ScrollView implementation of Cyclic carousel

1 #import "MassageViewController.h"2 @interfaceMassageviewcontroller () <UIScrollViewDelegate>3@property (nonatomic,strong) Uiscrollview *Picscrollview;4@property (nonatomic,strong) Uipagecontrol *picctr;5@property (nonatomic,strong) Nstimer *timer;6@property (nonatomic,strong) Nsmutablearray *Picarr;7@property (nonatomic,strong) Uiimageview *Picimageview;8@property (nonatomic,strong) Uiimageview *Lastimageview;9 @endTen  One @implementationMassageviewcontroller A-(Nsmutablearray *) picarr{ -     if(self.picarr==Nil) { -_picarr =[Nsmutablearray array]; the     } -     return_picarr; - } -  +-(void) viewdidload{ -Self.picarr =[self loadimagedata]; +Self. Picscrollview = [[Uiscrollview alloc]initwithframe:cgrectmake (0, Max, Self.view.frame.size.width, $)]; A_picscrollview.pagingenabled =YES; at_picscrollview.Delegate=Self ; -_picscrollview.showshorizontalscrollindicator =NO; -_picscrollview.tag = +; -_picscrollview.contentsize = Cgsizemake (self. Picscrollview.width * (_picarr.count),0); -      for(inti =0; i<_picarr.count; i++) { -CGFloat IMGX = Self.view.frame.size.width *i; inSelf. Picimageview = [[Uiimageview alloc]initwithframe:cgrectmake (IMGX,0, Self.view.frame.size.width, $)]; -_picimageview.image =[_picarr objectatindex:i]; to [_picscrollview Addsubview:_picimageview]; +     } -CGFloat imgx = cgrectgetwidth (self.view.frame) *_picarr.count; the_lastimageview = [[Uiimageview alloc]initwithframe:cgrectmake (IMGX,0, Self.view.frame.size.width, $)]; *_lastimageview.image = [_picarr objectatindex:0]; $ [_picscrollview Addsubview:_lastimageview];Panax Notoginseng      -      the [Self.view Addsubview:_picscrollview]; +Self. PICCTR = [[Uipagecontrol Alloc]initwithframe:cgrectmake (self. picscrollview.width- Max)/2, self. picscrollview.y+ $- +, Max, -)]; A_picctr.pageindicatortintcolor =[Uicolor Graycolor]; the_picctr.currentpageindicatortintcolor =[Uicolor Redcolor]; +_picctr.numberofpages =5; -_picctr.currentpage =0; $ [Self.view addsubview:_picctr]; $ [Self.view bringsubviewtofront:_picctr]; -      -Self.timer = [Nstimer scheduledtimerwithtimeinterval:1.0target:self selector: @selector (scrollimage) Userinfo:nil Repeats:yes]; the     //Modify the priority level as other controls -     //gets the current message loop objectWuyiNsrunloop *runloop =[Nsrunloop Currentrunloop]; the     //setting the priority level - [Runloop AddTimer:self.timer formode:nsrunloopcommonmodes]; Wu } -  About-(Nsmutablearray *) loadimagedata{//loading picture $Nsmutablearray *arr =[Nsmutablearray array]; -      for(inti =0; i<5; i++) {
In order to save memory, it is recommended to use the path to load, note the picture should not be placed inside the assets.xcassets, otherwise read -NSString *imgname = [NSString stringWithFormat:@"%02d.jpg", i+1];//note. jpg format, image format Unified -NSString *imgpath =[[NSBundle mainbundle]pathforresource:imgname Oftype:nil]; AUIImage *image =[UIImage Imagewithcontentsoffile:imgpath]; + [arr addobject:image]; the     } -     returnarr; $ } the  the-(uistatusbarstyle) preferredstatusbarstyle{ the     returnuistatusbarstylelightcontent; the } -  in-(void) Scrollviewwillbegindragging: (Uiscrollview *) scrollview{ the     //Stop Timer the [Self.timer invalidate]; AboutSelf.timer =Nil; the } the  the-(void) Scrollviewdidenddragging: (Uiscrollview *) ScrollView willdecelerate: (BOOL) decelerate{ +      -     //R If put in Didscroll inside, each auto play will call, we want to drag the finger to call, so put in here, each time dragged to the first few, white point lit theCGFloat OffsetX = self. Picscrollview.contentoffset.x + self. picscrollview.frame.size.width/2;Bayi     intindex = offsetx/Self . Picscrollview.width; the_picctr.currentpage =index; the  -     //re-enable timer -Self.timer = [Nstimer scheduledtimerwithtimeinterval:1.0target:self selector: @selector (scrollimage) Userinfo:nil Repeats:yes]; the     //Modify the priority level as other controls the     //gets the current message loop object theNsrunloop *runloop =[Nsrunloop Currentrunloop]; the     //setting the priority level - [Runloop AddTimer:self.timer formode:nsrunloopcommonmodes]; the } the  the-(void) scrollimage{94     //Add a ImageView behind the ScrollView, as in the first diagram.  the     floatOffsetX =_picscrollview.contentoffset.x; theOffsetX + =cgrectgetwidth (self.view.frame); the     if(OffsetX = = Cgrectgetwidth (self.view.frame) *_picarr.count) {98_picctr.currentpage =0; About}Else{ -_picctr.currentpage = offsetx/cgrectgetwidth (self.view.frame);101     }102     if(Offsetx>cgrectgetwidth (self.view.frame) *_picarr.count) {103         //Direct copy speed is fast and lastimageview, just like a loop.104_picscrollview.contentoffset= Cgpointmake (0,0); the_picctr.currentpage =1;106[_picscrollview Setcontentoffset:cgpointmake (Cgrectgetwidth (Self.view.frame),0) Animated:yes];107}Else{108[_picscrollview Setcontentoffset:cgpointmake (OffsetX,0) Animated:yes];109     } the }111 @end

ScrollView implementation of Cyclic carousel