[iOS微博项目 - 1.7] - 版本新特性

A.版本新特性

1.需求

• 第一次使用新版本的时候，不直接进入app，而是展示新特性界面

github: https://github.com/hellovoidworld/HVWWeibo

 

 

 

2.思路

• [[NSBundle mainBundle] infoDictionary]取得当前版本号（最新版本），版本号存储在了info.plist中
• 从preference取得上一次使用的版本号
• 将讲个版本号进行对比，如果相同就是当前是最新版本，直接进入app；如果不相同，就进入新特性界面并保存最新版本号到preference

 

当前版本号：

 

当前版本号的key

 

 

3.实现

（1）创建一个新的目录来处理新特性加载

 

自定义一个集成UIViewController的类来处理新特性界面

（注意scrollView没有相应控制器，只能在其他view上加载）

 

 

（2）在AppDelegate中app加载完毕方法中

 

 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
     // Override point for customization after application launch.

     // 启动后显示状态栏
     UIApplication *app = [UIApplication sharedApplication];
     app.statusBarHidden = NO;

     // 设置window
     self.window = [[UIWindow alloc] init];
     self.window.frame = [UIScreen mainScreen].bounds;

     /** 新版本特性 */
     // app现在的版本
     // 由于使用的时Core Foundation的东西，需要桥接
     NSString *versionKey = (__bridge NSString*) kCFBundleVersionKey;
     NSDictionary *infoDic = [[NSBundle mainBundle] infoDictionary];
     NSString *currentVersion = [infoDic objectForKey:versionKey];

     // 上次使用的版本
     NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
     NSString *lastVersion = [defaults stringForKey:versionKey];

     // 如果版本变动了，存储新的版本号并启动新版本特性图
     if (![lastVersion isEqualToString:currentVersion]) {

         // 存储
         [defaults setObject:currentVersion forKey:versionKey];
         [defaults synchronize];

         // 开启app显示新特性
         HVWNewFeatureViewController *newFeatureVC = [[HVWNewFeatureViewController alloc] init];
         self.window.rootViewController = newFeatureVC;
     } else {
         // 创建根控制器
         HVWTabBarViewController *tabVC = [[HVWTabBarViewController alloc] init];
         self.window.rootViewController = tabVC;
     }

     [self.window makeKeyAndVisible];

     return YES;
 }

 

 

 

B.版本新特性的内容

1.需求

• 在特特性界面使用轮播方式显示若干个界面
• 最后一个界面提供一个分享功能和进入app功能

 

2.思路

• 在新特性控制器的view上加入一个全屏的scrollView

 

3.实现

 //
 //  HVWNewFeatureViewController.m
 //  HVWWeibo
 //
 //  Created by hellovoidworld on 15/2/3.
 //  Copyright (c) 2015年 hellovoidworld. All rights reserved.
 //

 #import "HVWNewFeatureViewController.h"
 #import "HVWTabBarViewController.h"

 #define NewFeatureCount 4

 @interface HVWNewFeatureViewController () <UIScrollViewDelegate>

 @property(nonatomic, strong) UIPageControl *pageControl;

 @end

 @implementation HVWNewFeatureViewController

 - (void)viewDidLoad {
     [super viewDidLoad];
     // Do any additional setup after loading the view.

     // 添加scrollView
     [self setupScrollView];

     // 添加pageControl
     [self setupPageControl];
 }

 /** 添加scrollView */
 - (void) setupScrollView {
     // 创建一个scrollView
     UIScrollView *scrollView = [[UIScrollView alloc] init];
     scrollView.frame = self.view.bounds;

     // 添加图片
     for (int i=; i<NewFeatureCount; i++) {

         // 获取图片
         NSString *featureImageName = [NSString stringWithFormat:@"new_feature_%d", i+];
         UIImageView *featureImageView = [[UIImageView alloc] initWithImage:[UIImage imageWithNamed:featureImageName]];

         // 设置图片尺寸位置
         CGFloat featureWidth = self.view.width;
         CGFloat featureHeight = self.view.height;
         CGFloat featureX = featureImageView.width * i;
         CGFloat featureY = ;
         featureImageView.frame = CGRectMake(featureX, featureY, featureWidth, featureHeight);

         // 如果是最后一页，加上功能按钮
         if (i == (NewFeatureCount - )) {
             // 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
             featureImageView.userInteractionEnabled = YES;

             [self addFunctionButton:featureImageView];
         }

         // 添加图片到scrollView
         [scrollView addSubview:featureImageView];
     }

     // 设置scrollView功能属性
     scrollView.userInteractionEnabled = YES;
     scrollView.scrollEnabled = YES; // 支持滚动
     scrollView.contentSize = CGSizeMake(self.view.width * NewFeatureCount, ); // 只需要水平滚动
     scrollView.pagingEnabled = YES; // 支持分页
     scrollView.showsHorizontalScrollIndicator = NO; // 隐藏水平滚动条

     // 设置背景色
     scrollView.backgroundColor = [UIColor colorWithRed:/255.0 green:/255.0 blue:/255.0 alpha:1.0];

     // 设置代理
     scrollView.delegate = self;

     // 添加
     [self.view addSubview:scrollView];
 }

 /** 添加pageControl */
 - (void) setupPageControl {
     // pageControl不能加在scrollView上，不然会随着内容一起滚动
     UIPageControl *pageControl = [[UIPageControl alloc] init];
     pageControl.pageIndicatorTintColor = [UIColor blackColor];
     pageControl.currentPageIndicatorTintColor = [UIColor redColor];
     pageControl.numberOfPages = NewFeatureCount;

     // 设置位置
     pageControl.centerX = self.view.width * 0.5;
     pageControl.centerY = self.view.height * 0.9;

     self.pageControl = pageControl;
     [self.view addSubview:pageControl];
 }

 #pragma mark - UIScrollViewDelegate
 /** scrollView滚动代理方法，在这里控制页码指示器 */
 - (void)scrollViewDidScroll:(UIScrollView *)scrollView {
     // 四舍五入，让图片滚动超过中线的时候改变页码
     self.pageControl.currentPage = scrollView.contentOffset.x / scrollView.width + 0.5;
 }

 #pragma mark - 最后一页的功能
 /** 添加功能按钮 */
 - (void) addFunctionButton:(UIImageView *) imageView {
     // 添加"分享"选项按钮
     [self addShareButton:imageView];

     // 添加"进入微博"按钮
     [self addEnterWeiboButton:imageView];
 }

 /** 分享选项按钮 */
 - (void) addShareButton:(UIImageView *) imageView  {
     // 创建按钮
     UIButton *shareButton = [UIButton buttonWithType:UIButtonTypeCustom];

     [shareButton setTitle:@"分享给大家" forState:UIControlStateNormal];

     [shareButton setImage:[UIImage imageWithNamed:@"new_feature_share_false"] forState:UIControlStateNormal];
     [shareButton setImage:[UIImage imageWithNamed:@"new_feature_share_true"] forState:UIControlStateSelected];

     [shareButton addTarget:self action:@selector(shareButtonClicked:) forControlEvents:UIControlEventTouchUpInside];

     [shareButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];

     // 位置尺寸
     shareButton.size = CGSizeMake(, );

     // 必须先设置了size，center才真的在中心，不然就是从左上角开始!!!
     shareButton.centerX = self.view.width * 0.5;
     shareButton.centerY = self.view.height * 0.65;

     // 设置内间距
     shareButton.titleEdgeInsets = UIEdgeInsetsMake(, 10.0, , );

     // 添加
     [imageView addSubview:shareButton];
 }

 /** 分享选项点击事件方法 */
 - (void) shareButtonClicked:(UIButton *) button {
     button.selected = !button.selected;
 }

 /** “进入微博"按钮 */
 - (void) addEnterWeiboButton:(UIImageView *) imageView  {
     // 创建按钮
     UIButton *enterButton = [UIButton buttonWithType:UIButtonTypeCustom];
     enterButton.userInteractionEnabled = YES;
     [enterButton setBackgroundImage:[UIImage imageWithNamed:@"new_feature_finish_button"] forState:UIControlStateNormal];
     [enterButton setBackgroundImage:[UIImage imageWithNamed:@"new_feature_finish_button_highlighted"] forState:UIControlStateHighlighted];
     [enterButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
     [enterButton setTitle:@"进入微博" forState:UIControlStateNormal];

     // 位置尺寸
     enterButton.size = enterButton.currentBackgroundImage.size;
     enterButton.centerX = self.view.width * 0.5;
     enterButton.centerY = self.view.height * 0.8;

     // 监听点击
     [enterButton addTarget:self action:@selector(enterWeiboButtonClicked) forControlEvents:UIControlEventTouchUpInside];

     // 添加
     [imageView addSubview:enterButton];
 }

 /** “进入微博” 按钮点击 */
 - (void) enterWeiboButtonClicked {
     UIWindow *window = [UIApplication sharedApplication].keyWindow;
     window.rootViewController = [[HVWTabBarViewController alloc] init];
 }

 @end