IOS onesignal通知中的圖片

Question

如何創建帶有圖像的IOS通知之類的通知

據說您不能為IOS指定圖標，但是此應用程序是如何做到的？

我嘗試了ios_attachments，small_icon，large_icon，big_picture，但未按預期回答

Answer 1

您可以將Notification Service Extension用於帶圖像的Push Notification。 這是iOS10的新功能。 這里有更多細節。

腳步：

1. 在推送通知的有效負載中指定圖像URL，如下所示：

    { "aps" : { "alert" : "You got your emails.", "badge" : 9, "sound" : "bingbong.aiff" }, "image_url" : "http://host_name/image.png", } 

2. 發送推送通知

3. 收到推送通知后，將在顯示通知橫幅之前激活Notification Service Extension ，因此將使用有效載荷中的URL將圖像下載並存儲在tmp區域中

4. 顯示帶有圖像的通知

實施 Notification Service Extension

1. 添加Notification Service Extension

   • Xcode菜單中的File > New > Target

• iOS > Application Extension > Notification Service Extension

• NotificationService.swift已創建。

2. func didReceive(_ request: UNNotificationRequest, withContentHandler contentHandler: @escaping (UNNotificationContent) -> Void)

這里的代碼示例：

override func didReceive(_ request: UNNotificationRequest, withContentHandler contentHandler: @escaping (UNNotificationContent) -> Void) {
    self.contentHandler = contentHandler
    bestAttemptContent = (request.content.mutableCopy() as? UNMutableNotificationContent)

    guard let imageUrl = request.content.userInfo["image_url"] as? String else {
        if let bestAttemptContent = self.bestAttemptContent {
            contentHandler(bestAttemptContent)
        }
        return
    }

    let session = URLSession(configuration: URLSessionConfiguration.default)
    let task = session.dataTask(with: URL(string: imageUrl)!, completionHandler: { (data, response, error) in
        do {
            if let tempImageFilePath = NSURL(fileURLWithPath:NSTemporaryDirectory())
                .appendingPathComponent("tmp.jpg") {
                try data?.write(to: tempImageFilePath)

                if let bestAttemptContent = self.bestAttemptContent {
                    let attachment = try UNNotificationAttachment(identifier: "id", url: tempImageFilePath, options: nil)
                    bestAttemptContent.attachments = [attachment]
                    contentHandler(bestAttemptContent)
                }
            } else {
                // error: writePath is not URL
                if let bestAttemptContent = self.bestAttemptContent {
                    contentHandler(bestAttemptContent)
                }
            }
        } catch _ {
            // error: data write error or create UNNotificationAttachment error
            if let bestAttemptContent = self.bestAttemptContent {
                contentHandler(bestAttemptContent)
            }
        }
    })
    task.resume()
}

這使您的應用可以從有效負載中的image _ url下載圖像並將其附加到推送通知中。