If you're building from Unity3D 5 and also using a Prime31 plugin and you're getting this error it's probably due to a duplicate .dll. If you look through your warnings in Unity's editor one of them will tell you this and warn that it could cause build errors. To see if this is the case, type P31 in your project search field and it should pop right up, maybe even more than one. The duplicate's will have a ' 1' at the end of the file name. This is probably caused from updating the plugin in editor via the store or the Prime31 menu tab.

昨晚我遇到了一个类似的问题，这个问题与我在Xcode中从Finder拖拽一个类有关。

解决方案是选择Build Phases选项卡，然后选择Compile Sources，并确保将类拖到列表中。

在Xcode版本6.3.2中，我通过添加Library解决了完全相同的问题 libxml2。Dylib和libz。在链接二进制与库!

这解决了我的问题:我正在使用的依赖不支持armv7。所以我别无选择，只能把它切除。Armv7只用于非常老的iphone(比如iphone 4)。

点击“构建设置/全部” 设置“有效架构”为“arm64 arm64e”

我还通过拖放添加了文件。我所做的，我删除了所有文件的引用(不包括框架)，然后通过添加文件到项目选项正确地添加它们，问题消失了。

如果您在释放模式下构建您的Flutter项目时遇到了这个问题-这对我有帮助:

Set your build system to New Build System in File > Project Settings… delete folders ios and build_ios from your project folder. create ios module by executing flutter create . from your project folder. open Xcode and: set the IOS Deployment Target to at least 9.0 in PROJECT > Runner check your Signing & Capabilities make sure your Build Configuration is set to Release in Edit Scheme... and build for Generic iOS Device execute pod install from your project folder execute flutter pub get from your project folder

现在打开你的Xcode并构建或存档它:Product > build(或archive)