iOS开发之注册推送通知权限

1、首先在工程设置开启通知权限（Push Notifications开关打开）

2、注册通知权限，在此步骤会弹出用户授权提示

#import <UserNotifications/UserNotifications.h>

if ([[UIDevice currentDevice].systemVersion floatValue] >= 10.0){
        if (@available(iOS 10.0, *)) {
            UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter];
            __weak typeof(self) weakSelf = self;
            [center requestAuthorizationWithOptions:(UNAuthorizationOptionAlert | UNAuthorizationOptionBadge | UNAuthorizationOptionSound) completionHandler:^(BOOL granted, NSError * _Nullable error) {
                if (granted) {
                    [center getNotificationSettingsWithCompletionHandler:^(UNNotificationSettings * _Nonnull settings) {
                        if (settings.authorizationStatus == UNAuthorizationStatusAuthorized){
                            dispatch_async(dispatch_get_main_queue(), ^{
                                [[UIApplication sharedApplication] registerForRemoteNotifications];
                            });
                        }
                    }];
                }
            }];
        }
    } else if ([[UIDevice currentDevice].systemVersion floatValue] >= 8.0){
        if (@available(iOS 8.0, *)) {
            if ([[UIApplication sharedApplication] respondsToSelector:@selector(registerUserNotificationSettings:)]) {
                UIUserNotificationSettings* notificationSettings = [UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeAlert | UIUserNotificationTypeBadge | UIUserNotificationTypeSound categories:nil];
                [[UIApplication sharedApplication] registerUserNotificationSettings:notificationSettings];
                [[UIApplication sharedApplication] registerForRemoteNotifications];
            } else {
                [[UIApplication sharedApplication] registerForRemoteNotificationTypes: (UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeSound | UIRemoteNotificationTypeAlert)];
            }
        }
    }

注意iOS8.0和iOS10.0之后需要用不同的方法

3、获取到远程推送的token值

在Appdelegate类中重写下面的方法

- (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken
{
    NSString *token = [NSString stringWithFormat:@"%@",deviceToken];
    token = [token stringByReplacingOccurrencesOfString:@"<" withString:@""];
    token = [token stringByReplacingOccurrencesOfString:@">" withString:@""];
    token = [token stringByReplacingOccurrencesOfString:@" " withString:@""];
}

 获取到token值之后妥善保存，并传给服务器，服务器根据token值就可以通过APNS给app发送远程推送通知了啦。