Uiscrollview Reality Cycle scrolling

1 #import "RootViewController.h"2 3 #definewidth [UIScreen mainscreen].bounds.size.width4 #defineHeigthy 1505 6 @interfaceRootviewcontroller () <UIScrollViewDelegate>7 {8Uiscrollview *_scrollview;9Nsmutablearray *Imagearray;TenUipagecontrol *Pagecontrol; One } A @end -  - @implementationRootviewcontroller the  -- (void) Dealloc - { -Imagearray =Nil; + [Super Dealloc]; - } +  A- (void) Loadview at { - [Super Loadview]; -_scrollview = [[Uiscrollview alloc] Initwithframe:cgrectmake (0,0, Width, heigthy)]; -_scrollview.pagingenabled =YES; -_scrollview.Delegate=Self ; -     //start by selecting the layout of the second picture picture [3-1-2-3-1] in_scrollview.contentoffset = Cgpointmake (width,0); -     //Hide horizontal scroll bar to_scrollview.showshorizontalscrollindicator =NO; +      -Pagecontrol = [[Uipagecontrol alloc] initwithframe:cgrectmake (Width- -, Heigthy- -, -, -)]; the     //setting Pagecontrol does not support user action *pagecontrol.userinteractionenabled =NO; $Pagecontrol.currentpageindicatortintcolor =[Uicolor Redcolor];Panax NotoginsengPagecontrol.pageindicatortintcolor =[Uicolor Greencolor]; - [Self.view Addsubview:_scrollview]; the [Self.view Addsubview:pagecontrol]; + [_scrollview release]; A [Pagecontrol release]; the      + } -  $- (void) Viewdidload { $ [Super Viewdidload]; -Imagearray =[[Nsmutablearray alloc] init]; -Nsarray *temparray = @[@"1-3.jpg",@"1-1.jpg",@"1-2.jpg",@"1-3.jpg",@"1-1.jpg"]; the [Imagearray Addobjectsfromarray:temparray]; -     //set the content size of the _scrollview based on the number of ImagearrayWuyi_scrollview.contentsize = Cgsizemake (Width *Imagearray.count, heigthy); thePagecontrol.numberofpages = Imagearray.count-2; -     //add a picture to _scrollview Wu [self addimageswithscrollview]; - } About  $ /** - * Add pictures to ScrollView -  */ -- (void) Addimageswithscrollview A { +      for(inti =0; i < Imagearray.count; i++) { theUiimageview *imageview =[[Uiimageview alloc] initwithimage:[uiimage imagenamed:imagearray[i]]; -Imageview.frame = CGRectMake (i * width,0, width, heigthy); $ [_scrollview Addsubview:imageview]; the [ImageView release]; the     } the } the  - #pragmaMethods of Mark-uiscrollviewdelegate in- (void) Scrollviewdidenddecelerating: (Uiscrollview *) ScrollView the { the     intImageIndex = scrollview.contentoffset.x/width; About     if(ImageIndex = =0) { the         //when you scroll to the first picture, jump to the penultimate picture the[_scrollview Scrollrecttovisible:cgrectmake (Imagearray.count-2) *width,0, Width, heigthy) animated:no]; the}Else if(ImageIndex = = Imagearray.count-1){ +         //when you scroll to the last picture, jump to the second picture -[_scrollview scrollrecttovisible:cgrectmake (width,0, Width, heigthy) animated:no]; the     }Bayi } the  the /** - * Set the current page of Pagecontrol -  */ the- (void) Scrollviewdidscroll: (Uiscrollview *) ScrollView the { the     //Plus 0.5 is for the user experience is better, the sliding process which picture is dominant to show the picture of the corresponding subscript the     intImageIndex = Scrollview.contentoffset.x/width +0.5; -     if(ImageIndex = =0) { the         //set the appropriate subscript (minus 1 to correspond to the subscript of the Pagecontrol) theImageIndex = Imagearray.count-1; the}Else if(ImageIndex = = Imagearray.count-1){94         //set the appropriate subscript (minus 1 to correspond to the subscript of the Pagecontrol) theImageIndex =1; the     } thePagecontrol.currentpage = ImageIndex-1;98 } About @end

Uiscrollview Reality Cycle scrolling