调试时从后台删除应用程序
我正在 iOS 4 及更高版本中调试我的应用程序的一个问题，该问题在关闭时似乎不会保存进度。我正在使用 Xcode 4.0 并在模拟器中运行它，当我在模拟器中关闭应用程序时，将其从后台应用程序栏中删除，然后从模拟器中重新启动它，它似乎在下面的 retval 行中中断
int main(int argc, char *argv[]) {
NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
int retVal = UIApplicationMain(argc, argv, nil, nil);
[pool release];
return retVal;
}
：引用“线程 1：程序收到信号：“SIGKILL”，我不太确定该怎么做（而且我刚刚开始使用 Xcode 4）。
有人可以解释一下这里发生了什么吗？我是否可以一旦我将应用程序放在后台（和/或删除它），就不会进行调试，或者这是否可能表明我的保存进度问题？我基本上在我的主要委托收到时触发保存：
- (void)applicationWillTerminate:(UIApplication *)application
I am debugging an issue for my app in iOS 4 and above where it doesn't appear to save progress when it's closed. I'm using Xcode 4.0 and running it in the simulator, and, when I close the app in the simulator, remove it from the background apps bar, then relaunch it from the simulator, it appears to break in the retval line below:
int main(int argc, char *argv[]) {
NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
int retVal = UIApplicationMain(argc, argv, nil, nil);
[pool release];
return retVal;
}
It cites "Thread 1: Program received signal: "SIGKILL" and I'm not quite sure what to make of it (also I'm just minutes new to using Xcode 4).
Can someone explain what's going on here, whether I simply can't debug once I stick an app in background (and/or remove it), or whether this potentially points to my issue with saving progress? I basically trigger the save when my main delegate receives:
- (void)applicationWillTerminate:(UIApplication *)application
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您应该保存在
applicationDidEnterBackground:中，而不是applicationWillTerminate:中。当后台应用程序关闭时，它会被终止，而不发送applicationWillTerminate:（这是您收到的 SIGKILL）。但是，如果您支持没有多任务处理的设备或版本，则还需要在applicationWillTerminate:中保存，因为它在这些情况下使用。You should save in
applicationDidEnterBackground:, notapplicationWillTerminate:. When an app in the background is closed, it is killed without sendingapplicationWillTerminate:(this is the SIGKILL you are getting). However, if you are supporting devices or versions without multitasking, you will need to save inapplicationWillTerminate:also, since it is used in those circumstances.