103 adding or removing the number of pages in a screen

The effect is as follows:

ViewController.h

1 #import <UIKit/UIKit.h>23@interface  viewcontroller: Uiviewcontroller4 @property (Strong, Nonatomic) Uipagecontrol *Pageccustom; 5 6 @end

Viewcontroller.m

1 #import "ViewController.h"2 3 @interfaceViewcontroller ()4- (void) Layoutui;5- (void) loadnavigation;6- (void) Pagecontroldidchange: (Uipagecontrol *) sender;7- (void) Adddidpush: (Uibarbuttonitem *) sender;8- (void) Deldidpush: (Uibarbuttonitem *) sender;9 @endTen  One @implementationViewcontroller A  -- (void) Viewdidload { - [Super Viewdidload]; the      - [self layoutui]; - } -  +- (void) didreceivememorywarning { - [Super didreceivememorywarning]; +     //Dispose of any resources the can be recreated. A } at  -- (void) Viewwillappear: (BOOL) Animated { - [Super viewwillappear:animated]; - [Self.navigationcontroller setnavigationbarhidden:no animated:animated]; - [Self.navigationcontroller settoolbarhidden:no animated:animated]; - } in  -- (void) Layoutui { to [self loadnavigation]; +      -_pageccustom = [[Uipagecontrol alloc] Initwithframe:cgrectmake (0,0, the, -)]; the_pageccustom.center =Self.view.center; *_pageccustom.backgroundcolor =[Uicolor Browncolor]; $_pageccustom.numberofpages =3;Panax Notoginseng_pageccustom.currentpage =0; - [_pageccustom addtarget:self the Action: @selector (pagecontroldidchange:) + forcontrolevents:uicontroleventvaluechanged]; A [Self.view Addsubview:_pageccustom]; the } +  -- (void) loadnavigation { $Self.navigationItem.title =@"Add or remove the number of pages in a screen"; $Self.view.backgroundColor =[Uicolor Whitecolor]; -Uibarbuttonitem *barbtnbaradd = -[[Uibarbuttonitem alloc] Initwithtitle:@"Add a new page" the Style:uibarbuttonitemstyledone - target:selfWuyi Action: @selector (Adddidpush:)]; theUibarbuttonitem *barbtndel = -[[Uibarbuttonitem alloc] Initwithtitle:@"Delete old page" Wu Style:uibarbuttonitemstyledone - target:self About Action: @selector (Deldidpush:)]; $ [self Settoolbaritems:@[barbtnbaradd, Barbtndel]]; - } -- (void) Pagecontroldidchange: (Uipagecontrol *) Sender { -Uialertview *alert = [[Uialertview alloc] Initwithtitle:@"Prompt Information" AMessage:[nsstring stringWithFormat:@"currentpage=%ld", (Long) Sender.currentpage] +                                                    Delegate: Self the Cancelbuttontitle:nil -Otherbuttontitles:@"Determine", nil]; $ [alert show]; the } the  the- (void) Adddidpush: (Uibarbuttonitem *) Sender { the     if(_pageccustom.numberofpages <Ten) { -_pageccustom.numberofpages++; in     } the } the  About- (void) Deldidpush: (Uibarbuttonitem *) Sender { the     if(_pageccustom.numberofpages >1) { the_pageccustom.numberofpages--; the [self pagecontroldidchange:_pageccustom]; +     } - } the Bayi @end

AppDelegate.h

1 #import <UIKit/UIKit.h>23@interface Appdelegate:uiresponder < Uiapplicationdelegate>4 @property (Strong, Nonatomic) UIWindow *window; 5 @property (Strong, Nonatomic) Uinavigationcontroller *Navigationcontroller; 6 7 @end

Appdelegate.m

1 #import "AppDelegate.h"2 #import "ViewController.h"3 4 @interfaceappdelegate ()5 @end6 7 @implementationappdelegate8 9-(BOOL) Application: (UIApplication *) application didfinishlaunchingwithoptions: (Nsdictionary *) launchoptions {Ten_window =[[UIWindow alloc] initwithframe:[[uiscreen mainscreen] bounds]; OneViewcontroller *viewcontroller =[[Viewcontroller alloc] init]; A_navigationcontroller =[[Uinavigationcontroller alloc] initwithrootviewcontroller:viewcontroller]; -_window.rootviewcontroller =_navigationcontroller; -     //[_window Addsubview:_navigationcontroller.view];//when _window.rootviewcontroller is associated, this sentence is optional the [_window makekeyandvisible]; -     returnYES; - } -  +- (void) Applicationwillresignactive: (UIApplication *) Application { - } +  A- (void) Applicationdidenterbackground: (UIApplication *) Application { at } -  -- (void) Applicationwillenterforeground: (UIApplication *) Application { - } -  -- (void) Applicationdidbecomeactive: (UIApplication *) Application { in } -  to- (void) Applicationwillterminate: (UIApplication *) Application { + } -  the @end

103 to add or remove the number of pages in the screen