App doesnt build to device

When i try to build my app to device, it gets stuck on the splash screen and doesn't get past it.

GNU gdb 6.3.50-20050815 (Apple version gdb-1702) (Mon Jun 20 02:29:40 UTC 2011)
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This GDB was configured as "--host=i386-apple-darwin --target=arm-apple-darwin".tty /dev/ttys000
warning: Unable to read symbols for /Developer/Platforms/iPhoneOS.platform/DeviceSupport/4.2.1 (8C148a)/Symbols/System/Library/Frameworks/CoreGraphics.framework/CoreGraphics (file not found).
warning: Unable to read symbols for /Developer/Platforms/iPhoneOS.platform/DeviceSupport/4.2.1 (8C148a)/Symbols/System/Library/Frameworks/AVFoundation.framework/AVFoundation (file not found).
warning: Unable to read symbols from "AVFoundation" (not yet mapped into memory).
warning: Unable to read symbols from "libSystem.B.dylib" (not yet mapped into memory).
warning: Unable to read symbols from "libgcc_s.1.dylib" (not yet mapped into memory).
warning: Unable to read symbols from "CoreFoundation" (not yet mapped into memory).
warning: Unable to read symbols from "libobjc.A.dylib" (not yet mapped into memory).
target remote-mobile /tmp/.XcodeGDBRemote-186-34
Switching to remote-macosx protocol
mem 0x1000 0x3fffffff cache
mem 0x40000000 0xffffffff none
mem 0x00000000 0x0fff none
[Switching to process 11523 thread 0x0]
[Switching to process 11523 thread 0x0]
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.  This may slow down the debug session.
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.  This may slow down the debug session.
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.
warning: Unable to read symbols for /Developer/Platforms/iPhoneOS.platform/DeviceSupport/4.2.1 (8C148a)/Symbols/System/Library/Frameworks/OpenGLES.framework/OpenGLES (file not found).
warning: No copy of OpenGLES.framework/OpenGLES 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/QuartzCore.framework/QuartzCore (file not found).
warning: No copy of QuartzCore.framework/QuartzCore 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/UIKit.framework/UIKit (file not found).
warning: Unable to read symbols for /Developer/Platforms/iPhoneOS.platform/DeviceSupport/4.2.1 (8C148a)/Symbols/System/Library/Frameworks/CoreMedia.framework/CoreMedia (file not found).
warning: No copy of CoreMedia.framework/CoreMedia found locally, reading from memory on remote device.  This may slow down the debug session.
warning: No copy of VideoToolbox.framework/VideoToolbox 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/PrivateFrameworks/Celestial.framework/Celestial (file not found).
warning: No copy of DataMigration.framework/DataMigrat开发者_Go百科ion 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/PrivateFrameworks/EAP8021X.framework/EAP8021X (file not found).
warning: No copy of EAP8021X.framework/EAP8021X found locally, reading from memory on remote device.  This may slow down the debug session.

Here's part of the logs. It just sits on the splash screen and I can't figure out why.

From the log you given, there is the warning- Unable to read symbols for /Developer/Platforms/iPhoneOS.platform/DeviceSupport/4.2.1 (8C148a)

you can have a look at this thread to solve it.

Issue with iphone sdk 4.2.1

Does it compile on the simulator? After a quick google, apparently this error comes from either a bug in the SDK or memory mismanagement.