用户在5.0之前的iOS版本上定义的运行时属性

Question

我有一个现有的iOS项目，我正在维护，我需要升级到最新的Urban Airship SDK（5.0.2）。 该项目使用CocoaPods，因此下拉最新版本就像pod 'UrbanAirship-iOS-SDK', '~> 5.0.2' Podfile ，但是现在构建时，我收到下面的编译错误：

/* com.apple.ibtool.document.errors */
/%PATH%/Pods/UrbanAirship-iOS-SDK/Airship/UI/Default/Inbox/Resources/Shared/UAInboxMessageListCell.xib:3: error: User defined runtime attributes on iOS versions prior to 5.0 [6]
/%PATH%/Pods/UrbanAirship-iOS-SDK/Airship/UI/Default/Inbox/Resources/Shared/UAInboxMessageListCell.xib:ihY-21-382: error: User defined runtime attributes on iOS versions prior to 5.0 [6]
/%PATH%/Pods/UrbanAirship-iOS-SDK/Airship/UI/Default/Inbox/Resources/Shared/UAInboxMessageListCell.xib:10: error: User defined runtime attributes on iOS versions prior to 5.0 [6]
/%PATH%/Pods/UrbanAirship-iOS-SDK/Airship/UI/Default/Inbox/Resources/Shared/UAInboxMessageListCell.xib:20: error: User defined runtime attributes on iOS versions prior to 5.0 [6]
/%PATH%/Pods/UrbanAirship-iOS-SDK/Airship/UI/Default/Inbox/Resources/Shared/UAInboxMessageListCell.xib:wDW-QM-5ha: error: User defined runtime attributes on iOS versions prior to 5.0 [6]
/%PATH%/Pods/UrbanAirship-iOS-SDK/Airship/UI/Default/Inbox/Resources/Shared/UAInboxMessageListCell.xib:9: error: User defined runtime attributes on iOS versions prior to 5.0 [6]

在我看来，这不是Urban Airship问题，而是针对5.0之前的Pods项目，这很奇怪，因为部署目标设置为7.0（在实际项目和Pod上），运行iOS SDK 8.0（ Xcode 6.0.1），所以不确定5.0之前的地方会来自哪里。

任何想法/解决方案，甚至部分，将不胜感激。

Answer 1

打开UAInboxMessageListCell.xib文件并单击文件检查器，将build for更改build for iOS 5.0.2或更高版本