iOS Gettingstarted

Getting Started

小程序启动会有两种情况，一种是「冷启动」，一种是「热启动」。 假如用户已经打开过某小程序，然后在一定时间内再次打开该小程序，此时无需重新启动，只需将后台态的小程序切换到前台，这个过程就是热启动；冷启动指的是用户首次打开，此时小程序会重新加载启动。

更新机制

小程序冷启动时回去本地资源包中查询version文件，根据version文件中的base_version 的版本来获取本地的base包和所需也业务包，查询包的过程会先在本地文件路径中查询，如果没查到回去资源包中查询，如果都没有会异步的从服务器下载，下载后的zip文件，会解压到本地的文件夹，下次启动可以直接在本地获取资源，

生命周期

小程序是基于viewcontroller 来创建的,所以小程序的生命周期和该 ViewController 相同

启动流程

• 创建 QIYIMPViewNavController

   QIYIMPViewNavController* vc = [QIYIMPViewNavController alloc];
  

  ​

• 实现 QIYIAsset 接口，实现 QIYIMPViewControllerDelegate

    _asset = [[QIYIAssetsImpl alloc] init];
    _delegateImpl = [[QIYIDelegateImpl alloc] init];
  

  ​

• 跳转到 Lite-App ViewController

   [self presentViewController:vc animated:YES completion:^{
      }];
  

  ​

• 获取所需的资源文件包（两种方式静态-本地缓存 或者 动态-网络获取）

   self.updateSuccessCallback = complement;
       __weak QIYIConstitute* ws = self;
      if ([ws compareVersion]) {
          [ws comparePackage];
      }else{
          [ws request:self.project parameter:__QIYI_LOCAL_VERSION callback:^(BOOL callback) {
          }];
      }
  

  ​

• 加载manifest文件，根据manifest文件加载 Tabbar、Navigationbar,Webview等UI

  • Tabbar

     QIYIManifestTabbarBundle* tabbar = [self.manifest obtainTabbarBundle];
         NSUInteger showCount = 0;
         NSString* name = [self.manifest ontainMainPage];
        if (tabbar && tabbar.items && self.asset) {
            pagesCount = tabbar.items.count;
            if (pagesCount > 1) {
                tabbarView = [[QIYITabbar alloc] init];
                for (NSUInteger i = 0; i < pagesCount; ++i) {
                    QIYIManifestTabbarBundleItem* bundleItem = tabbar.items[i];
                    if (bundleItem) {
                        QIYITabbarItem* item = [[QIYITabbarItem alloc] init];
                        item.title = bundleItem.title;
                        item.titleSelectedColor = bundleItem.titleSelectedColor;
                        item.titleUnSelectedColor = bundleItem.titleUnSelectedColor;
                        item.selectedIcon = [UIImage imageWithData:[self.asset obtainFile:bundleItem.selectedIcon]];
                        item.unselectedIcon = [UIImage imageWithData:[self.asset obtainFile:bundleItem.unselectedIcon]];
                        [item construct];
                        [tabbarView addItem:item];
                        if ([bundleItem.name isEqualToString:name]) {
                            showCount = i;
                            item.selected = true;
                        }
                        
                    }
                }
            }
        }
        if (nil != tabbarView) {
            tabbarViewHeight = tabbarView.frame.size.height;
            float tabbarViewTop = __SCREEN_HEIGHT - tabbarViewHeight;
            tabbarView.frame = CGRectMake(0, tabbarViewTop, __SCREEN_WIDTH, tabbarViewHeight);
            [self.view addSubview:tabbarView];
            __weak QIYIMPMainViewController* ws = self;
            tabbarView.bOnTabbarSelected = ^(NSUInteger index) {
                if (ws && self.container) {
                    [self.container show:index];
                }
            };
        }
    

    ​

  • NavigationBar

    QIYINavigationBar* bar = [[QIYINavigationBar alloc] init];
        self.navigationbarView = bar;
        [self.view addSubview:self.navigationbarView];
        if ([self.navigationbarView conformsToProtocol:@protocol(QIYINavigationBarBase)]) {
            self.navigationbar = bar;
        }
    

    ​

  • Webview

     self.container = [[QIYIContainerCombine alloc] init:pagesCount<1 ? 1 : pagesCount];
        float contianerHeight = __SCREEN_HEIGHT - navigationBarHeight - tabbarViewHeight;
        self.container.frame = CGRectMake(0, navigationBarHeight, __SCREEN_WIDTH, contianerHeight);
        if (tabbar && tabbar.items && self.asset) {
            for (NSUInteger i = 0; i < pagesCount; ++i) {
                QIYIManifestTabbarBundleItem* bundleItem = tabbar.items[i];
                if (bundleItem) {
                    QIYIContainer* container = [self.container at:i];
                    if (container) {
                        container.name = bundleItem.name;
                        [self configContainer:container];
                    }
                }
            }
            if (pagesCount == 0) {
                    QIYIContainer* container = [self.container at:0];
                    if (container) {
                        container.name = name;
                        [self configContainer:container];
                    }
            }
        }
        [self.view addSubview:self.container];
        [self.container show:showCount];
    

    ​

• 注入 bundle.js 到自定义的js执行器中

      NSString* json = @"{}";
      json = [@"__page__data =" stringByAppendingString:json];
      NSData *data = [json dataUsingEncoding:NSUTF8StringEncoding];
      [container evaluateScript:data];
  

  ​

• 展示最终页面