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.windowmakeKeyAndVisible];//一定要在这行代码之后加引导页

//数据类

userData = [FirstSingleData shardFirst];

  [userDatagetFirstList];

        //添加引导页

        [selfaddGuideView];

returnYES;

}

//引导页只执行一次

- (void)addGuideView

{

    //  读取沙盒数据

    NSUserDefaults * settings1 = [NSUserDefaultsstandardUserDefaults];

   NSString *key1 = @"is_first";

   NSString *value = [settings1 objectForKey:key1];

    

    //  如果没有数据

   if (!value)

    {

        //  加入引导页

        [selfaddIntroView];

       //  写入数据

        NSUserDefaults * setting = [NSUserDefaultsstandardUserDefaults];

       NSString * key = @"is_first";

        [setting setObject:[NSStringstringWithFormat:@"false"]forKey:key];

        [settingsynchronize];

    }else{

        //如果不是第一次运行程序,直接进入主页面

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

        [root.tabBarsetHidden:YES];

        [self.windowsetRootViewController: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.dataDicobjectForKey:@"guide"];

    

   introduceView = [[UIScrollViewalloc] 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.windowaddSubview:introduceView];

    

    [introduceViewrelease];

    

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

        

       NSDictionary * dic = [imageArray objectAtIndex:i];

       UIImageView * scrollImage = [[UIImageViewalloc]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.

                [scrollImagesetImageWithURL:[NSURLURLWithString:[selfimageAddHandle:imagePath]]placeholderImage:[UIImageimageNamed:@"[e-mail]"]];

                

            }else{

                

                [scrollImagesetImageWithURL:[NSURLURLWithString:[selfimageAddHandle:imagePath]]placeholderImage:nil];

            }

            

        }elseif (height == 480){

            

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

            

           if (i == 0) {

                

                [scrollImagesetImageWithURL:[NSURLURLWithString:[selfimageAddHandle:imagePath]]placeholderImage:[UIImageimageNamed:@"Default@2x"]];

                

            }else{

                

                [scrollImagesetImageWithURL:[NSURLURLWithString:[selfimageAddHandle:imagePath]]placeholderImage:nil];

            }

        }

        scrollImage.tag =300 + i;

        [introduceViewaddSubview:scrollImage];

        [scrollImagerelease];

        

    }

    

    //获取最后一张图片

   lastView = (UIImageView *)[introduceViewviewWithTag: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 = [[UITapGestureRecognizeralloc] init];

    

    [tapGestureRecognizeraddTarget:selfaction:@selector(gestureRecognizerHandle:)];

    

    [tapGestureRecognizersetNumberOfTapsRequired:1];

    

    [tapGestureRecognizersetNumberOfTouchesRequired:1];

    

    [lastViewaddGestureRecognizer:tapGestureRecognizer];

    

    [tapGestureRecognizerrelease];

}

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

    //移除引导页

    [introduceViewremoveFromSuperview];

    

    //进入主页面

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

    [root.tabBarsetHidden:YES];

    [self.windowsetRootViewController:root];

    

}

//对图片的路径进行处理

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

    

   NSString *tempBgSkinPicUrlLString = [aString substringFromIndex:9];

   NSString *tempNewBgSkinPicUrlLString = [SERVERADDstringByAppendingString:tempBgSkinPicUrlLString];

   return tempNewBgSkinPicUrlLString;

   

}