在iOS开发中,本地推送是一种重要的用户交互方式,它允许应用程序在后台向用户发送通知,即使应用未运行或被关闭。本示例“iOS本地推送demo”主要关注iOS8及更高版本中的本地推送功能,包括注册流程、消息回复处理以及按钮消息推送。以下是关于这些知识点的详细解释: 1. **iOS8以后的本地推送注册**: 自iOS8开始,Apple引入了User Notification Framework(用户通知框架),用于处理本地和远程推送通知。注册本地推送涉及以下步骤: - 在应用程序的`AppDelegate.m`文件中导入`UserNotifications`框架:`#import <UserNotifications/UserNotifications.h>` - 接着,在`application:didFinishLaunchingWithOptions:`方法中请求用户授权推送通知权限:`UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter]; [center requestAuthorizationWithOptions:(UNAuthorizationOptionAlert + UNAuthorizationOptionSound + UNAuthorizationOptionBadge) completionHandler:^(BOOL granted, NSError * _Nullable error) {}];` - 注册通知内容和触发器:`UNMutableNotificationContent *content = [[UNMutableNotificationContent alloc] init]; content.title = @"本地推送标题"; content.body = @"本地推送的内容"; content.sound = [UNNotificationSound defaultSound]; UNTimeIntervalNotificationTrigger *trigger = [UNTimeIntervalNotificationTrigger triggerWithTimeInterval:5 repeats:NO]; UNNotificationRequest *request = [UNNotificationRequest requestWithIdentifier:@"localPush" content:content trigger:trigger]; [center addNotificationRequest:request withCompletionHandler:^(NSError * _Nullable error) {}];` 2. **消息回复处理**: iOS8及更高版本允许用户在通知中心直接回复消息。为此,你需要实现`UNUserNotificationCenterDelegate`协议,并处理用户的选择: - 在`AppDelegate.m`或特定的控制器中设置代理:`center.delegate = self;` - 实现`userNotificationCenter:didReceiveResponse:withCompletionHandler:`方法来处理用户的选择: ```objc -(void)userNotificationCenter:(UNUserNotificationCenter *)center didReceiveResponse:(UNNotificationResponse *)response withCompletionHandler:(void(^)(void))completionHandler { NSString *actionIdentifier = response.actionIdentifier; if ([actionIdentifier isEqualToString:UNNotificationDefaultActionIdentifier]) { NSLog(@"用户点击了默认操作"); } else if ([actionIdentifier isEqualToString:@"自定义操作"]) { NSLog(@"用户点击了自定义操作"); } completionHandler(); } ``` - 在通知内容中添加自定义操作:`UNNotificationAction *customAction = [UNNotificationAction actionWithIdentifier:@"自定义操作" title:@"自定义" options:UNNotificationActionOptionAuthenticationRequired]; UNNotificationCategory *category = [UNNotificationCategory categoryWithIdentifier:@"消息类别" actions:@[customAction] intentIdentifiers:@[] options:UNNotificationCategoryOptionNone]; [center setNotificationCategories:@[category]];` 3. **按钮消息推送**: 在本地推送中,你可以添加多个按钮供用户选择。这可以通过创建自定义通知类别和动作来实现。例如,你可以创建一个包含“接受”和“拒绝”两个按钮的通知,然后在`userNotificationCenter:didReceiveResponse:withCompletionHandler:`中根据用户的选择执行相应操作。 4. **支持Xcode Version 7.3.1**: 这意味着该示例代码是在Xcode 7.3.1环境下编译和测试的。虽然较旧,但此版本仍然可以处理iOS8及更高版本的本地推送功能。 5. **支持iOS7以后**: 虽然iOS8引入了User Notification Framework,但iOS7也有自己的推送通知API。这个示例可能包含兼容iOS7的代码,如使用`UIApplication`的`registerForRemoteNotificationTypes:`方法。然而,由于iOS7不再得到官方支持,开发者通常会专注于更新的API以确保最佳性能和兼容性。 "iOS本地推送demo"提供了iOS8及以上版本本地推送的实例,包括注册推送、消息回复处理以及自定义按钮的使用。开发者可以通过这个示例学习如何在自己的应用程序中实现这些功能,为用户提供更丰富的交互体验。
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