iOS開發之應用首次啟動顯示用戶引導

 

這個功能的重點就是在如何判斷應用是第一次啟動的. 其實很簡單

我們只需要在一個類里面寫好用戶引導頁面  基本上都是使用UIScrollView 來實現,

新建一個繼承於UIViewController的類 命名為 UserGuideViewController ,

在UserGuideViewController.m 寫

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    self.view.backgroundColor = [UIColor redColor];
    
    [self initGuide];   //加載新用戶指導頁面
}

- (void)initGuide
{
    UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 320, 640)];
    [scrollView setContentSize:CGSizeMake(1280, 0)];
    [scrollView setPagingEnabled:YES];  //視圖整頁顯示
    //    [scrollView setBounces:NO]; //避免彈跳效果,避免把根視圖露出來
    
    UIImageView *imageview = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 320, 460)];
    [imageview setImage:[UIImage imageNamed:@"0.png"]];
    [scrollView addSubview:imageview];
    [imageview release];
    
    UIImageView *imageview1 = [[UIImageView alloc] initWithFrame:CGRectMake(320, 0, 320, 460)];
    [imageview1 setImage:[UIImage imageNamed:@"1.png"]];
    [scrollView addSubview:imageview1];
    [imageview1 release];
    
    UIImageView *imageview2 = [[UIImageView alloc] initWithFrame:CGRectMake(640, 0, 320, 460)];
    [imageview2 setImage:[UIImage imageNamed:@"2.png"]];
    [scrollView addSubview:imageview2];
    [imageview2 release];
    
    UIImageView *imageview3 = [[UIImageView alloc] initWithFrame:CGRectMake(960, 0, 320, 460)];
    [imageview3 setImage:[UIImage imageNamed:@"3.png"]];
    imageview3.userInteractionEnabled = YES;    //打開imageview3的用戶交互;否則下面的button無法響應
    [scrollView addSubview:imageview3];
    [imageview3 release];
    
    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];//在imageview3上加載一個透明的button
    [button setTitle:nil forState:UIControlStateNormal];
    [button setFrame:CGRectMake(46, 371, 230, 37)];
    [button addTarget:self action:@selector(firstpressed) forControlEvents:UIControlEventTouchUpInside];
    [imageview3 addSubview:button];
    
    [self.view addSubview:scrollView];
    [scrollView release];
}

button的方法

- (void)firstpressed
{
    [self presentModalViewController:[[[WeiBoViewController alloc] init] autorelease] animated:YES];  //點擊button跳轉到根視圖
}

 

至於添加button是因為我的用戶引導最后一個頁面有一個畫上去的button,寫着 開始使用  我在上面添加一個透明的button 用以實現調用方法

 

打開AppDelegate.m

首先引入頭文件

#import "UserGuideViewController.h"
#import "WeiBoViewController.h"

WeiBoViewController是我的根視圖

application: didFinishLaunchingWithOptions: 方法內進行判斷

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
    // Override point for customization after application launch.
    
    //判斷是不是第一次啟動應用
    if(![[NSUserDefaults standardUserDefaults] boolForKey:@"firstLaunch"])
    {
        [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"firstLaunch"];
        NSLog(@"第一次啟動");        
        //如果是第一次啟動的話,使用UserGuideViewController (用戶引導頁面) 作為根視圖
        UserGuideViewController *userGuideViewController = [[UserGuideViewController alloc] init];
        self.window.rootViewController = userGuideViewController;
        [userGuideViewController release];
    }
    else
    {
        NSLog(@"不是第一次啟動");
        //如果不是第一次啟動的話,使用LoginViewController作為根視圖
        WeiBoViewController *weiBoViewController = [[WeiBoViewController alloc] init];
        self.window.rootViewController = weiBoViewController;
        [weiBoViewController release];

    }
    
    self.window.backgroundColor = [UIColor whiteColor];
    [self.window makeKeyAndVisible];
    return YES;
}

 

這樣,就可以實現第一次打開應用顯示用戶引導 之后不再顯示