Nativescript iOS 6.4.2网格布局引发错误：undefined不是对象（计算'；this.rows[measureSpec.getRowIndex（）].children'；）

使用Nativescript angular时，出现以下错误：

File:node_modules/@nativescript/core/ui/layouts/grid layout/grid layout.ios.js:351:0:js错误类型错误：未定义不是对象（计算'this.rows[measureSpec.getRowIndex（）].children'）

这只适用于iOS 6.4.x和6.5.x，在Android上没有问题。客户端将使用以下堆栈进行分解：

JavaScript stack trace:
file: node_modules/@nativescript/core/ui/layouts/grid-layout/grid-layout.ios.js:351:0
at file: node_modules/@nativescript/core/ui/layouts/grid-layout/grid-layout.ios.js:113:0
at file: node_modules/@nativescript/core/ui/layouts/layout-base-common.js:136:0
at file: node_modules/@nativescript/core/ui/core/view/view-common.js:923:0
at file: node_modules/@nativescript/core/ui/layouts/layout-base-common.js:134:0
at file: node_modules/@nativescript/core/ui/layouts/layout-base-common.js:125:0
at file: node_modules/@nativescript/core/ui/layouts/layout-base-common.js:133:0
at file: node_modules/@nativescript/core/ui/layouts/grid-layout/grid-layout.ios.js:107:0
at file: node_modules/@nativescript/core/ui/core/view/view.ios.js:58:0
at file: node_modules/@nativescript/core/ui/core/view/view-helper/view-helper-common.js:26:0
at file: node_modules/@nativescript/core/ui/core/view/view-common.js:893:0
at file: node_modules/@nativescript/core/ui/content-view/content-view.js:74:0
at file: node_modules/@nativescript/core/ui/core/view/view.ios.js:58:0
at file: node_modules/@nativescript/core/ui/core/view/view-helper/view-helper-common.js:26:0
at file: node_modules/@nativescript/core/ui/core/view/view-common.js:893:0
at file: node_modules/@nativescript/core/ui/layouts/stack-layout/stack-layout.ios.js:52:0
at file: node_modules/@nativescript/core/ui/layouts/layout-base-common.js:136:0
at file: node_modules/@nativescript/core/ui/core/view/view-common.js:923:0
at file: node_modules/@nativescript/core/ui/layouts/layout-base-common.js:134:0
at file: node_modules/@nativescript/core/ui/layouts/layout-base-common.js:125:0
at file: node_modules/@nativescript/core/ui/layouts/layout-base-common.js:133:0
at file: node_modules/@nativescript/core/ui/layouts/stack-layout/stack-layout.ios.js:50:0
at file: node_modules/@nativescript/core/ui/core/view/view.ios.js:58:0
at file: node_modules/@nativescript/core/ui/core/view/view-helper/view-helper-common.js:26:0
at file: node_modules/@nativescript/core/ui/core/view/view-common.js:893:0
at file: node_modules/@nativescript/core/ui/layouts/stack-layout/stack-layout.ios.js:52:0
at file: node_modules/@nativescript/core/ui/layouts/layout-base-common.js:136:0
at file: node_modules/@nativescript/core/ui/core/view/view-common.js:923:0
at file: node_modules/@nativescript/core/ui/layouts/layout-base-common.js:134:0
at file: node_modules/@nativescript/core/ui/layouts/layout-base-common.js:125:0
at file: node_modules/@nativescript/core/ui/layouts/layout-base-common.js:133:0
at file: node_modules/@nativescript/core/ui/layouts/stack-layout/stack-layout.ios.js:50:0
at file: node_modules/@nativescript/core/ui/core/view/view.ios.js:58:0
at file: node_modules/@nativescript/core/ui/core/view/view-helper/view-helper-common.js:26:0
at file: node_modules/@nativescript/core/ui/core/view/view-common.js:893:0
at file: node_modules/nativescript-ui-sidedrawer/ui-sidedrawer.ios.js:270:0
at file: node_modules/@nativescript/core/ui/core/view/view.ios.js:58:0
at file: node_modules/@nativescript/core/ui/core/view/view-helper/view-helper-common.js:26:0
at layoutView(file: node_modules/@nativescript/core/ui/core/view/view-helper/view-helper.ios.js:64:0)
at file: node_modules/@nativescript/core/ui/core/view/view-helper/view-helper.ios.js:217:0
at UIApplicationMain([native code])
at run(file: node_modules/@nativescript/core/application/application.ios.js:312:0)
at file: node_modules/@nativescript/angular/platform-common.js:210:0
at file: node_modules/@nativescript/angular/platform-common.js:111:0
at file: node_modules/@nativescript/angular/platform-common.js:91:0
at file:///app/bundle.js:9245:144
at ./main.tns.ts(file:///app/bundle.js:9250:34)

有人见过这样的东西吗？有办法解决这个问题吗？不要用以下方式掩盖它：

“discardUncaughtJsExceptions”：true

---

欢迎任何输入或想法。

我们将故障原因追溯到网格上的一个

，该网格将行值设置为未定义

虽然这是我们代码中的一个bug，但有趣的是，在Android上这不会导致问题，并且被解释为row=“0”，而在iOS上这会导致异常

---

如果两个平台上的行为相同，那就太好了。

如果您有一个复制该问题的示例项目，请与我联系，以便我可以进一步调查。

<GridLayout>
   <Image [row]="undefined" ....></Image>
</GridLayout>