如何修复“自由形式大小模拟指标在Xcode 4.2之前不可用”警告？ [英] How can I fix "Freeform Size simulated metrics are not available prior to Xcode 4.2" warnings?

问题描述

几周以来，我一直在使用XCode 4.2和以前的XCode 3.x版本创建的项目。

Since a couple of weeks, I've been using XCode 4.2 with projects created with previous XCode 3.x versions.

创建一些自定义iPad视图时，我经常使用Interface Builder的freeform属性来获得任意大小的视图。

When creating some custom iPad views, I often use the "freeform" attribute of Interface Builder to be able to have views with an arbitrary size.

然后，我构建了以下构建警告：警告：属性不可用：自由形式大小模拟指标在Xcode 4.2之前不可用。

But then, I get build the following build warnings: "warning: Attribute Unavailable: Freeform Size simulated metrics are not available prior to Xcode 4.2."

我的问题是：如何修复这些警告？

My question is: how can I fix these warnings?

ps：首先，我认为这意味着我的项目不会向后兼容早期版本的XCode（根本不会打扰我）并尝试通过设置项目告诉Xcode格式化为XCode 4.2仅兼容。不幸的是，项目格式的下拉菜单仅建议XCode 3.2兼容和XCode 3.1兼容。

ps: First, I assumed it meant my project wouldn't be backward-compatible with earlier versions of XCode (which doesn't bother me at all) and tried to tell Xcode so, by setting the Project Format to XCode 4.2-compatible only. Unfortunately, the dropdown menu for the project format only suggests "XCode 3.2-compatible" and "XCode 3.1-compatible".

推荐答案

打开有问题的.xib文件并显示实用工具窗格。单击File Inspector选项卡，在Interface Builder Document下，您将看到一个Development字段。将其更改为Xcode 4.2。

Open the .xib file in question and show the Utilities pane. Click on the File Inspector tab and under Interface Builder Document you'll see a Development field. Change it to Xcode 4.2.

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