iOS 10新特性 - 自定义消息推送界面

关于消息推送，网路上的博客已经讲得非常详尽，最近研究一个自定义消息推送界面的需求，是iOS 10以后才有的新特性，但目前资料也不太多，于是自己整理了下，发出来以供来者参考。

先奉上本篇Demo源码：JZNotic - chenzht

前戏需要自己集成好普通的消息推送功能，这里不再繁述，以下都是建立在消息推送已经成功搭建的基础上，正文kai'shi。

1. 点击File--New--Target

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2. 选择Notification Content

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3. 会生成这样一个文件夹，这就一目了然，和开发一个普通界面并无二致。但需要注意的是，在MainInterface.storyboard中自定你的UI页面，可以随意发挥，但是这个UI界面只能用于展示，并不能响应点击或者手势其他事件，只能通过category来实现。

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4. 说起这个category，便要在3中的info.plist进行如下设置，UNNotificationExtensionCategory需设置与推送消息的category一致，UNNotificationExtensionDefaultContentHidden默认值便是0

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5. 此后tagert选择自己创建的Notification Content -> Run -> 在弹出的选款中选择Demo然后运行

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6. 效果如下（Demo中选择自定义1，然后点击start即可看到效果），左边是推送消息里解析的图片，右边是AVPlayer播放的视频，下面则是自定义添加的Action。

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分别说说这几部分代码。

1> Custom Content 用户自定义界面

NotificationViewController.m

#import "NotificationViewController.h"
#import <UserNotifications/UserNotifications.h>
#import <UserNotificationsUI/UserNotificationsUI.h>
#import <AVFoundation/AVFoundation.h>

@interface NotificationViewController () <UNNotificationContentExtension>

@property (weak, nonatomic) IBOutlet UIView *player_view;
@property IBOutlet UILabel *label;
@property (weak, nonatomic) IBOutlet UIImageView *imageView;
@end

@implementation NotificationViewController
{
    AVPlayer *player;
}
- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any required interface initialization here.
}

- (void)didReceiveNotification:(UNNotification *)notification {
    self.label.text = notification.request.content.body;
    UNNotificationContent * content = notification.request.content;
    UNNotificationAttachment * attachment_img = content.attachments[0];
    if (attachment_img.URL.startAccessingSecurityScopedResource) {
        self.imageView.image = [UIImage imageWithContentsOfFile:attachment_img.URL.path];
    }
    
    
    // 视频
    UNNotificationAttachment * attachment_mp4 = content.attachments[1];
    AVPlayerItem *item = [AVPlayerItem playerItemWithURL:attachment_mp4.URL];
    player = [AVPlayer playerWithPlayerItem:item];
    AVPlayerLayer *layer = [AVPlayerLayer playerLayerWithPlayer:player];
    layer.frame = CGRectMake(0, 0, self.player_view.frame.size.width, self.player_view.frame.size.height);
    // 显示播放视频的视图层要添加到self.view的视图层上面
    [self.player_view.layer addSublayer:layer];
    
    //最后一步开始播放
    [player play];
    
}

@end

2> Default Content，该部分是可以隐藏的，只要在将Content的Info。plist文件中UNNotificationExtensionDefaultContentHidden设置为YES即可

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3> Notification Actions部分，addNotificationAction是上图效果，addNotificationAction2会将效果图中的Notification Actions变为输入框

JZUserNotification.m

#import "JZUserNotification.h"
#import <UserNotifications/UserNotifications.h>
#import <CoreLocation/CoreLocation.h>
#import "AppDelegate.h"
#import "DownloadManager.h"

+ (void)addNotificationAction{

    // UNNotificationActionOptions
    // * 需要解锁显示，点击不会进app。
    // UNNotificationActionOptionAuthenticationRequired = (1 << 0),
    // * 红色文字。点击不会进app。
    // UNNotificationActionOptionDestructive = (1 << 1),
    // * 黑色文字。点击会进app。
    // UNNotificationActionOptionForeground = (1 << 2),

    //创建按钮Action
    UNNotificationAction *lookAction = [UNNotificationAction actionWithIdentifier:@"action.join" title:@"接收邀请" options:UNNotificationActionOptionAuthenticationRequired];
    
    UNNotificationAction *joinAction = [UNNotificationAction actionWithIdentifier:@"action.look" title:@"查看邀请" options:UNNotificationActionOptionForeground];
    
    UNNotificationAction *cancelAction = [UNNotificationAction actionWithIdentifier:@"action.cancel" title:@"取消" options:UNNotificationActionOptionDestructive];
    
    // 注册 category
    // * identifier 标识符
    // * actions 操作数组
    // * intentIdentifiers 意图标识符 可在 <Intents/INIntentIdentifiers.h> 中查看，主要是针对电话、carplay 等开放的 API。
    // * options 通知选项 枚举类型 也是为了支持 carplay
    UNNotificationCategory *notificationCategory = [UNNotificationCategory categoryWithIdentifier:@"JZCategory" actions:@[lookAction, joinAction, cancelAction] intentIdentifiers:@[] options:UNNotificationCategoryOptionCustomDismissAction];
    
    // 将 category 添加到通知中心
    UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter];
    [center setNotificationCategories:[NSSet setWithObject:notificationCategory]];
}

+ (void)addNotificationAction2{
    
    // 创建 UNTextInputNotificationAction 比 UNNotificationAction 多了两个参数
    // * buttonTitle 输入框右边的按钮标题
    // * placeholder 输入框占位符
    UNTextInputNotificationAction *inputAction = [UNTextInputNotificationAction actionWithIdentifier:@"action.input" title:@"输入" options:UNNotificationActionOptionForeground textInputButtonTitle:@"发送" textInputPlaceholder:@"tell me loudly"];
    // 注册 category
    UNNotificationCategory *notificationCategory = [UNNotificationCategory categoryWithIdentifier:@"JZCategory" actions:@[inputAction] intentIdentifiers:@[] options:UNNotificationCategoryOptionCustomDismissAction];
    
    UNUserNotificationCenter *center = [UNUserNotificationCenter currentNotificationCenter];
    [center setNotificationCategories:[NSSet setWithObject:notificationCategory]];
    
}

Action事件的操作：所有的push(不管远端或者本地)点击都会走到下面的代理方法（如果在Custom Content中添加Button，点击事件不会由NotificationViewController来处理，而是同样走这个回调）

- (void)userNotificationCenter:(UNUserNotificationCenter *)center didReceiveNotificationResponse:(UNNotificationResponse *)response withCompletionHandler:(void(^)())completionHandler
{
    NSLog(@"didReceiveNotificationResponse : %@", response);
    
    //点击或输入action
    NSString* actionIdentifierStr = response.actionIdentifier;
    //输入
    if ([response isKindOfClass:[UNTextInputNotificationResponse class]]) {
        
        NSString* userSayStr = [(UNTextInputNotificationResponse *)response userText];
        NSLog(@"actionid = %@\n  userSayStr = %@",actionIdentifierStr, userSayStr);
        // User Defined
    }
    
    //点击
    if ([actionIdentifierStr isEqualToString:@"action.join"]) {
        
        // User Defined
        NSLog(@"actionid = %@\n",actionIdentifierStr);
    }else if ([actionIdentifierStr isEqualToString:@"action.look"]){
        
        // User Defined
        NSLog(@"actionid = %@\n",actionIdentifierStr);
    }
    
    completionHandler();
}