Ios_8_scrollview Sub-page

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BeyondViewController.h

  beyondviewcontroller.h//  8_scrollview pagination Browse////  Created by Beyond on 14-7-25.//  Copyright (c) 2014 Com.beyond. All rights reserved.//#import <UIKit/UIKit.h> @interface beyondviewcontroller:uiviewcontroller@property (Weak, nonatomic) Iboutlet Uiscrollview *scrollview; @end

BeyondViewCon TROLLER.M

beyondviewcontroller.m//8_scrollview Page View/* The following code has performance issues, only as a new feature introduction interface using not as a picture browser ~ 1, one-time generation of 8 ImageView there will be performance problems, the solution Method: Use 3 ImageView (or 2 ImageView) 2, in addition, loop playback has not implemented *///Created by beyond on 14-7-25.//Copyright (c) 2014 Com.beyond. All rights reserved.//#import "BeyondViewController.h"//Picture Total number # define Kimgcount 8@interface Beyondviewcontroller () <uiscrollviewdelegate>{//Pagination bar code indicator Controller Uipagecontrol *_pagecontrol;} @end @implementation beyondviewcontroller-(void) viewdidload{[Super viewdidload];//Call custom method [self scrollviewwithpage ];} scrollview-with paging function (void) scrollviewwithpage{//1, setting the visual size of the ScrollView, content size, etc properties _scrollview.frame = Self.view.bou    Nds    _scrollview.showshorizontalscrollindicator = NO;    _scrollview.showsverticalscrollindicator = NO;    _scrollview.bounceszoom = NO;    _scrollview.bounces = NO;        Set the code to listen for the scrolled event _scrollview.delegate = self; 2, create 8 Uiimageview, add to ScrollView//each picture is wide, high cgfloat IMGW = self.view.bounds.size.Width    CGFloat imgh = self.view.bounds.size.height; for (int i=0; i<kimgcount; i++) {//Uiimageview//Picture name: 01.jpg ~ 07.jpg nsstring *imgname = [nsstr        ing stringwithformat:@ "0%d.png", i+1];        Uiimageview *imgview = [[Uiimageview alloc]initwithimage:[uiimage Imagenamed:imgname]];        If the image inside the ImageView is not deformed//set the following two properties of the Uiimageview object, the picture can be filled without deforming and filling the picture frame as a precondition.        Imgview.clipstobounds = YES;        Imgview.contentmode = Uiviewcontentmodescaleaspectfill;       Y is a 0,x is a attached imgview.frame = CGRectMake (I*IMGW, 0, IMGW, IMGH);    Add all the pictures to ScrollView [_scrollview Addsubview:imgview];    }//3, the most important, is the scrolling area//_scrollview.contentsize = Cgsizemake (KIMGCOUNT*IMGW, IMGH);    0 stands for Height direction not scrolling _scrollview.contentsize = Cgsizemake (KIMGCOUNT*IMGW, 0);            Press ScrollView the width of the page _scrollview.pagingenabled = YES;    4,pagecontrol Paging Indicator Bar _pagecontrol = [[Uipagecontrol alloc]init]; Pagecontrol The center point of the pagination indicator bar in the middle of the bottom _Pagecontrol.numberofpages = Kimgcount;    This most important _pagecontrol.center = Cgpointmake (imgw*0.5, imgH-20);    _pagecontrol.bounds = CGRectMake (0, 0, 150, 15);    _pagecontrol.pageindicatortintcolor = [Uicolor Graycolor];    _pagecontrol.currentpageindicatortintcolor = [Uicolor Redcolor]; _pagecontrol.enabled = NO;    Cancels its default click behavior [Self.view Addsubview:_pagecontrol]; }/* in this method, can be performance optimization, because constantly in the monitoring of scrolling, so at any time to do 3 uiimageview splicing, or even reduced to only 2 Uiimageview for dynamic splicing */-(void) Scrollviewdidscroll: ( Uiscrollview *) scrollview{//ScrollView Contentoffset is the most important attribute, the point, X, y record is the distance of the scroll, relative to the ScrollView visual interface of the upper left corner of the distance cgpoint off    set = Scrollview.contentoffset;    int Curpageno = offset.x/_scrollview.bounds.size.width;    _pagecontrol.currentpage = Curpageno; } @end