ios--Carousel Diagram Implementation

- (void) viewdidload {[Super viewdidload]; /** * Carousel Chart * * @return Nil*/    //Image ArrayImagearr = @[@"Scroll.png",@"Record.png",@"State2.png"]; //scrollview width and heightScrollWidth = ScreenWidth- -; ScrollHeight= (homeviewheight-5)*0.3; //set the contentsize size of the ScrollView, if the contentsize tall in the high ScrollView will appear up and down drag phenomenon, generally set to equal or 0Scrollview.contentsize = Cgsizemake (scrollwidth* (self.imagearr.count+2), scrollheight); //default starts from first page[ScrollView Setcontentoffset:cgpointmake (0,0)]; [ScrollView Scrollrecttovisible:cgrectmake (ScrollWidth,0, ScrollWidth, scrollheight) Animated:no]; ScrollView.Delegate=Self ; //number of points in the PagecontrolPagecontrol.numberofpages =Self.imageArr.count; //start from the first pagePagecontrol.currentpage =0; //Carousel[Pagecontrol addtarget:self Action: @selector (Turnpage) forcontrolevents:uicontroleventvaluechanged]; //Add a picture     for(inti =0; i < Imagearr.count; i + +) {Uiimageview*imageview = [[Uiimageview alloc] Initwithframe:cgrectmake (Scrollwidth*i+scrollwidth,0, ScrollWidth, scrollheight)]; Imageview.image=[UIImage Imagenamed:imagearr[i]]; Imageview.userinteractionenabled=YES;    [ScrollView Addsubview:imageview]; }    //take the last picture on page No. 0Uiimageview *firstimageview = [[Uiimageview alloc] Initwithframe:cgrectmake (0,0, ScrollWidth, scrollheight)]; Firstimageview.image=[UIImage Imagenamed:[imagearr lastobject];    [ScrollView Addsubview:firstimageview]; //take the first picture on the last pageUiimageview *lastimageview = [[Uiimageview alloc] Initwithframe:cgrectmake (scrollwidth* (imagearr.count+1),0, ScrollWidth, scrollheight)]; Lastimageview.image=[UIImage Imagenamed:[self.imagearr firstobject];        [ScrollView Addsubview:lastimageview]; //Timer Loop Playback[self addtimer]; }#pragmaMark--------Carousel Implementation, Uipagecontrol controls automatic carousel----(void) turnpage {Nsinteger page= Pagecontrol.currentpage;//Gets the current page[ScrollView Scrollrecttovisible:cgrectmake (scrollwidth* (page+1),0, Scrollwidth,scrollheight) Animated:no];//Touch Pagecontroller that point and turn back one page +1}- (void) runtimepage {Nsinteger page= Pagecontrol.currentpage;//Gets the current pagepage++; Page= page > (Imagearr.count-1) ?0: page; Pagecontrol.currentpage=page; [Self turnpage];}- (void) AddTimer {Self.mytimer= [Nstimer scheduledtimerwithtimeinterval:2target:self selector: @selector (runtimepage) Userinfo:nil repeats:yes];}#pragmaMark---Uiscrollview proxy method to ensure manual swipe-(void) Scrollviewwillbegindragging: (Uiscrollview *) ScrollView {//turn off the timer to avoid collision with manual sliding[Self.mytimer invalidate];}- (void) Scrollviewdidenddragging: (Uiscrollview *) ScrollView willdecelerate: (BOOL) decelerate{//when the manual slide is finished, turn on the timer[self addtimer];}- (void) Scrollviewdidscroll: (Uiscrollview *) ScrollView {cgfloat pagewidth=ScrollWidth; Nsinteger page= Floor ((scrollview.contentoffset.x-pagewidth/([Imagearr count]+2))/pagewidth) +1; Page--;//default starts from second pagePagecontrol.currentpage =page; }- (void) Scrollviewdidenddecelerating: (Uiscrollview *) ScrollView {cgfloat pagewidth=ScrollWidth; Nsinteger currentpage= Floor ((scrollview.contentoffset.x-pagewidth/([Imagearr count]+2))/PageWidth) +1; if(currentpage==0) {[ScrollView scrollrecttovisible:cgrectmake (ScrollWidth* [Imagearr Count],0, Scrollwidth,scrollheight) Animated:no];//serial 0 last 1 page    }    Else if(currentpage== ([Imagearr count]+1) {[ScrollView scrollrecttovisible:cgrectmake (ScrollWidth,0, Scrollwidth,scrollheight) Animated:no];//the last +1, the 1th page of the cycle    }    }

ios--Carousel Diagram Implementation