网上大家都说是因为替换了系统的objextAtIndex方法，但是为了减少应用崩溃的可能，是要进行Hook的，所以不想取消Hook.

解决办法，关掉键盘进入后台。

- (void)applicationWillResignActive:(UIApplication *)application {    [[UIApplication sharedApplication].keyWindow endEditing:YES];}

-[UIKeyboardLayoutStar release]: message sent to deallocated instance