1 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { 2     // Override point for customization after application launch. 3     4     // 启动后显示状态栏 5     UIApplication *app = [UIApplication sharedApplication]; 6     app.statusBarHidden = NO; 7     8     // 设置window 9     self.window = [[UIWindow alloc] init];10     self.window.frame = [UIScreen mainScreen].bounds;11    12     /** 新版本特性 */13     // app现在的版本14     // 由于使用的时Core Foundation的东西，需要桥接15     NSString *versionKey = (__bridge NSString*) kCFBundleVersionKey;16     NSDictionary *infoDic = [[NSBundle mainBundle] infoDictionary];17     NSString *currentVersion = [infoDic objectForKey:versionKey];18    19     // 上次使用的版本20     NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];21     NSString *lastVersion = [defaults stringForKey:versionKey];22 23     // 如果版本变动了，存储新的版本号并启动新版本特性图24     if (![lastVersion isEqualToString:currentVersion]) {25        26         // 存储27         [defaults setObject:currentVersion forKey:versionKey];28         [defaults synchronize];29        30         // 开启app显示新特性31         HVWNewFeatureViewController *newFeatureVC = [[HVWNewFeatureViewController alloc] init];32         self.window.rootViewController = newFeatureVC;33     } else {34         // 创建根控制器35         HVWTabBarViewController *tabVC = [[HVWTabBarViewController alloc] init];36         self.window.rootViewController = tabVC;37     }38 39     [self.window makeKeyAndVisible];40    41     return YES;42 }

  1 //  2 //  HVWNewFeatureViewController.m  3 //  HVWWeibo  4 //  5 //  Created by hellovoidworld on 15/2/3.  6 //  Copyright (c) 2015年 hellovoidworld. All rights reserved.  7 //  8   9 #import "HVWNewFeatureViewController.h" 10 #import "HVWTabBarViewController.h" 11  12 #define NewFeatureCount 4 13  14 @interface HVWNewFeatureViewController () <UIScrollViewDelegate> 15  16 @property(nonatomic, strong) UIPageControl *pageControl; 17  18 @end 19  20 @implementation HVWNewFeatureViewController 21  22 - (void)viewDidLoad { 23     [super viewDidLoad]; 24     // Do any additional setup after loading the view. 25     26     // 添加scrollView 27     [self setupScrollView]; 28     29     // 添加pageControl 30     [self setupPageControl]; 31 } 32  33 /** 添加scrollView */ 34 - (void) setupScrollView { 35     // 创建一个scrollView 36     UIScrollView *scrollView = [[UIScrollView alloc] init]; 37     scrollView.frame = self.view.bounds; 38     39     // 添加图片 40     for (int i=0; i<NewFeatureCount; i++) { 41         42         // 获取图片 43         NSString *featureImageName = [NSString stringWithFormat:@"new_feature_%d", i+1]; 44         UIImageView *featureImageView = [[UIImageView alloc] initWithImage:[UIImage imageWithNamed:featureImageName]]; 45         46         // 设置图片尺寸位置 47         CGFloat featureWidth = self.view.width; 48         CGFloat featureHeight = self.view.height; 49         CGFloat featureX = featureImageView.width * i; 50         CGFloat featureY = 0; 51         featureImageView.frame = CGRectMake(featureX, featureY, featureWidth, featureHeight); 52         53         // 如果是最后一页，加上功能按钮 54         if (i == (NewFeatureCount - 1)) { 55             // 为了让最后一页的的功能按钮能够生效，必须激活交互功能 56             featureImageView.userInteractionEnabled = YES; 57             58             [self addFunctionButton:featureImageView]; 59         } 60         61         // 添加图片到scrollView 62         [scrollView addSubview:featureImageView]; 63     } 64     65     // 设置scrollView功能属性 66     scrollView.userInteractionEnabled = YES; 67     scrollView.scrollEnabled = YES; // 支持滚动 68     scrollView.contentSize = CGSizeMake(self.view.width * NewFeatureCount, 0); // 只需要水平滚动 69     scrollView.pagingEnabled = YES; // 支持分页 70     scrollView.showsHorizontalScrollIndicator = NO; // 隐藏水平滚动条 71     72     // 设置背景色 73     scrollView.backgroundColor = [UIColor colorWithRed:246/255.0 green:246/255.0 blue:246/255.0 alpha:1.0]; 74     75     // 设置代理 76     scrollView.delegate = self; 77     78     // 添加 79     [self.view addSubview:scrollView]; 80 } 81  82 /** 添加pageControl */ 83 - (void) setupPageControl { 84     // pageControl不能加在scrollView上，不然会随着内容一起滚动 85     UIPageControl *pageControl = [[UIPageControl alloc] init]; 86     pageControl.pageIndicatorTintColor = [UIColor blackColor]; 87     pageControl.currentPageIndicatorTintColor = [UIColor redColor]; 88     pageControl.numberOfPages = NewFeatureCount; 89     90     // 设置位置 91     pageControl.centerX = self.view.width * 0.5; 92     pageControl.centerY = self.view.height * 0.9; 93     94     95     self.pageControl = pageControl; 96     [self.view addSubview:pageControl]; 97 } 98  99 #pragma mark - UIScrollViewDelegate100 /** scrollView滚动代理方法，在这里控制页码指示器 */101 - (void)scrollViewDidScroll:(UIScrollView *)scrollView {102     // 四舍五入，让图片滚动超过中线的时候改变页码103     self.pageControl.currentPage = scrollView.contentOffset.x / scrollView.width + 0.5;104 }105 106 #pragma mark - 最后一页的功能107 /** 添加功能按钮 */108 - (void) addFunctionButton:(UIImageView *) imageView {109     // 添加"分享"选项按钮110     [self addShareButton:imageView];111    112     // 添加"进入微博"按钮113     [self addEnterWeiboButton:imageView];114 }115 116 /** 分享选项按钮 */117 - (void) addShareButton:(UIImageView *) imageView  {118     // 创建按钮119     UIButton *shareButton = [UIButton buttonWithType:UIButtonTypeCustom];120    121     [shareButton setTitle:@"分享给大家" forState:UIControlStateNormal];122    123     [shareButton setImage:[UIImage imageWithNamed:@"new_feature_share_false"] forState:UIControlStateNormal];124     [shareButton setImage:[UIImage imageWithNamed:@"new_feature_share_true"] forState:UIControlStateSelected];125    126    127     [shareButton addTarget:self action:@selector(shareButtonClicked:) forControlEvents:UIControlEventTouchUpInside];128    129     [shareButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];130    131     // 位置尺寸132     shareButton.size = CGSizeMake(150, 50);133    134     // 必须先设置了size，center才真的在中心，不然就是从左上角开始!!!135     shareButton.centerX = self.view.width * 0.5;136     shareButton.centerY = self.view.height * 0.65;137 138     // 设置内间距139     shareButton.titleEdgeInsets = UIEdgeInsetsMake(0, 10.0, 0, 0);140    141     // 添加142     [imageView addSubview:shareButton];143 }144 145 /** 分享选项点击事件方法 */146 - (void) shareButtonClicked:(UIButton *) button {147     button.selected = !button.selected;148 }149 150 /** “进入微博"按钮 */151 - (void) addEnterWeiboButton:(UIImageView *) imageView  {152     // 创建按钮153     UIButton *enterButton = [UIButton buttonWithType:UIButtonTypeCustom];154     enterButton.userInteractionEnabled = YES;155     [enterButton setBackgroundImage:[UIImage imageWithNamed:@"new_feature_finish_button"] forState:UIControlStateNormal];156     [enterButton setBackgroundImage:[UIImage imageWithNamed:@"new_feature_finish_button_highlighted"] forState:UIControlStateHighlighted];157     [enterButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];158     [enterButton setTitle:@"进入微博" forState:UIControlStateNormal];159    160     // 位置尺寸161     enterButton.size = enterButton.currentBackgroundImage.size;162     enterButton.centerX = self.view.width * 0.5;163     enterButton.centerY = self.view.height * 0.8;164    165     // 监听点击166     [enterButton addTarget:self action:@selector(enterWeiboButtonClicked) forControlEvents:UIControlEventTouchUpInside];167    168     // 添加169     [imageView addSubview:enterButton];170 }171 172 /** “进入微博” 按钮点击 */173 - (void) enterWeiboButtonClicked {174     UIWindow *window = [UIApplication sharedApplication].keyWindow;175     window.rootViewController = [[HVWTabBarViewController alloc] init];176 }177 178 @end