程序启动视图

来源：互联网发布：家里的网络突然没网了编辑：程序博客网时间：2024/05/16 10:37

这个功能的重点就是在如何判断应用是第一次启动的. 其实很简单

我们只需要在一个类里面写好用户引导页面基本上都是使用UIScrollView 来实现,

新建一个继承于UIViewController的类命名为 UserGuideViewController ,

在UserGuideViewController.m 写

 1 - (void)viewDidLoad 2 { 3     [super viewDidLoad]; 4     // Do any additional setup after loading the view. 5     self.view.backgroundColor = [UIColor redColor]; 6      7     [self initGuide];   //加载新用户指导页面 8 } 9 10 - (void)initGuide11 {12     UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 320, 640)];13     [scrollView setContentSize:CGSizeMake(1280, 0)];14     [scrollView setPagingEnabled:YES];  //视图整页显示15     //    [scrollView setBounces:NO]; //避免弹跳效果,避免把根视图露出来16     17     UIImageView *imageview = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 320, 460)];18     [imageview setImage:[UIImage imageNamed:@"0.png"]];19     [scrollView addSubview:imageview];20     [imageview release];21     22     UIImageView *imageview1 = [[UIImageView alloc] initWithFrame:CGRectMake(320, 0, 320, 460)];23     [imageview1 setImage:[UIImage imageNamed:@"1.png"]];24     [scrollView addSubview:imageview1];25     [imageview1 release];26     27     UIImageView *imageview2 = [[UIImageView alloc] initWithFrame:CGRectMake(640, 0, 320, 460)];28     [imageview2 setImage:[UIImage imageNamed:@"2.png"]];29     [scrollView addSubview:imageview2];30     [imageview2 release];31     32     UIImageView *imageview3 = [[UIImageView alloc] initWithFrame:CGRectMake(960, 0, 320, 460)];33     [imageview3 setImage:[UIImage imageNamed:@"3.png"]];34     imageview3.userInteractionEnabled = YES;    //打开imageview3的用户交互;否则下面的button无法响应35     [scrollView addSubview:imageview3];36     [imageview3 release];37     38     UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];//在imageview3上加载一个透明的button39     [button setTitle:nil forState:UIControlStateNormal];40     [button setFrame:CGRectMake(46, 371, 230, 37)];41     [button addTarget:self action:@selector(firstpressed) forControlEvents:UIControlEventTouchUpInside];42     [imageview3 addSubview:button];43     44     [self.view addSubview:scrollView];45     [scrollView release];46 }

button的方法

1 - (void)firstpressed2 {3     [self presentModalViewController:[[[WeiBoViewController alloc] init] autorelease] animated:YES];  //点击button跳转到根视图4 }

至于添加button是因为我的用户引导最后一个页面有一个画上去的button,写着开始使用我在上面添加一个透明的button 用以实现调用方法

打开AppDelegate.m

首先引入头文件

1 #import "UserGuideViewController.h"2 #import "WeiBoViewController.h"

WeiBoViewController是我的根视图

application: didFinishLaunchingWithOptions: 方法内进行判断

 1 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 2 { 3     self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease]; 4     // Override point for customization after application launch. 5      6     //判断是不是第一次启动应用 7     if(![[NSUserDefaults standardUserDefaults] boolForKey:@"firstLaunch"]) 8     { 9         [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"firstLaunch"];10         NSLog(@"第一次启动");        11         //如果是第一次启动的话,使用UserGuideViewController (用户引导页面) 作为根视图12         UserGuideViewController *userGuideViewController = [[UserGuideViewController alloc] init];13         self.window.rootViewController = userGuideViewController;14         [userGuideViewController release];15     }16     else17     {18         NSLog(@"不是第一次启动");19         //如果不是第一次启动的话,使用LoginViewController作为根视图20         WeiBoViewController *weiBoViewController = [[WeiBoViewController alloc] init];21         self.window.rootViewController = weiBoViewController;22         [weiBoViewController release];23 24     }25     26     self.window.backgroundColor = [UIColor whiteColor];27     [self.window makeKeyAndVisible];28     return YES;29 }

这样,就可以实现第一次打开应用显示用户引导之后不再显示

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