实用知识：关于通知里面的 category 使用方法

#import "AppDelegate.h"
#import "MyNotificationDefine.h"

@interface AppDelegate ()

@end

@implementation AppDelegate

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

/*================= UIMutableUserNotificationCategory =================*/
// categories 配置 通知的类别, (有多少种样式的通知)
// 通知弹窗的样式, 必须先注册, 才能使用
// 注意: 使用Mutable类型的category
// 1. 实例化
UIMutableUserNotificationCategory *category = [[UIMutableUserNotificationCategory alloc] init];
// identifier是唯一标识, 通知会使用该ID来匹配相关的样式
category.identifier = MyUserNotificationCategoryStyleIdentifier;

/*================= UIMutableUserNotificationAction =================*/
// category上的按钮
UIMutableUserNotificationAction *action = [[UIMutableUserNotificationAction alloc] init];
// action的identifier用来在代理当中区分是哪个按钮触发
action.identifier = @"Action1";

// 配置相关参数
/**
UIUserNotificationActivationModeForeground, // 点击通知后, 会跳转到App当中, 也会触发代理方法
UIUserNotificationActivationModeBackground  //  点击了通知后, 不会跳转到App当中, 但是会触发代理方法
*/
action.activationMode = UIUserNotificationActivationModeBackground;
action.title = @"进入后台";

// 将action添加到category当中
[category setActions:@[action] forContext:UIUserNotificationActionContextDefault];

/*================= 注册配置 =================*/
NSSet *set = [NSSet setWithObject:category];
// 注册通知的配置 (包含授权)
UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeAlert | UIUserNotificationTypeSound | UIUserNotificationTypeBadge categories:set];

[[UIApplication sharedApplication] registerUserNotificationSettings:settings];

return YES;
}

// iOS8.0后
//- (void)application:(UIApplication *)application handleActionWithIdentifier:(NSString *)identifier forLocalNotification:(UILocalNotification *)notification completionHandler:(void (^)())completionHandler
//{
//
//}

// iOS9.0后
// 如果实现了该方法, 上面失效
- (void)application:(UIApplication *)application handleActionWithIdentifier:(NSString *)identifier forLocalNotification:(UILocalNotification *)notification withResponseInfo:(NSDictionary *)responseInfo completionHandler:(void (^)())completionHandler
{
NSLog(@"%@ : %@", identifier, responseInfo);

//    if (identifier isEqualToString:@"Action1") {
//        做相关处理
//    }

// 当执行完Action的相关代码时, 注意要执行CompletionHandler
completionHandler();
}

@end

#import "ViewController.h"
#import "MyNotificationDefine.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
// 发个通知

UILocalNotification *notification = [[UILocalNotification alloc] init];

// 先注册, 再通过id来使用
// category 是通知所使用的显示样式的category的identifier
notification.category = MyUserNotificationCategoryStyleIdentifier;

notification.fireDate = [NSDate dateWithTimeIntervalSinceNow:4];
notification.alertBody = @"不要放弃治疗";

[[UIApplication sharedApplication] scheduleLocalNotification:notification];
}

@end

#ifndef MyNotificationDefine_h
#define MyNotificationDefine_h

#define MyUserNotificationCategoryStyleIdentifier @"MyUserNotificationCategoryStyleIdentifier"

#endif /* MyNotificationDefine_h */