Only the first time you enter the navigation view and the first navigation View

Only the first time you enter the navigation view and the first navigation View

Only when the program is run for the first time can the program be deleted and re-run.

I only show the last image.

 

First create a viewcontroller class

Set the Root View in APPDelegate.

Then

Write in UseGuideViewController. h

FirstViewController is my main interface.

Macro definition width and height

#import <UIKit/UIKit.h>#import "FirstViewController.h"#define WIDTH  self.view.frame.size.width#define HEIGHT self.view.frame.size.height@interface UseGuideViewController : UIViewController<UIScrollViewDelegate>@end

The following is the code in UseGuideViewController. m, which has some comments.

 

# Import "UseGuideViewController. h "@ interface UseGuideViewController () @ end @ implementation UseGuideViewController-(void) viewDidLoad {[super viewDidLoad]; [self initGuide];}-(void) didreceivemorywarning {[super busy]; // Dispose of any resources that can be recreated .} -(void) initGuide {UIScrollView * scrollView = [[UIScrollView alloc] initWithFrame: CGRectMake (0, 0, WIDTH, HEIGHT)]; [scrollView setContentSize: CGSizeMake (WIDTH * 4, 0)]; [scrollView setPagingEnabled: YES]; // View display on the entire page // [scrollView setBounces: NO]; // avoid the bounce effect and expose the Root View to scrollView. delegate = self; UIImageView * imageview = [[UIImageView alloc] initWithFrame: CGRectMake (0, 0, WIDTH, HEIGHT)]; [imageview setImage: [UIImage imageNamed: @ "5.png"]; [scrollView addSubview: imageview]; UIImageView * imageview1 = [[UIImageView alloc] initWithFrame: CGRectMake (WIDTH, 0, WIDTH, HEIGHT)]; [imageview1 setImage: [UIImage imageNamed: @ "004.png"]; [scrollView addSubview: imageview1]; UIImageView * imageview2 = [[UIImageView alloc] initWithFrame: CGRectMake (WIDTH * 2, 0, WIDTH, HEIGHT)]; [imageview2 setImage: [UIImage imageNamed: @ "006.png"]; [scrollView addSubview: imageview2]; UIImageView * imageview3 = [[UIImageView alloc] initWithFrame: CGRectMake (WIDTH * 3, 0, WIDTH, HEIGHT)]; [imageview3 setImage: [UIImage imageNamed: @ "0.png"]; imageview3.userInteractionEnabled = YES; // enable user interaction of imageview3; otherwise, the following button cannot respond to [scrollView addSubview: imageview3]; UIButton * button = [UIButton buttonWithType: UIButtonTypeCustom]; // load a transparent button [button setTitle: nil forState: UIControlStateNormal]; [button setFrame: CGRectMake (250, 20,150, 40)]; [button addTarget: self action: @ selector (firstpressed) forControlEvents: UIControlEventTouchUpInside]; [button setTitle: @ "go to the main interface" forState: 0]; [button setTitleColor: [UIColor colorWithRed: 0.305 green: 1.000 blue: 0.901 alpha: 1.000] forState: 0]; [imageview3 addSubview: button]; [self. view addSubview: scrollView];}-(void) firstpressed {FirstViewController * firstvc = [FirstViewController new]; [self presentViewController: firstvc animated: YES completion: ^ {NSLog (@ "the page has been switched. modal View ") ;}] ;}/ * # pragma mark-Navigation // In a storyboard-based application, you will often want to do a little preparation before navigation-(void) prepareForSegue :( UIStoryboardSegue *) segue sender :( id) sender {// Get the new view controller using [segue destinationViewController]. // Pass the selected object to the new view controller .} * // @ end

Well, this is my brief introduction. Maybe not mature, but I am working hard for it.