IOS 9 不请求远程通知权限

Question

我在尝试请求远程通知权限时遇到问题。

它在 iOS 10 上完美运行，但当我尝试在 iOS 9 设备上运行时，它没有显示任何警报，并且 UIApplication 委托(delegate)方法“application:didRegisterForRemoteNotificationsWithDeviceToken:”未被调用。既不是“失败”的方法。

我只在真实设备上测试，而不是模拟器。我目前用于请求许可的代码如下:

-(void)requestPushPermissions {
NSLog(@"Starting register for remote Notification");
UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes: UIUserNotificationTypeAlert | UIUserNotificationTypeBadge | UIUserNotificationTypeSound categories:nil];
if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 10.0) {
    [[UNUserNotificationCenter currentNotificationCenter] requestAuthorizationWithOptions:UNAuthorizationOptionAlert | UNAuthorizationOptionBadge | UNAuthorizationOptionSound completionHandler:^(BOOL granted, NSError * _Nullable error) {
        if (granted) {
            NSLog(@"Got a yes!");
        }
        else {
            NSLog(@"Got a no...");
        }
    }];
    [[UIApplication sharedApplication] registerForRemoteNotifications];
}
else {
    [[UIApplication sharedApplication] registerUserNotificationSettings:settings];
    [[UIApplication sharedApplication] registerForRemoteNotifications];
}
}

有人知道吗？

Answer 1

试试这段代码

#import "AppDelegate.h"

#define SYSTEM_VERSION_GRATERTHAN_OR_EQUALTO(v)  ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] != NSOrderedAscending)

@interface AppDelegate ()

@end

@implementation AppDelegate


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.

    [self registerForRemoteNotification];

    return YES;
}
    - (void)registerForRemoteNotification {
        if(SYSTEM_VERSION_GRATERTHAN_OR_EQUALTO(@"10.0")) {
            UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter];
            center.delegate = self;
            [center requestAuthorizationWithOptions:(UNAuthorizationOptionSound | UNAuthorizationOptionAlert | UNAuthorizationOptionBadge) completionHandler:^(BOOL granted, NSError * _Nullable error){
                if( !error ){
                    [[UIApplication sharedApplication] registerForRemoteNotifications];
                }
            }];
        }
        else {
            [[UIApplication sharedApplication] registerUserNotificationSettings:[UIUserNotificationSettings settingsForTypes:(UIUserNotificationTypeSound | UIUserNotificationTypeAlert | UIUserNotificationTypeBadge) categories:nil]];
            [[UIApplication sharedApplication] registerForRemoteNotifications];
        }
    }

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