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新闻 NativeScript 1.5.0 发布,跨平台移动开发 下载

本帖由 漂亮的石头2015-11-28 发布。版面名称:软件资讯

  1. 漂亮的石头

    漂亮的石头 版主 管理成员

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    NativeScript 1.5.0 发布,此版本更新内容:

    重大改进


    • 修改验证器 XSD 模式的 XML 命名空间 (xmlns),从 xmlns="http://www.nativescript.org/tns.xsd" 修改为 xmlns="http://schemas.nativescript.org/tns.xsd"

    ###Bug 修复


    • (#1089) http toString will raise error if response cannot be converted to string


    • (#1082) Null reference exception in view.android.setOnTouchListener method


    • (#1081) file-system writeTextSync will now unlock the file when it is done writing


    • (#1038) WebView with HTML string source does not render on old Android


    • (#1028) [iOS] SelectedIndex property of the TabView widget does not work


    • (#1021) page.loaded and page.navigatedTo events are fired twice on iOS


    • (#1019) search-bar color not applied correctly


    • (#1012) TextField/TextView CSS color not applied to cursor


    • (#1010) Slider CSS color/background-color support


    • (#1007) When application.start() is called twice on iOS, a meaningful error should be thrown


    • (#1004) ActivityIndicator CSS color support


    • (#1000) Border radius is not working on Android API 17


    • (#998) web-view images now will be loaded correctly with base url


    • (#993) CSS does not support new lowercase element names


    • (#990) Android 6 Webview onReceivedError


    • (#986) [iOS] The switch widget does not show up on the page


    • (#973) iOS owner pattern changed to use WeakRef in order to prevent memory leaks


    • (#966) Observable emits two propertyChange events when created with JSON


    • (#963) Always set base URL in WebView


    • (#955) Gestures event arguments for Android fixed


    • (#941) global.ios missing (consistency)


    • (#940) ListView: Inconsistency retrieving bindingContext in tap handler


    • (#936) Subsequent animation of transition and rotation or scale will appear jumpy in iOS


    • (#889) vertical-align css inconsistency


    • (#820) The x and y components of an Android translate or scale animation are not animated together when delay is specified


    • (#801) Chained animations lose state on iOS


    • (#789) Error in Page Navigating Events order


    • (#781) ios page.showModal platform inconsistancies & bugs


    • (#715) Frame crashes on app restore occasionally


    • (#642) Ability to style other native widgets

    ###新特性


    • (#1001) Embed utility fonts: Awesome, Icons, etc


    • (#1102) Ability to specify an animation easing, i.e. curve in a platform-independent manner


    • (#1086) This will now allow the dialog to call the resolve function when cancelled by clicking outside


    • (#1057) Expose scroll event on ScrollView


    • (#1048) Event for start/end of an event


    • (#1041) Support binding for class property of views


    • (#1034) Support CSS white-space: nowrap and normal


    • (#1020) DatePicker and TimePicker stylers added


    • (#1014) Button wrapText property


    • (#977) Smarter LiveSync


    • (#954) added simple showModal() overload


    • (#926) Context as to whether a navigation was back or not


    • (#922) Feature request: Add loading wheel to Dialogs module


    • (#875) CSS feature request: text-decoration


    • (#856) Android 6 support


    • (#849) Implement dismissSoftInput() for search-bar


    • (#841) Distribute TypeScript definitions


    • (#767) Change Android navigation and tabs title color


    • (#727) Provide a way to get a reference to the currently showing modal page instance


    • (#693) ListView - the position of the item after scroll down is not correct


    • (#597) Some Complex Properties are Inconsistent with rest of API - Discussion


    • (#551) Ship a verified image picker plugin


    • (#364) Ability to use built-in system icons on ActionBarItems

    下载:


    NativeScript 可以使用 Javascript,CSS, XML 创建真正的 Native 跨平台应用,支持 iOS Android,NativeScript 将您的跨平台代码翻译成目标平台的代码。

    UI 使用 XML 描述,CSS 样式,在编译时将 UI 转化成本地原生代码,最终得到正在的 Native 原生应用。

    [​IMG]

    Telerik 公开了用于创建安卓、iOS和Windows Universal跨平台原生应用的框架,NativeScript 的公共访问权限。

    NativeScript既不是一种新型的JavaScript语言,也不是原生功能的封装器,它包括一个JavaScript运行时环境和一种将 JavaScript调用转化为原生调用的机制。用JavaScript(或TypeScript,CoffeeScript等)语言编写应用,之后在安 卓平台用V8,在iOS和Windows Phone上用WebKit JavaScriptCore解释应用。然后,NativeScript运行时环境找到原生的目标API,将JS数据类型转化为相应的原生类型,然后调用原生API,并将得到的结果值返回,具体流程如下图所示:

    [​IMG]

    举例来说,在安卓平台上创建文件对象var file = new java.io.File(path);的步骤如下:


    • 用V8解释代码


    • 根据原数据确定相应的原生方法调用。原数据是在各个平台上预先构建的提供类型和方法签名的全部可用API集合。


    • 类型转换模块将JavaScript的String类型转换为一个java.lang.String对象


    • 运行时环境为java.io.File创建一个代理对象


    • 通过该代理将对原有JS File对象的调用委托给相应的Java实例

    据Telerik介绍,与纯原生代码相比NativeScript运行时环境会带来大概10%的性能损失。

    NativeScript可以将其所支持平台上的任意原生API作为目标,包括传感器接口API和用Objective C,Java或.NET编写的第三方库。UI组件是原生的,UI事件由在JavaScript代码中声明的原生处理程序处理,如View.OnClickListenerUIControl.addTarget

    为了避免开发者需要对三个支持的平台有深入的理解,该框架包含了一个抽象与原生代码连接的NativeScript模块层(NativeScript Modules Layer,NML), 可以自动将JavaScript调用转化为原生调用。NML包含如下模 块:Application,Camera,Color,Console,Data,File System,HTTP,Imaging,Local Settings,Location,Timer,UI。开发者并未受限于只能使用NML,也可以访问任意原生API。

    NativeScript其它一些功能简单列示如下:


    • 当前支持平台:iOS7+,安卓4.2+。预计将在4月实现Windows Phone的支持。对安卓早期版本的支持也将很快到来。


    • iOS平台的编译可以在远程完成,无需Mac电脑或iOS工具


    • 开发工作可以在任意IDE中完成。


    • 支持任意跨浏览器的JavaScript库。


    • 支持CSS。


    • 支持MVVM。


    • 即时支持新的原生平台。

    部分介绍来自 InfoQ
    NativeScript 1.5.0 发布,跨平台移动开发下载地址
     
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