添加引导页 (引导页的图片根据网络请求获取,张数不一定)

程序通常会有启动页和引导页.

启动页每一次运行程序都会有;

引导页只有在程序第一次运行时,才有.

下面说一下我做的引导页的过程

在AppDelegate里面.h文件中

@interface AppDelegate : UIResponder <UIApplicationDelegate, UIAlertViewDelegate,UIScrollViewDelegate>

{

    FirstSingleData *userData;

    UIScrollView * introduceView;

    UIImageView * lastView;

}

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions

{

    self.window.backgroundColor = [UIColor whiteColor];

    [self.window makeKeyAndVisible];//一定要在这行代码之后加引导页

//数据类

userData = [FirstSingleData shardFirst];

  [userData getFirstList];

        //添加引导页

        [self addGuideView];

return YES;

}

//引导页只执行一次

- (void)addGuideView

{

    //  读取沙盒数据

    NSUserDefaults * settings1 = [NSUserDefaults standardUserDefaults];

    NSString *key1 = @"is_first";

    NSString *value = [settings1 objectForKey:key1];

    

    //  如果没有数据

    if (!value)

    {

        //  加入引导页

        [self addIntroView];

        //  写入数据

        NSUserDefaults * setting = [NSUserDefaults standardUserDefaults];

        NSString * key = @"is_first";

        [setting setObject:[NSString stringWithFormat:@"false"] forKey:key];

        [setting synchronize];

    }else{

        //如果不是第一次运行程序,直接进入主页面

        MyTabBarViewController * root = [[[MyTabBarViewController alloc]init]autorelease];

        [root.tabBar setHidden:YES];

        [self.window setRootViewController:root];   

    }

}

//添加引导页

- (void)addIntroView

{

    //判断屏幕尺寸

    float height = 0.0;

    if (iPhone5) {

        height = 568;

        

    }else{

        height = 480;

    }

    //图片路径的数组

    NSMutableArray * imageArray = [userData.dataDic objectForKey:@"guide"];

    

    introduceView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 320, height)];

    

    introduceView.showsHorizontalScrollIndicator = NO;

    

    introduceView.contentSize = CGSizeMake(320 * imageArray.count, 0);

    

    introduceView.pagingEnabled = YES;

    

    introduceView.bounces = NO;

    

    introduceView.delegate = self;

    

    [self.window addSubview:introduceView];

    

    [introduceView release];

    

    for (int i = 0; i < [imageArray count]; i++){

        

        NSDictionary * dic = [imageArray objectAtIndex:i];

        UIImageView * scrollImage = [[UIImageView alloc]initWithFrame:CGRectMake(320*i, 0, 320, height)];

        if (height == 568) {

            NSString * imagePath = [dic objectForKey:@"imgPath1"];

            NSLog(@"image%d = %@",i,imagePath);

            if (i == 0) {

                //由于第一次运行时,启动页运行完,会出现空白一段时间,原因是因为引导页的第一张图片没加载完成,

为了让视觉效果更好,启动页结束马上看到引导页,有连贯的效果,将引导页的第一张图片的placeHoder给

跟启动页一样的图片,这样就解决了这个问题.

                [scrollImage setImageWithURL:[NSURL URLWithString:[self imageAddHandle:imagePath]] placeholderImage:[UIImage imageNamed:@"Default-568h@2x.png"]];

                

            }else{

                

                [scrollImage setImageWithURL:[NSURL URLWithString:[self imageAddHandle:imagePath]] placeholderImage:nil];

            }

            

        }else if (height == 480){

            

            NSString * imagePath = [dic objectForKey:@"imgPath2"];

            

            if (i == 0) {

                

                [scrollImage setImageWithURL:[NSURL URLWithString:[self imageAddHandle:imagePath]] placeholderImage:[UIImage imageNamed:@"Default@2x"]];

                

            }else{

                

                [scrollImage setImageWithURL:[NSURL URLWithString:[self imageAddHandle:imagePath]] placeholderImage:nil];

            }

        }

        scrollImage.tag = 300 + i;

        [introduceView addSubview:scrollImage];

        [scrollImage release];

        

    }

    

    //获取最后一张图片

    lastView = (UIImageView *)[introduceView viewWithTag:imageArray.count - 1 + 300];

    

    lastView.userInteractionEnabled = YES;

    

    //给最后一张图片添加点击进入的手势

    UITapGestureRecognizer *tapGestureRecognizer = [[UITapGestureRecognizer alloc] init];

    

    [tapGestureRecognizer addTarget:self action:@selector(gestureRecognizerHandle:)];

    

    [tapGestureRecognizer setNumberOfTapsRequired:1];

    

    [tapGestureRecognizer setNumberOfTouchesRequired:1];

    

    [lastView addGestureRecognizer:tapGestureRecognizer];

    

    [tapGestureRecognizer release];

}

- (void)gestureRecognizerHandle:(UITapGestureRecognizer *)gesture{

    //移除引导页

    [introduceView removeFromSuperview];

    

    //进入主页面

    MyTabBarViewController * root = [[[MyTabBarViewController alloc]init]autorelease];

    [root.tabBar setHidden:YES];

    [self.window setRootViewController:root];

    

}

//对图片的路径进行处理

- (NSString *)imageAddHandle:(NSString *)aString {

    

    NSString *tempBgSkinPicUrlLString = [aString substringFromIndex:9];

    NSString *tempNewBgSkinPicUrlLString = [SERVERADD stringByAppendingString:tempBgSkinPicUrlLString];

    return tempNewBgSkinPicUrlLString;

   

}