如何实现App程序安装首次打开的导引图

      很多时候,在我们下载一款新的App软件后,都会发现刚开始打开时候有ScrollView的导引图,那么这种导引图是如何实现的呢?

接下来,笔者自己尝试了一下:

我的大致思路是这样的:

(1)准备好一个开机的视图控制器.上面加载的是我们导引图内容.

(2)用UserDefault来存储判断是否首次launch?

(3)如果是首次launch,则进入导引图界面.否则直接进入程序主体.

具体代码如下:

(1)准备好一个视图控制器,来存放导引图.

在最后一张导引图上面添加一个lable,然后就添加tap方法就是直接跳转主界面.

    UIImageView *imageView3 = [[[UIImageView alloc]initWithFrame:CGRectMake(640, 0, 320, SCREEN_HEIGHT)]autorelease];
    //imageView3.backgroundColor = [UIColor orangeColor];
    imageView3.image = [UIImage imageNamed:@"Default.png"];
    imageView3.userInteractionEnabled = YES;
    //在第三张的引导图上 添加 一个 button 用于进入主程序
    UIImageView *enterView = [[UIImageView alloc]initWithFrame:CGRectMake(220, 380, 40, 40)];
    enterView.image = [UIImage imageNamed:@"a.png"];
    enterView.userInteractionEnabled = YES;
    UILabel *label = [[UILabel alloc]initWithFrame:CGRectMake(220, 420, 50, 20)];
    [label setFont:[UIFont helveticaFontWithSize:12]];
    label.textColor = [UIColor blackGreen];
    label.text = @"点击进入";
    [imageView3 addSubview:label];
    [label release];

tap

    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(enterTheApp:)];
    [enterView addGestureRecognizer:tap];
    [tap release];
    
    [imageView3 addSubview:enterView];
    [enterView release];
    [self.scrollView addSubview:imageView3];

tap方法

- (void)enterTheApp:(UITapGestureRecognizer *)tapGR

{

//加载主界面.

}

(2)在AppDelegate里面添加判断方法

    //设置开机动画 设置第一次启动时有开机动画
    if (![[NSUserDefaults standardUserDefaults] boolForKey:@"firstLaunch"]) {
        [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"firstLaunch"];
        //第一次启动的开机动画
        GuidViewController *guidVC = [[GuidViewController alloc]init];
        self.window.rootViewController = guidVC;
        [guidVC release];
    }else{

    //加载主界面.

    }