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search-box"><input id="algolia-search-input" class="search-query"></form><nav class="nav-links can-hide"><div class="nav-item"><a href="/guide/" class="nav-link">Guide</a></div><div class="nav-item"><a href="/docs/" class="nav-link router-link-active">Docs</a></div><div class="nav-item"><a href="/tools/" class="nav-link">Third Party Tools</a></div><div class="nav-item"><a href="/download/" class="nav-link">Download</a></div><div class="nav-item"><a href="/community/" class="nav-link">Community</a></div><div class="nav-item"><a href="/blog/" class="nav-link">Blog</a></div><div class="nav-item"><div class="dropdown-wrapper"><a class="dropdown-title"><span class="title">Languages</span><span class="arrow right"></span></a><ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----><a href="/docs/api/ios-apis.html" class="nav-link router-link-exact-active router-link-active">English</a></li><li class="dropdown-item"><!----><a href="/zh/docs/api/ios-apis.html" 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style="display:none;"><li class="dropdown-item"><!----><a href="/docs/api/ios-apis.html" class="nav-link router-link-exact-active router-link-active">English</a></li><li class="dropdown-item"><!----><a href="/zh/docs/api/ios-apis.html" class="nav-link">简体中文</a></li></ul></div></div></nav><ul class="sidebar-links"><li><div class="sidebar-group first"><p class="sidebar-heading open"><span>API</span><!----></p><ul class="sidebar-group-items"><li><a href="/docs/api/weex-variable.html" class="sidebar-link">Weex Variable</a></li><li><a href="/docs/api/android-apis.html" class="sidebar-link">Android APIs</a></li><li><a href="/docs/api/ios-apis.html" class="active sidebar-link">iOS APIs</a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a href="/docs/api/ios-apis.html#handler-like-android-adapter" class="sidebar-link">Handler(like Android Adapter)</a></li><li class="sidebar-sub-header"><a href="/docs/api/ios-apis.html#native-interacts-with-javascript" class="sidebar-link">Native interacts with JavaScript</a></li><li class="sidebar-sub-header"><a href="/docs/api/ios-apis.html#set-size-of-the-weex-container" class="sidebar-link">Set size of the Weex container</a></li><li class="sidebar-sub-header"><a href="/docs/api/ios-apis.html#downgrade" class="sidebar-link">Downgrade</a></li></ul></li><li><a href="/docs/api/js-service.html" class="sidebar-link">JS Service</a></li><li><a href="/docs/api/broadcast-channel.html" class="sidebar-link">BroadcastChannel</a></li></ul></div></li><li><div class="sidebar-group"><p class="sidebar-heading"><span>Built-in Components</span><!----></p><ul class="sidebar-group-items"><li><a href="/docs/components/a.html" class="sidebar-link"><a></a></li><li><a href="/docs/components/div.html" class="sidebar-link"><div></a></li><li><a href="/docs/components/text.html" class="sidebar-link"><text></a></li><li><a href="/docs/components/image.html" class="sidebar-link"><image></a></li><li><a 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href="/docs/components/web.html" class="sidebar-link"><web></a></li><li><a href="/docs/components/richtext.html" class="sidebar-link"><richtext></a></li></ul></div></li><li><div class="sidebar-group"><p class="sidebar-heading"><span>Built-in Modules</span><!----></p><ul class="sidebar-group-items"><li><a href="/docs/modules/animation.html" class="sidebar-link">animation</a></li><li><a href="/docs/modules/clipboard.html" class="sidebar-link">clipboard</a></li><li><a href="/docs/modules/dom.html" class="sidebar-link">dom</a></li><li><a href="/docs/modules/globalEvent.html" class="sidebar-link">globalEvent</a></li><li><a href="/docs/modules/meta.html" class="sidebar-link">meta</a></li><li><a href="/docs/modules/modal.html" class="sidebar-link">modal</a></li><li><a href="/docs/modules/navigator.html" class="sidebar-link">navigator</a></li><li><a href="/docs/modules/picker.html" class="sidebar-link">picker</a></li><li><a href="/docs/modules/storage.html" class="sidebar-link">storage</a></li><li><a href="/docs/modules/stream.html" class="sidebar-link">stream</a></li><li><a href="/docs/modules/webview.html" class="sidebar-link">webview</a></li><li><a href="/docs/modules/websockets.html" class="sidebar-link">webSockets</a></li><li><a href="/docs/modules/deviceInfo.html" class="sidebar-link">deviceInfo</a></li><li><a href="/docs/modules/console-log.html" class="sidebar-link">console-log</a></li></ul></div></li><li><div class="sidebar-group"><p class="sidebar-heading"><span>Styles</span><!----></p><ul class="sidebar-group-items"><li><a href="/docs/styles/common-styles.html" class="sidebar-link">Common Styles</a></li><li><a href="/docs/styles/text-styles.html" class="sidebar-link">Text Styles</a></li><li><a href="/docs/styles/css-units.html" class="sidebar-link">CSS Units</a></li><li><a href="/docs/styles/color-name.html" class="sidebar-link">Color name</a></li></ul></div></li><li><div class="sidebar-group"><p class="sidebar-heading"><span>Events</span><!----></p><ul class="sidebar-group-items"><li><a href="/docs/events/common-events.html" class="sidebar-link">Common Events</a></li><li><a href="/docs/events/event-bubbling.html" class="sidebar-link">Event Bubble</a></li><li><a href="/docs/events/gesture.html" class="sidebar-link">Gesture</a></li></ul></div></li></ul></div><div class="page"><div class="content"><h1 id="ios-apis"><a href="#ios-apis" class="header-anchor">#</a> iOS APIs</h1><h2 id="handler-like-android-adapter"><a href="#handler-like-android-adapter" class="header-anchor">#</a> Handler(like Android Adapter)</h2><ul><li><p><code>WXImgLoaderDefaultImpl</code> Image load handler. Weex need to implement this interface to download the picture. The interface is defined as follows:</p><div class="language-object-c extra-class"><pre class="language-text"><code> @protocol WXImgLoaderProtocol <WXModuleProtocol> |
| /** |
| * @abstract Creates a image download handler with a given URL |
| * |
| * @param imageUrl The URL of the image to download |
| * |
| * @param imageFrame The frame of the image you want to set |
| * |
| * @param options : The options to be used for this download |
| * |
| * @param completedBlock : A block called once the download is completed. |
| * image : the image which has been download to local. |
| * error : the error which has happened in download. |
| * finished : a Boolean value indicating whether download action has finished. |
| */ |
| - (id<WXImageOperationProtocol>)downloadImageWithURL:(NSString *)url imageFrame:(CGRect)imageFrame userInfo:(NSDictionary *)options completed:(void(^)(UIImage *image, NSError *error, BOOL finished))completedBlock; |
| @end |
| </code></pre></div></li></ul><h2 id="native-interacts-with-javascript"><a href="#native-interacts-with-javascript" class="header-anchor">#</a> Native interacts with JavaScript</h2><ul><li><p>Custom events</p><p>Used for a custom control for event notifications, such as custom click events, response drop events, and so on. This is a method in the component base class that can be used directly.</p><div class="language-object-c extra-class"><pre class="language-text"><code>/** |
| * @abstract Fire an event to the component and tell Javascript which value has been changed. |
| * @param eventName |
| * @param params |
| * @param domChanges |
| **/ |
| - (void)fireEvent:(NSString *)eventName params:(NSDictionary *)params domChanges:(NSDictionary *)domChanges |
| </code></pre></div></li><li><p>Event callback</p><p>Used for Module callback. There are two types of callback:</p><ul><li><p><code>WXModuleCallback</code>: For performance reasons, the callback can only callback js once, and then will be released.</p></li><li><p><code>WXModuleKeepAliveCallback</code>: This callback can be set to multiple callbacks, multiple callbacks of the scene such as continually listen scrolls event and return to js.</p></li></ul><div class="language-object-c extra-class"><pre class="language-text"><code>@implementation WXEchoModule |
| @synthesize weexInstance; |
| WX_EXPORT_METHOD(@selector(echo:)) |
| - (void)echo:(NSString *)param callback:(WXModuleKeepAliveCallback)callback |
| { |
| callback(param,ture); |
| } |
| </code></pre></div></li></ul><h2 id="set-size-of-the-weex-container"><a href="#set-size-of-the-weex-container" class="header-anchor">#</a> Set size of the Weex container</h2><p>You can use the <code>setFrame(CGRect)</code> method to change the size of the Weex container.</p><h2 id="downgrade"><a href="#downgrade" class="header-anchor">#</a> Downgrade</h2><p>Weex in the development stage will add some new features and new methods, but these new features and functions must be upgraded to achieve the SDK, for the application should not be upgraded how to deal with it? You can use the downgrade feature.</p><p>Native can be handled by the <code>onFailed</code> method in interface <code>WXSDKInstance</code>, and if it is an active demoulding error domain is <code>TemplateErrorType</code>, and the Native side can jump to the corresponding H5 page. Or otherwise prompted the user’s current environment does not support Weex.</p></div><div class="page-nav"><p class="inner"><span class="prev"> |
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