调试输出提到我应该要求Application Badge权限 [英] Debug output mentions I should ask for Application Badge permission

问题描述

我做了一个非常简单的应用程序，可以在计时器运行时在后台运行。如果应用程序仍在后台并且计时器结束，它将发送本地通知并将应用程序徽章设置为1.当我启动应用程序时，我总是清除它。我注意到安装Xcode 6后，每次启动应用程序时都收到此消息：

I made a very simple app that can run in the background while a timer runs. If the app is still in the background and the timer ends it will send a local notification and set the application badge to 1. When I start the app I always clear it. I noticed that after installing Xcode 6 I was getting this message every time I started the app:

尝试标记应用程序图标但未获得用户的许可标记应用程序

"Attempting to badge the application icon but haven't received permission from the user to badge the application"

显然，我的应用程序会将徽标设置为0以清除它。我在哪里设置这些权限或请求它们？它现在被视为推送通知吗？

Clearly that text is generated by my app setting the badge to 0 to clear it. Where do I set these permissions or request them? Is it now regarded as a push notification?

问题已修复，答案如下。最重要的是，您需要获得用户对任何类型通知的确认，而过去通常只对推送通知确认。

The problem has been fixed and the answer is posted below. The bottom line is that you need to get confirmation from the user for any kind of notification, while that used to be true only for push notifications.

推荐答案

我最终没有使用应用程序徽章，我放弃了我在这里发布的初始代码片段。由于仍然有人在阅读和评论这个问题，我也会在这里添加我当前的工作解决方案。它包含对iOS7的检查，但我不使用回调方法。此版本不再仅仅要求申请许可证了。

I ended up not using the Application Badge at all and I abandoned the initial code snippet that I have posted here in the mean while. Since there are still people reading and commenting on this question I will add my working current solution here as well. It does contains checks for iOS7 but I do not use the callback method. Also this version doesn't just ask for Application Badge permission anymore.

UIUserNotificationSettings* notificationSettings = [UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeBadge categories:nil];
[[UIApplication sharedApplication] registerUserNotificationSettings:notificationSettings];

这就是我现在使用的

.h文件

This is what I use now

.h file

#import <Foundation/Foundation.h>

@interface NotificationPermissionHandler : NSObject

+ (void)checkPermissions;
+ (bool)canSendNotifications;

@end

.m文件：

#import "NotificationPermissionHandler.h"

@implementation NotificationPermissionHandler

static const UIUserNotificationType USER_NOTIFICATION_TYPES_REQUIRED = UIUserNotificationTypeAlert | UIUserNotificationTypeSound;
static const UIRemoteNotificationType REMOTE_NOTIFICATION_TYPES_REQUIRED = UIRemoteNotificationTypeAlert | UIRemoteNotificationTypeSound;

+ (void)checkPermissions;
{
    bool isIOS8OrGreater = [[UIApplication sharedApplication] respondsToSelector:@selector(registerUserNotificationSettings:)];
    if (!isIOS8OrGreater)
    {
        [NotificationPermissionHandler iOS7AndBelowPermissions];
        return;
    }

    [NotificationPermissionHandler iOS8AndAbovePermissions];
}

+ (void)iOS7AndBelowPermissions
{
    [[UIApplication sharedApplication] registerForRemoteNotificationTypes:REMOTE_NOTIFICATION_TYPES_REQUIRED];
}

+ (void)iOS8AndAbovePermissions;
{
    if ([NotificationPermissionHandler canSendNotifications])
    {
        return;
    }

    UIUserNotificationSettings* requestedSettings = [UIUserNotificationSettings settingsForTypes:USER_NOTIFICATION_TYPES_REQUIRED categories:nil];
    [[UIApplication sharedApplication] registerUserNotificationSettings:requestedSettings];
}

+ (bool)canSendNotifications;
{
    UIApplication *application = [UIApplication sharedApplication];
    bool isIOS8OrGreater = [application respondsToSelector:@selector(currentUserNotificationSettings)];

    if (!isIOS8OrGreater)
    {
        // We actually just don't know if we can, no way to tell programmatically before iOS8
        return true;
    }

    UIUserNotificationSettings* notificationSettings = [application currentUserNotificationSettings];
    bool canSendNotifications = notificationSettings.types == USER_NOTIFICATION_TYPES_REQUIRED;

    return canSendNotifications;
}

@end

这是我的第一个解决方案

我保留它作为初步讨论的参考。不维护此代码。

This was my first solution

I kept it just as a reference for to the initial discussion. This code is not maintained.

UIUserNotificationSettings* notificationSettings = [UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeBadge];
[[UIApplication sharedApplication] registerUserNotificationSettings:notificationSettings];

您还可以通过以下方式将权限堆叠到一个请求中：

You can also stack permissions into one request by doing this:

UIUserNotificationSettings* notificationSettings = [UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeAlert | UIUserNotificationTypeBadge | UIUserNotificationTypeSound categories:nil];
[[UIApplication sharedApplication] registerUserNotificationSettings:notificationSettings];

此外，自iOS 8起，可以确定用户允许的警报类型：

Also since iOS 8 it's possible to figure out what kind of alerts are allowed by the user:

UIUserNotificationSettings* notificationSettings = [[UIApplication sharedApplication] currentUserNotificationSettings];
if (notificationSettings.types == UIUserNotificationTypeBadge)
{
     // change the badge
}

我最终使用此代码：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    if (![defaults objectForKey:@"first_run"])
    {
        [self setDefaults];
    }

    [self askAlertPermissions];

    if ([self canChangeBadge])
    {
         [self setBadge:0];
    }

    return YES;
}

- (void)setDefaults;
{
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];

    [defaults setObject:[NSNumber numberWithBool:NO] forKey:@"alerts_allowed"];
    [defaults setObject:[NSDate date] forKey:@"first_run"];
    // More defaults if needed

    [defaults synchronize];
}

- (void)askAlertPermissions;
{
    UIUserNotificationSettings* notificationSettings = [UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeAlert | UIUserNotificationTypeBadge | UIUserNotificationTypeSound categories:nil];
    [[UIApplication sharedApplication] registerUserNotificationSettings:notificationSettings];
}

// This will be called only after confirming your settings
- (void)application:(UIApplication *)application didRegisterUserNotificationSettings:(UIUserNotificationSettings *)notificationSettings;
{
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    // There is also a built in method to find out if the user has appropriate settings, you might want to use that instead if you just want to know what the setting is
    [defaults setObject:[NSNumber numberWithBool:YES] forKey:@"alerts_allowed"];
}

- (bool)canChangeBadge;
{
    UIUserNotificationSettings* notificationSettings = [[UIApplication sharedApplication] currentUserNotificationSettings];
    return notificationSettings.types == UIUserNotificationTypeBadge;
}

更多信息：

https://developer.apple.com /library/content/releasenotes/General/WhatsNewIniOS/Articles/iOS8.html

https://developer.apple.com/documentation/uikit/uiapplication

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