警告：没有<无文件名>的副本当地发现的
我正在使用 Xcode 4.2 并使用真实设备（iPod touch）进行调试。调试过程非常慢，每次运行调试时我都会在控制台中收到大量消息：
warning: No copy of <No file name> found locally, reading from memory on remote device. This may slow down the debug session.
[Switching to process 11523 thread 0x2d03]
warning: No copy of <No file name> found locally, reading from memory on remote device. This may slow down the debug session.
已编辑： iPod 上的 IOS 是 4.2.1。
I'm using Xcode 4.2 and use real device (iPod touch) for debugging. Debugging process is really slow and I get tons of messages in console every time I run debugging:
warning: No copy of <No file name> found locally, reading from memory on remote device. This may slow down the debug session.
[Switching to process 11523 thread 0x2d03]
warning: No copy of <No file name> found locally, reading from memory on remote device. This may slow down the debug session.
EDITED: IOS on iPod is 4.2.1.
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iPod 运行什么操作系统？我猜你的 Xcode 中没有 SDK，因此它必须从设备本身读取内容。将正确的 SDK 下载到 Xcode，情况就会有所改善。
What OS is the iPod running? I'm guessing it's one that you don't have the SDK for in Xcode, hence it's having to read things from the device itself. Download the right SDK to Xcode and things should improve.