ScrollView AD Carousel

<span style= "color: #33ccff;" >////carouselsrollview.m//carouselscrollerview////Created by Xiaoyao on 15/1/12.//Copyright (c) 2015 Lijien. All rights reserved.//#import "CarouselSrollView.h" #import "uiimageview+webcache.h" #define Kscrolltimerinterval 5.0@     Interface Carouselsrollview () <UIScrollViewDelegate> {Uiscrollview *_carouselscrollew;         Scrolling view Uipagecontrol *_pagecontrol;               Control paging Nsarray *_imagesarray;   Store all picture objects Nsmutablearray *_currentpagearray;              Holds the current scrolling three-page picture object Nsuinteger _totalpage;            Total pages Nsuinteger _currentpage; Current page number CGRect _scrollviewframe;} @property (nonatomic, strong) Nstimer *timer; @end @implementation carouselsrollview-(instancetype) initWithFrame: (  CGRect) frame {self = [super Initwithframe:frame];    if (self) {_imagesarray = [[Nsarray alloc] init];    _currentpagearray = [[Nsmutablearray alloc] init];    _scrollviewframe = frame; _carouselscrollew = [[Uiscrollview alloc] InitwithfRame:_scrollviewframe];    _carouselscrollew.backgroundcolor = [Uicolor Clearcolor];    _carouselscrollew.showshorizontalscrollindicator = NO;    _carouselscrollew.showsverticalscrollindicator = NO;    _carouselscrollew.pagingenabled = YES;    _carouselscrollew.delegate = self; Nsuinteger count = _imagesarray.count >= 3?    3: _imagesarray.count;                                               _carouselscrollew.contentsize = Cgsizemake (Count * _scrollviewframe.size.width,    _scrollviewframe.size.height);        [Self addsubview:_carouselscrollew];    cgfloat px = (self.frame.size.width-28)/2;    CGFloat py = self.frame.size.height-28;    CGFloat pw = 28;    CGFloat ph = 28;    _pagecontrol = [[Uipagecontrol alloc] initwithframe:cgrectmake (px, py, PW, ph)];    _pagecontrol.pageindicatortintcolor = [Uicolor Whitecolor];    _pagecontrol.currentpageindicatortintcolor = [Uicolor Graycolor];    _currentpage = 1;    _totalpage = _imagesarray.count; _pagecontrol.currentpage = _curRentpage;    _pagecontrol.numberofpages = _totalpage;        [Self Addsubview:_pagecontrol];  [Self opentimer]; } return self;} -(void) Starttimer {[Self.timer setfiredate:[nsdate distantpast];} -(void) Stoptimer {[Self.timer setfiredate:[nsdate distantfuture];}  -(void) Opentimer {//) destroy the previous timer before each boot [self.timer invalidate];  Self.timer = nil; Self.timer = [Nstimer scheduledtimerwithtimeinterval:kscrolltimerinterval t                                              Arget:self selector: @selector (Autoscrolltonext) Userinfo:nil Repeats:yes];}  #pragma mark-timer call scrolls to the next page-(void) Autoscrolltonext {_currentpage = [self vaildpage:_currentpage + 1]; return;} /** * @brief Get the currently valid page number * @author Lijien * @date 2014-01-13 */-(Nsuinteger) Vaildpage: (Nsinteger) Valuepage {if (value  Page = = 0) {valuepage = _totalpage; } else {valuepage = _totalpage+ 1;  Valuepage = 1; } return valuepage;} -(void) Setimagepaths: (Nsarray *) Imagepatharray {if (_imagesarray = = nil) {_imagesarray = [[Nsarray alloc] Initwitha  Rray:imagepatharray];  } else {_imagesarray = [Nsarray Arraywitharray:imagepatharray];  } _currentpage = 1;  _totalpage = _imagesarray.count;  _pagecontrol.currentpage = _currentpage;  _pagecontrol.numberofpages = _totalpage;  _pagecontrol.hidesforsinglepage = YES; Only one item is hidden, the default is no nsuinteger count = _imagesarray.count >= 3?  3: _imagesarray.count;                                             _carouselscrollew.contentsize = Cgsizemake (Count * _scrollviewframe.size.width,    _scrollviewframe.size.height);  [Self opentimer]; return;} /** * @brief Refresh scrolling View * @author Lijien * @date 2014-01-13 */-(void) Refreshscrolview {[Self Displayimagewithcurrentima  Ge:_currentpage];  for (Nsuinteger index = 0; index < _currentpagearray.count; index++) {Uiimageview *imageview = [[Uiimageview alloc] Initwithframe:_Scrollviewframe];    Imageview.frame = Cgrectoffset (_scrollviewframe, _scrollviewframe.size.width * index, 0);    NSString *imgurl = [_currentpagearray objectatindex:index]; if (imgurl! = nil) {[ImageView sd_setimagewithurl:[nsurl Urlwithstring:imgurl] Placeholderimage:[u    IImage imagenamed:@ "AAA"];    } imageview.userinteractionenabled = YES;                                                                          UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] Initwithtarget:self    Action: @selector (imageviewtapclicked:)];    [ImageView Addgesturerecognizer:tap];  [_carouselscrollew Addsubview:imageview];  } [_carouselscrollew Setcontentoffset:cgpointmake (_scrollviewframe.size.width, 0)]; if ([Self.delegate respondstoselector: @selector (carscrollview:didscrollimagetoindex:)]) {[self.delegate  Carscrollview:_carouselscrollew Didscrollimagetoindex:_currentpage]; }}-(void) imageviewtapclicked: (Uigesturerecognizer *) Tap {}/** * @brief The current three images are stored according to the current page * @author Lijien * @date 2014-01-13 */-(Nsarray *) Displayimagewithcurrentimage: (Nsuinteger)  Page {Nsuinteger previouspage = [self vaildpage:currentpage-1];    Nsuinteger nextPage = [self vaildpage:currentpage + 1];  if (_currentpagearray.count! = 0) {[_currentpagearray removeallobjects]; } if (PreviousPage-1 < _imagesarray.count) {[_currentpagearray Addobject:[_imagesarray Objectatindex:previousp  AGE-1]]; } if (CurrentPage-1 < _imagesarray.count) {[_currentpagearray Addobject:[_imagesarray Objectatindex:currentpag  E-1]]; } if (NextPage-1 < _imagesarray.count) {[_currentpagearray Addobject:[_imagesarray objectatindex:nextpage-1]  ]; } return _currentpagearray;} #pragma mark-scrollviewdlelegate-(void) Scrollviewdidscroll: (Uiscrollview *) ScrollView {if (    Scrollview.contentoffset.x >= 2 * _scrollviewframe.size.width) {_currentpage = [self vaildpage:_currentpage + 1];    [Self refreshscrolview]; If ([Self.delegate respondstoselector: @selector (carscrollview:didscrollimagetoindex:)]) {[self.delegate    Carscrollview:_carouselscrollew Didscrollimagetoindex:_currentpage];    }} if (scrollview.contentoffset.x <= 0) {_currentpage = [self vaildpage:_currentpage-1];    [Self refreshscrolview]; if ([Self.delegate respondstoselector: @selector (carscrollview:didscrollimagetoindex:)]) {[self.delegate    Carscrollview:_carouselscrollew Didscrollimagetoindex:_currentpage]; }} return; -(void) scrollviewdidenddecelerating: (Uiscrollview *) ScrollView {[ScrollView Setcontentoffset:cgpointmake (_    ScrollViewFrame.size.width, 0)];  Enable the timer again if (Self.timer = = nil) {[Self opentimer]; }}-(void) scrollviewwillbegindragging: (Uiscrollview *) ScrollView {//before being dragged before the timer object is destroyed if (Self.timer) {[_timer inval    Idate];  _timer = nil; } return; @end </span>

ScrollView AD Carousel