我正在编程一个iPhone应用程序,我需要强制它退出由于某些用户操作。在清理应用程序分配的内存后,调用什么方法来终止应用程序?
当前回答
苹果说:
警告:不要调用exit函数。调用exit的应用程序将在用户看来已经崩溃,而不是执行优雅的终止并动画返回主屏幕。”
我认为这是一个错误的假设。如果用户点击退出按钮,出现类似“应用程序现在将退出”这样的消息,它似乎没有崩溃。苹果应该提供退出应用程序的有效方法(而不是exit(0))。
其他回答
您是否尝试过exit(0)?
或者,[[NSThread主线程]退出],虽然我没有尝试,这似乎是更合适的解决方案。
苹果说:
警告:不要调用exit函数。调用exit的应用程序将在用户看来已经崩溃,而不是执行优雅的终止并动画返回主屏幕。”
我认为这是一个错误的假设。如果用户点击退出按钮,出现类似“应用程序现在将退出”这样的消息,它似乎没有崩溃。苹果应该提供退出应用程序的有效方法(而不是exit(0))。
用home键以外的其他方式退出应用程序真的不是ios风格的方法。
我做了这个助手,虽然,没有使用私人的东西:
void crash()
{ [[NSMutableArray new] addObject:NSStringFromClass(nil)]; }
但对我来说还是不适合生产。它用于测试崩溃报告,或在核心数据重置后快速重新启动。只是使它安全不被拒绝,如果功能留在生产代码。
- (IBAction)logOutButton:(id)sender
{
//show confirmation message to user
CustomAlert* alert = [[CustomAlert alloc] initWithTitle:@"Confirmation" message:@"Do you want to exit?" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"OK", nil];
alert.style = AlertStyleWhite;
[alert setFontName:@"Helvetica" fontColor:[UIColor blackColor] fontShadowColor:[UIColor clearColor]];
[alert show];
}
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (buttonIndex != 0) // 0 == the cancel button
{
//home button press programmatically
UIApplication *app = [UIApplication sharedApplication];
[app performSelector:@selector(suspend)];
//wait 2 seconds while app is going background
[NSThread sleepForTimeInterval:2.0];
//exit app when app is in background
NSLog(@"exit(0)");
exit(0);
}
}
点击这里查看问答:https://developer.apple.com/library/content/qa/qa1561/_index.html
Q: How do I programmatically quit my iOS application? There is no API provided for gracefully terminating an iOS application. In iOS, the user presses the Home button to close applications. Should your application have conditions in which it cannot provide its intended function, the recommended approach is to display an alert for the user that indicates the nature of the problem and possible actions the user could take — turning on WiFi, enabling Location Services, etc. Allow the user to terminate the application at their own discretion. WARNING: Do not call the exit function. Applications calling exit will appear to the user to have crashed, rather than performing a graceful termination and animating back to the Home screen. Additionally, data may not be saved, because -applicationWillTerminate: and similar UIApplicationDelegate methods will not be invoked if you call exit. If during development or testing it is necessary to terminate your application, the abort function, or assert macro is recommended
推荐文章
- 如何删除默认的导航栏空间在SwiftUI导航视图
- 如何在iOS中使用Swift编程segue
- Swift -整数转换为小时/分钟/秒
- Swift:声明一个空字典
- 为什么ARC仍然需要@autoreleasepool ?
- 在成功提交我的应用程序后,“太多符号文件”
- 首先添加一个UIView,甚至是导航栏
- 我如何改变UIButton标题颜色?
- 如何从UIImage (Cocoa Touch)或CGImage (Core Graphics)获取像素数据?
- 在Swift中如何调用GCD主线程上的参数方法?
- NSLayoutConstraints是可动画的吗?
- iOS -构建失败,CocoaPods无法找到头文件
- Xcode 4挂在“附加到(应用程序名称)”
- CFNetwork SSLHandshake iOS 9失败
- 请求失败:不可接受的内容类型:文本/html使用AFNetworking 2.0