译到IOS 5.0的设备上时，出现很多

warning:No copy of <No file name> found locally, reading from memory on remote device.  This may slow down the debug session.

warning:No copy of <No file name> found locally, reading from memory on remote device.  found).

warning:No copy of CoreGraphics.framework/CoreGraphics found locally, reading from memory on remote device.  This may slow down the debug session.

warning:Unable to read symbols for/Developer/Platforms/iPhoneOS.platform/DeviceSupport/4.2.1(8C148a)/Symbols/System/Library/Frameworks/Foundation.framework/Foundation(file not found).

warning:No copy of Foundation.framework/Foundation found locally, reading from memory on remote device.  This may slow down the debug session.

解决的办法是：

在开发机上把/Developer/Platforms/iPhoneOS.platform/DeviceSupport/把对应的IOS的目录删除