Swift_ScrollVoew&&PageControl

来源：互联网发布：海思自动对焦算法编辑：程序博客网时间：2024/05/17 01:20

// ViewController.swift

// Swift_ScrollView

// Created by HarrySun on 16/7/19.

import UIKit

class ViewController:UIViewController,UIScrollViewDelegate {

let numOfPages =3

let pageWidth =414

let pageHeight =600

var scrollView =UIScrollView()

var pageControl =UIPageControl()

overridefunc viewDidLoad(){

super.viewDidLoad()

//scrollView的初始化

scrollView.frame =self.view.bounds

//为了让内容横向滚动，设置横向内容宽度为3个页面的宽度总和

scrollView.contentSize=CGSizeMake(CGFloat(pageWidth*numOfPages),

CGFloat(pageHeight))

scrollView.pagingEnabled =true

scrollView.showsHorizontalScrollIndicator =false

scrollView.showsVerticalScrollIndicator =false

scrollView.scrollsToTop =false

scrollView.minimumZoomScale=0.1//最小比例

scrollView.maximumZoomScale=3//最大比例

scrollView.bouncesZoom =false

scrollView.delegate=self

//添加子页面(子页面在博客下方。)

for iin 0..<numOfPages{

let myViewController =MyViewController(number:(i+1))

myViewController.view.frame =CGRectMake(CGFloat(pageWidth*i),

CGFloat(0),CGFloat(pageWidth),CGFloat(pageHeight))

let imageView =UIImageView()

imageView.frame =CGRectMake(0,0,CGFloat(pageWidth),CGFloat(pageHeight))

imageView.image =UIImage(named: "1.jpg")

imageView.userInteractionEnabled =true

imageView.tag = i +100

myViewController.view .addSubview(imageView)

scrollView.addSubview(myViewController.view)

}

self.view.addSubview(scrollView)

pageControl.frame =CGRectMake(CGFloat(pageWidth /2 - 50),CGFloat(pageHeight -50), CGFloat(100),CGFloat(40))

pageControl.backgroundColor =UIColor.redColor();

pageControl.numberOfPages =numOfPages

pageControl.currentPage =0

pageControl.addTarget(self, action:#selector(pageChanged(_:)), forControlEvents:UIControlEvents.ValueChanged)// 设置点击事件

self.view.addSubview(pageControl)

}

overridefunc didReceiveMemoryWarning() {

super.didReceiveMemoryWarning()

// Dispose of any resources that can be recreated.

}

//UIScrollViewDelegate方法，每次滚动结束后调用

func scrollViewDidEndDecelerating(scrollView:UIScrollView) {

print("停止滑动")

//通过scrollView内容的偏移计算当前显示的是第几页

let page =Int(scrollView.contentOffset.x / scrollView.frame.size.width)

//设置pageController的当前页

pageControl.currentPage = page

}

func scrollViewDidScroll(scrollView:UIScrollView) {

print("滑动中")

}

func scrollViewDidEndDragging(scrollView:UIScrollView, willDecelerate decelerate:Bool) {

print("停止拖拽")

}

//点击页控件时事件处理

func pageChanged(sender:UIPageControl) {

//根据点击的页数，计算scrollView需要显示的偏移量

var frame =scrollView.frame

frame.origin.x = frame.size.width * CGFloat(sender.currentPage)

frame.origin.y =0

//展现当前页面内容

scrollView.scrollRectToVisible(frame, animated:true)

}

func viewForZoomingInScrollView(scrollView:UIScrollView) -> UIView? {

returnself.view.viewWithTag(101)

}

func scrollViewWillBeginDragging(scrollView:UIScrollView) {

print("开始拖拽视图")

}

func scrollViewWillBeginDecelerating(scrollView:UIScrollView) {

print("将开始降速时")

}

func scrollViewDidEndScrollingAnimation(scrollView:UIScrollView) {

print("滚动动画停止时执行,代码改变时触发,也就是setContentOffset改变时")

}

func scrollViewDidEndZooming(scrollView:UIScrollView, withView view:UIView?, atScale scale: CGFloat) {

print("完成放大缩小时调用")

}

-------------------------------------------------------------------------------------------------------------

// MyViewController.swift

// Swift

// Created by HarrySun on 16/7/19.

import UIKit

class MyViewController: UIViewController {

var number:Int!

let colorMap = [

1:UIColor.blackColor(),

2:UIColor.orangeColor(),

3:UIColor.blueColor()

]

init(number initNumber:Int){

self.number = initNumber

super.init(nibName:nil, bundle: nil)

}

requiredinit?(coder aDecoder: NSCoder) {

fatalError("init(coder:) has not been implemented")

}

overridefunc viewDidLoad(){

let numberLabel =UILabel(frame:CGRectMake(130,50,50,30))

numberLabel.text ="第\(number)页"

numberLabel.textColor =UIColor.whiteColor()

self.view.addSubview(numberLabel)

self.view.backgroundColor =colorMap[number]

}

0 0