How to open UIUserNotificationSettings in any uiviewcontroller - ios

Question

Usually, I set UIUserNotificationSettings in Appdelegate.m
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
//some codes
UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeAlert
| UIUserNotificationTypeBadge
| UIUserNotificationTypeSound
categories:nil];
[application registerUserNotificationSettings:settings];
[application registerForRemoteNotifications];
return YES;
}
- (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken {
}
- (void)application:(UIApplication *)application didFailToRegisterForRemoteNotificationsWithError:(NSError *)error {
NSLog(#"Register Remote Notifications error:{%#}",[error localizedDescription]);
}
- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo {
NSLog(#"Receive remote notification : %#",userInfo);
}
but now I want to use it in a UIViewcontroller, such as there's a UIButton in a UIViewcontroller, when I click it, it will call this function, any ideas?

Answer 1

Try this one:
- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo {
NSLog(#"Receive remote notification : %#",userInfo);
YourViewController *login=[storyboard instantiateViewControllerWithIdentifier:#"YourViewContollerIDName"];
MainNavigationViewController *mainNavigation=[storyboard instantiateViewControllerWithIdentifier:#"MainNavigationViewController"];
[mainNavigation setViewControllers:#[login] animated:NO];
self.window.rootViewController=mainNavigation;
}
OR
Appdelegate.m
- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo {
NSLog(#"Receive remote notification : %#",userInfo);
[[NSNotificationCenter defaultCenter]postNotificationName:#"Notification" object:self userInfo:userInfo];
}
YourViewContoller.m
-(void)viewWillAppear:(BOOL)animated{
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(receiveNotification:)
name:#"Notification"
object:nil];
}
- (void)receiveNotification:(NSNotification *) notification{
if ([[notification name] isEqualToString:#"Notification"]) {
//call your function
}
[[NSNotificationCenter defaultCenter] removeObserver:self];
}

Answer 2

You do basically the same thing as a reaction to pressing the button, just use UIApplication.shared instead of using application provided by AppDelegate, so e.g. (Swift syntax):
UIApplication.shared.registerForRemoteNotifications()
Moreover, I would recommend implementing your own custom UserNotificationManager :
class UserNotificationManager: NSObject, UNUserNotificationCenterDelegate { ... }

Answer 3

I hope below code helps you,
create a new class called UIUserNotifications, and add the following code to the .h file
#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
#interface UIUserNotificationsHandler : NSObject
+ (void)registerUserNotifications;
#end
and following code to the .m file. Then call that function from your ViewController class
#import "UIUserNotificationsHandler.h"
#implementation UIUserNotificationsHandler
+ (void)registerUserNotifications{
UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeAlert
| UIUserNotificationTypeBadge
| UIUserNotificationTypeSound
categories:nil];
[[UIApplication sharedApplication] registerUserNotificationSettings:settings];
[[UIApplication sharedApplication] registerForRemoteNotifications];
}
#end