(0), CGFloat(nextButtonWidth), CGFloat(h)))
nextButton.setTitle(">", forState: UIControlState.Normal)
nextButton.setTitleColor(UIColor.blackColor(), forState: UIControlState.Normal)
self.addSubview(nextButton)
self.backgroundColor = UIColor.whiteColor()
}
func initEven() {
prevButton.addTarget(self, action: "prevBtnClick:", forControlEvents: UIControlEvents.TouchUpInside)
nextButton.addTarget(self, action: "nextBtnClick:", forControlEvents: UIControlEvents.TouchUpInside)
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
func initButton(frame: CGRect)->UIButton {
let button:UIButton = UIButton(frame: frame)
button.backgroundColor = UIColor.redColor()
return button
}
func prevBtnClick(sender:AnyObject) {
let btn: UIButton = sender as! UIButton
if (currentPageNum > 1) {
oldPageNum = currentPageNum
currentPageNum = currentPageNum-1;
pageScrollView.setColor(oldPageNum, color: pageScrollView.normalColor)
pageScrollView.setColor(currentPageNum, color: pageScrollView.currentColor)
prevBtnCallback!(page: currentPageNum)
self.moveToCenterByPageNum(currentPageNum)
}
}
func nextBtnClick(sender:AnyObject) {
let btn: UIButton = sender as! UIButton
if (currentPageNum < pageScrollViewPageSize) {
oldPageNum = currentPageNum
currentPageNum = currentPageNum+1;
pageScrollView.setColor(oldPageNum, color: pageScrollView.normalColor)
pageScrollView.setColor(currentPageNum, color: pageScrollView.currentColor)
nextBtnCallback!(page: currentPageNum)
self.moveToCenterByPageNum(currentPageNum)
}
}
func moveToCenterByPageNum(currentPageNum:Int)->Void {
let halfWidth = CGFloat(pageScrollView.frame.width/2)
let tempWidth = CGFloat(currentPageNum * (pageScrollViewPageNumWidth + pageScrollViewPageNumSpacing) - (pageScrollViewPageNumWidth + pageScrollViewPageNumSpacing)/2)
var newX = tempWidth - halfWidth
if (newX > 0 && pageScrollView.contentSize.width > self.frame.width){
if ((pageScrollView.contentSize.width - tempWidth) >= halfWidth) {
pageScrollView.setContentOffset(CGPointMake(newX, 0), animated: true)
} else {
newX = pageScrollView.contentSize.width-pageScrollView.frame.width
pageScrollView.setContentOffset(CGPointMake(newX, 0), animated: true)
}
} else {
pageScrollView.setContentOffset(CGPointMake(0, 0), animated: true)
}
}
}
//
// PageView.swift
// PhotoDemo
//
// Created by qings on 16/1/24.
// Copyright © 2016年 pukaila. All rights reserved.
//
import Foundation
import UIKit
class PageScrollView : UIScrollView {
var screenObject:CGRect=UIScreen.mainScreen().bounds;
var pageSize : Int!
var pageHeight: Int!
var pageWidth: Int!
var spacing: Int!
var currentPageNum: Int!
var callback:((page:Int)->(Void))!
var currentColor:UIColor = UIColor.orangeColor()
var normalColor:UIColor = UIColor.greenColor()
func getPageNum(i:Int)->UIView {
let pageNumView : UIView = UIView()
let x:CGFloat = CGFloat((i-1) * pageWidth) + CGFloat((i-1)*spacing)
let y:CGFloat = 0
let width:CGFloat = CGFloat(pageWidth)
let height:CGFloat = CGFloat(pageHeight)
pageNumView.frame = CGRectMake(x, y, width, height)
pageNumView.backgroundColor = normalColor
let label:UILabel = UILabel(frame: CGRectMake(0, 0, width, height))
label.text = String(i)
label.textAlignment = NSTextAlignment.Center
let tap:UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: "pageNumClick:")
pageNumView.addGestureRecognizer(tap)
pageNumView.tag = i
pageNumView.addSubview(label)
return pageNumView
}
func pageNumClick(sender:AnyObject){
let tap:UITapGestureRecognizer = sender as! UITapGestureRecognizer
callback(page: sender.view!!.tag)
}
func setColor(page:Int, color:UIColor)->Void {
self.subviews[page-1].backgroundColor = color
}
override init(frame: CGRect) {
super.init(frame:frame)
}
func addPageNumItem() {
let width = (self.pageWidth+spacing)*self.pageSize - spacing
let height = self.pageHeight
self.contentSize=CGSizeMake(CGFloat(width), CGFloat(height))
for index in 1...self.pageSize {
self.addSubview(getPageNum(index))
}
self.setColor(self.currentPageNum, color: currentColor)
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
}
调用
//
// ViewController.swift
// PageViewDemo
//
// Created by qings on 16/1/24.
// Copyright © 2016年 pukaila. All rights reserved.
//
import UIKit
class ViewController: UIViewController {
var screenObject:CGRect=UIScreen.mainScreen().bounds
var label:UILabel!
override func viewDidLoad() {
super.viewDidLoad()
intView()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func intView() {
createPageView()
createContentView()
}
func createContentView() {
label = UILabel(frame: CGRectZero)
label.text = "1"
label.font = UIFont(name: "AmericanTypewriter-Bold", size: CGFloat(120))
label.textAlignment = NSTextAlignment.Center
self.view.addSubview(label)
label.translatesAutoresizingMaskIntoConstraints = false
let constraintX:NSLayoutConstraint = NSLayoutConstraint(
item: label, attribute: .CenterX, relatedBy: .Equal,
toItem: self.view, attribute: .CenterX, multiplier: 1.0, constant: 0.0)
self.view.addConstraint(constraintX)
let constraintY:NSLayoutConstraint = NSLayoutConstraint(
item: label, attribute: .CenterY, relatedBy: .Equal,
toItem: self.view, attribute: .CenterY, multiplier: 1.0, constant: 0.0)
self.view.addConstraint(constraintY)
}
func createPageView() {
let height = 40
let width = screenObject.width
let x = 0
let y = screenObject.height - CGFloat(height)
let pageView : PageView = PageView(frame: CGRectMake(CGFloat(x), CGFloat(y), CGFloat(width), CGFloat(height)))
pageView.currentPageNum = 1
pageView.pageScrollViewPageSize = 6
pageView.pageScrollViewPageNumHeight = 40
pageView.pageScrollViewPageNumWidth = 40
pageView.pageScrollViewPageNumSpacing = 1
pageView.nextButtonWidth = 44
pageView.prevButtonWidth = 44
pageView.doInit()
pageView.callback={(page)->Void in
self.updatePage(page)
}
pageView.prevBtnCallback={(page)->Void in
self.updatePage(page)
}
pageView.nextBtnCallback={(page)->Void in
self.updatePage(page)
}
self.view.addSubview(pageView)
}
func updatePage(page:Int)->Void {
self.label.text = String(page)
}
}