iOS 10新的通知机制中添加图片的方法详解
1、新建Target
2、实现UNNotificationServiceExtension
我这里用的是swift
// // NotificationService.swift // NotificationServiceExtension // // Created by Heyuan Li on 17/2/26. // Copyright © 2017年 fenbi. All rights reserved. // import UserNotifications class NotificationService: UNNotificationServiceExtension { var contentHandler: ((UNNotificationContent) -> Void)? var bestAttemptContent: UNMutableNotificationContent? override func didReceive(_ request: UNNotificationRequest, withContentHandler contentHandler: @escaping (UNNotificationContent) -> Void) { self.contentHandler = contentHandler bestAttemptContent = (request.content.mutableCopy() as? UNMutableNotificationContent) if let bestAttemptContent = bestAttemptContent { // Modify the notification content here... bestAttemptContent.title = "上课啦" if let imageURLString = bestAttemptContent.userInfo["image"] as? String, let URL = URL(string: imageURLString) { downloadAndSave(url: URL) { localURL in if let localURL = localURL { do { let attachment = try UNNotificationAttachment(identifier: "image_downloaded", url: localURL, options: nil) bestAttemptContent.attachments = [attachment] } catch { print(error) } } contentHandler(bestAttemptContent) } } } } override func serviceExtensionTimeWillExpire() { // Called just before the extension will be terminated by the system. // Use this as an opportunity to deliver your "best attempt" at modified content, otherwise the original push payload will be used. if let contentHandler = contentHandler, let bestAttemptContent = bestAttemptContent { contentHandler(bestAttemptContent) } } private func downloadAndSave(url: URL, handler: @escaping (_ localURL: URL?) -> Void) { let task = URLSession.shared.dataTask(with: url, completionHandler: { data, res, error in var localURL: URL? = nil if let data = data { let ext = (url.absoluteString as NSString).pathExtension let cacheDirs = FileManager.default.urls(for: .cachesDirectory, in: .userDomainMask) if cacheDirs.count > 0 { let cacheDir = cacheDirs[cacheDirs.count - 1] /// TODO tutor cache /// TODO md5 extension let url = cacheDir.appendingPathComponent("123").appendingPathExtension(ext) if let _ = try? data.write(to: url) { localURL = url } } } handler(localURL) }) task.resume() } }
3、发Push的时候,加上”mutable-content”: 1
{ "aps": { "alert": "instant message from CRM", "sound": "default", "mutable-content": 1 }, ...... "image": "https://g0.fbcontent.cn/api/tutor/images/153c6c68411747f.jpg" }
这个很关键
最后运行,就会自动展示图片啦。
需要说明的是,默认是只能https的,如果想显示http图片,需要自行设定ATS相关配置。
总结
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