我已经呆了好几个小时了,据说我已经按照应有的方式行事了,但是当应用程序中的通知关闭时,它没有调用我的userNotificationCenter:(UNUserNotificationCenter *)center willPresentNotification:(UNNotification *)notification withCompletionHandler:(void (^)(UNNotificationPresentationOptions options))方法,什么也没有发生。

如果不在应用程序中,则应用程序会按预期发出通知,而在未处于使用状态时,则不会发出通知。

这是我的代码,如果您看到我做错了什么,请告诉我。

类NotificationDelegate.h:

#import <UIKit/UIKit.h>
#import <UserNotifications/UserNotifications.h>

@interface NotificationDelegate : UNUserNotificationCenter <UNUserNotificationCenterDelegate>

- (void)userNotificationCenter:(UNUserNotificationCenter *)center
   willPresentNotification:(UNNotification *)notification
     withCompletionHandler:(void (^)(UNNotificationPresentationOptions))completionHandler;

- (void)userNotificationCenter:(UNUserNotificationCenter *)center
didReceiveNotificationResponse:(UNNotificationResponse *)response
     withCompletionHandler:(void (^)())completionHandler;

@end


NotificationDelegate.m:

#import "NotificationDelegate.h"

@implementation NotificationDelegate


//Called when a notification is delivered to a foreground app.
-(void)userNotificationCenter:(UNUserNotificationCenter *)center
      willPresentNotification:(UNNotification *)notification
        withCompletionHandler:(void (^)(UNNotificationPresentationOptions options))completionHandler{

    NSLog(@"User Info : %@",notification.request.content.userInfo);
    [self sendMessage:[UIApplication sharedApplication] message:notification.request.content];
    completionHandler(UNAuthorizationOptionSound | UNAuthorizationOptionAlert | UNAuthorizationOptionBadge);
}

- (void) sendMessage:(UIApplication *)application message:(UNNotificationContent *)content{
    UIAlertController *ac = [UIAlertController alertControllerWithTitle:content.title
                                                   message:content.body
                                                     preferredStyle:UIAlertControllerStyleAlert];

    UIAlertAction *action = [UIAlertAction actionWithTitle:@"Go Away!" style:UIAlertActionStyleDefault handler:nil];

    [ac addAction:action];

    dispatch_async(dispatch_get_main_queue(), ^{
        [application.keyWindow.rootViewController presentViewController:ac animated:YES completion:nil];
    });
}

//Called to let your app know which action was selected by the user for a given notification.
-(void)userNotificationCenter:(UNUserNotificationCenter *)center
didReceiveNotificationResponse:(UNNotificationResponse *)response
        withCompletionHandler:(void(^)())completionHandler{
    NSLog(@"User Info : %@",response.notification.request.content.userInfo);
}

@end


AppDelegate.h:

#import <UIKit/UIKit.h>
#import "NotificationDelegate.h"
@import UserNotifications;

@interface AppDelegate : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) UNUserNotificationCenter *center;

@property (strong, nonatomic) NotificationDelegate *ncdel;

@property (strong, nonatomic) UIWindow *window;

@end


AppDelegate.m:

#import "AppDelegate.h"
@import UserNotifications;

@interface AppDelegate ()

@end

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    self.center = [UNUserNotificationCenter currentNotificationCenter];
    self.center.delegate = self.ncdel;
    return YES;
}


ViewController.m:

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    self.pvHelper = [[PickerViewHelperViewController alloc] init];
    self.pickerView.dataSource = self.pvHelper;
    self.pickerView.delegate = self.pvHelper;
    self.pvHelper.answer = [NSNumber numberWithInteger:10];

}

- (void) requestPermission{
    UNAuthorizationOptions options = UNAuthorizationOptionAlert + UNAuthorizationOptionSound + UNAuthorizationOptionBadge;
    UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter];
    [center requestAuthorizationWithOptions:options
                          completionHandler:^(BOOL granted, NSError * _Nullable error) {
                              if (!granted) {
                                  NSLog(@"Something went wrong");
                              }
                          }];
}


- (void) createNotification:(NSNumber *)time{
    UNMutableNotificationContent *content = [[UNMutableNotificationContent alloc] init];
    content.title = [NSString localizedUserNotificationStringForKey:@"Alarming, isn't it?" arguments:nil];
    content.body = [NSString localizedUserNotificationStringForKey:@"Listen to me my love" arguments:nil];
    content.sound = [UNNotificationSound defaultSound];
    content.badge = [NSNumber numberWithInteger:99];

    UNTimeIntervalNotificationTrigger *trigger = [UNTimeIntervalNotificationTrigger triggerWithTimeInterval:[time integerValue]
                                                                                                    repeats:NO];

    //Note: Calling addNotificationRequest with the same identifier string will replace the existing notification. If you want to schedule multiple requests use a different identifier each time.
    NSString *identifier = @"Alarm Triggered";
    UNNotificationRequest *req = [UNNotificationRequest requestWithIdentifier:identifier content:content trigger:trigger];
    UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter];
    [center addNotificationRequest:req withCompletionHandler:^(NSError * _Nullable error) {
        if(error != nil){
            NSLog(@"Something went wrong: %@", error);
        }
        else{
            NSLog(@"I have requested the Notification be made");
        }

    }];




}

- (IBAction)buttonTappedSetAlarm:(id)sender {
    [self requestPermission];

    [self createNotification: [[self pvHelper] answer]];
}


无关紧要,但是我的单视图应用程序仅具有10、20、30 ... 60秒,分钟,小时的选择器,我通过数学运算来获取请求时间。

因此,就像我说的那样,请求按预期在应用程序外部工作,但是在应用程序处于前台的情况下,什么也没有发生,这真的使我感到困扰。

任何帮助将不胜感激。

最佳答案

我想出了办法。

我摆脱了尝试在另一个类中实现UNUserNotificationCenterDelegate的问题,只是在我的View Controller中实现了它:

#import <UIKit/UIKit.h>
#import "PickerViewHelperViewController.h"
@import UserNotifications;

@interface ViewController : UIViewController <UNUserNotificationCenterDelegate>

@property (weak, nonatomic) IBOutlet UIPickerView *pickerView;

@property (strong, nonatomic) PickerViewHelperViewController *pvHelper;

// Two methods needed to implement from the UNUserNotificationCenterDelegate
- (void)userNotificationCenter:(UNUserNotificationCenter *)center
       willPresentNotification:(UNNotification *)notification
         withCompletionHandler:(void (^)(UNNotificationPresentationOptions))completionHandler;

- (void)userNotificationCenter:(UNUserNotificationCenter *)center
didReceiveNotificationResponse:(UNNotificationResponse *)response
         withCompletionHandler:(void (^)())completionHandler;

@end


然后只需在我的.m文件中包含随附的代码即可呈现本地通知。

- (void) sendMessage:(UIApplication *)application title:(NSString *)title message:(NSString *)message{
    UIAlertController *ac = [UIAlertController alertControllerWithTitle:title
                                                                message:message
                                                         preferredStyle:UIAlertControllerStyleAlert];

    UIAlertAction *action = [UIAlertAction actionWithTitle:@"Go Away!" style:UIAlertActionStyleDefault handler:nil];

    [ac addAction:action];

    dispatch_async(dispatch_get_main_queue(), ^{
        [application.keyWindow.rootViewController presentViewController:ac animated:YES completion:^{
            application.applicationIconBadgeNumber = 0;
        }];
    });
}

//Called when a notification is delivered to a foreground app.
-(void)userNotificationCenter:(UNUserNotificationCenter *)center
      willPresentNotification:(UNNotification *)notification
        withCompletionHandler:(void (^)(UNNotificationPresentationOptions options))completionHandler{

    NSLog(@"User Info : %@",notification.request.content.userInfo);
    [self sendMessage:[UIApplication sharedApplication] title:@"local notification within App" message:notification.request.content.body];
    completionHandler(UNAuthorizationOptionSound | UNAuthorizationOptionBadge);
}

//Called when a notification is delivered to a background app.
-(void)userNotificationCenter:(UNUserNotificationCenter *)center
didReceiveNotificationResponse:(UNNotificationResponse *)response
        withCompletionHandler:(void(^)())completionHandler{
    NSLog(@"User Info : %@",response.notification.request.content.userInfo);
    [self sendMessage:[UIApplication sharedApplication]
                title:@"I habe been opened from outside the App"
              message:response.notification.request.content.body];
    completionHandler(UNAuthorizationOptionSound | UNAuthorizationOptionAlert | UNAuthorizationOptionBadge);
}


我的创建通知并要求上面的许可方法在代码中保持不变。

这允许本地通知出现在应用程序中,并且允许通过通知打开应用程序时显示通知。

关于ios - 显示基于UNUserNotification iOS的UIAlertAction无法正常工作,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/44169935/

10-12 14:46