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)initGuide 11 { 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button 39 [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)firstpressed 2 { 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 else 17 { 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