weex的Debug总结

Q1：模拟器正常显示，iOS真机不显示，Xcode输出如下

 WeexDemo[1424:1061554] [fg100,149,237; <Weex>[info]WXBridgeContext.m:265, No send queue for instance:0, may it has been destroyed so method:fireEvent is ignored [;**
 WeexDemo[1424:1061559] [fg255,0,0; <Weex>[error]WXUtility.m:206, Error Domain=NSCocoaErrorDomain Code=3840 "Invalid value around character 0." UserInfo={NSDebugDescription=Invalid value around character 0.} [;**
WeexDemo[1424:1061549] [fg255,0,0; <Weex>[error]WXUtility.m:206, Error Domain=NSCocoaErrorDomain Code=3840 "Invalid value around character 0." UserInfo={NSDebugDescription=Invalid value around character 0.} [;**

A1：由于native中CURRENT_IP 与电脑主机号不一致

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Q2: 使用repeat时，当数据源的个数没发生改变时，UI不会刷新?

我在使用repeat的基本方式去实现以下重复组件，发现当我的数据源length没有发生变化时，我的组件数据是不会被更新的。问题原因未知.

问题代码:

        <scroller style="width:{{scrollertWidth}}; height:{{deviceHeight}};" class="scroller">
            <div style="flex-direction:row;"> 
                <div repeat="{{children}}" >
                    <div class="subKind" style="width:{{subKindWidth}}; height:{{subKindWidth + 30}}" kindid="{{id}}" onclick="kindClicked">
                        //<img src="{{icon}}" class="img" style="width:{{imgWidth}}; height:{{imgWidth}}; border-radius:{{imgWidth/2.0}}; margin-left:{{paddingLeft}}">
                        <text class="subText" style="width:{{subKindWidth}}">{{name}}</text>
                    </div>
                </div>  
            </div>
        </scroller>

A2：使用了repeat的扩展方法 repeat="{{v in list}}",就可以自动刷新组件中的数据

新的代码：

        <scroller style="width:{{scrollertWidth}}; height:{{deviceHeight}};" class="scroller">
            <div style="flex-direction:row;"> 
                <div repeat="{{v in children}}" >
                    <div class="subKind" style="width:{{subKindWidth}}; height:{{subKindWidth + 30}}" kindid="{{v.id}}" onclick="kindClicked">
                        //<img src="{{v.icon}}" class="img" style="width:{{imgWidth}}; height:{{imgWidth}}; border-radius:{{imgWidth/2.0}}; margin-left:{{paddingLeft}}">
                        <text class="subText" style="width:{{subKindWidth}}">{{v.name}}</text>
                    </div>
                </div>  
            </div>
        </scroller>

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Q3: 使用weex init创建的项目，怎么只启动一次服务，然后每次修改we文件，只要commond + s然后refresh就可以看到最新的修改效果

A3: 想要达到保存+刷新就能得到效果，可以打开项目中package.json文件，查看里面的scripts脚本指令：

{
  "name": "toomaoweex",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "build": "webpack",
    "dev": "webpack --watch",
    "serve": "serve -p 8080",
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "babel-loader": "^6.2.5",
    "babel-plugin-transform-runtime": "^6.15.0",
    "babel-preset-es2015": "^6.14.0",
    "babel-runtime": "^6.11.6",
    "serve": "^1.4.0",
    "webpack": "^1.13.1",
    "weex-html5": "^0.3.0",
    "weex-loader": "^0.3.1"
  }
}

这时候就会发现，scripts提供了4个指令， 其中"dev": "webpack --watch"这个watch参数就表示可以监听，即当你每次保存的时候，都会自动编译的，我们只需要执行 npm run dev &即可，&是表示后台运行，然后再执行npm run serve &开启服务即可