ios - 应用程序在 iPod 上出现空白屏幕

Question

当我在 iPod 4G 上运行我的应用程序时，它只显示空白屏幕。这是日志:

run
Running…
[Switching to thread 11779]
[Switching to thread 11779]
Re-enabling shared library breakpoint 1
continue
objc[1014]: Class OutgoingMessage is implemented in both /System/Library/PrivateFrameworks/Message.framework/Message and /var/mobile/Applications/2930A145-7E61-4083-B893-FDBAE148FEF7/ABC.app/ABC. One of the two will be used. Which one is undefined.
objc[1014]: Class Message is implemented in both /System/Library/PrivateFrameworks/MIME.framework/MIME and /var/mobile/Applications/2930A145-7E61-4083-B893-FDBAE148FEF7/ABC.app/ABC. One of the two will be used. Which one is undefined.
Watchdog has expired.  Remote device was disconnected?  Debugging session terminated.
Watchdog has expired.  Remote device was disconnected?  Debugging session terminated.

The Debugger has exited due to signal 15 (SIGTERM).The Debugger has exited due to signal 15 (SIGTERM).

谁能帮我解决这个问题吗？这适用于 iPhone 4、iPhone 3gs 和 iPad1。

Answer 1

尝试运行示例代码，看看这是否是您的代码或设备的问题。如果问题出在您的代码上，请尝试逐步注释掉 didFinishLaunchingWithOptions

中的内容

还要注意类(例如MFMailComposeViewController)，在使用它们之前您必须检查其功能(例如canSendMail)