具有UIImage或远程URL的UNNotificationAttachment
在我的Notification Service
Extension我从一个URL下载的图像显示为UNNotificationAttachment
一个通知。
因此,我将此图像作为UIImage,没有看到仅在设置通知时将其写入磁盘上的应用程序目录/组容器中的需要。
(应适用于本地和远程通知)
回答:
- 在tmp文件夹中创建目录
- 将的
NSData
表示形式写入UIImage
新创建的目录 - 使用URL到tmp文件夹中的文件创建UNNotificationAttachment
- 清理tmp文件夹
我写了一个扩展 UINotificationAttachment
extension UNNotificationAttachment { static func create(identifier: String, image: UIImage, options: [NSObject : AnyObject]?) -> UNNotificationAttachment? {
let fileManager = FileManager.default
let tmpSubFolderName = ProcessInfo.processInfo.globallyUniqueString
let tmpSubFolderURL = URL(fileURLWithPath: NSTemporaryDirectory()).appendingPathComponent(tmpSubFolderName, isDirectory: true)
do {
try fileManager.createDirectory(at: tmpSubFolderURL, withIntermediateDirectories: true, attributes: nil)
let imageFileIdentifier = identifier+".png"
let fileURL = tmpSubFolderURL.appendingPathComponent(imageFileIdentifier)
let imageData = UIImage.pngData(image)
try imageData()?.write(to: fileURL)
let imageAttachment = try UNNotificationAttachment.init(identifier: imageFileIdentifier, url: fileURL, options: options)
return imageAttachment
} catch {
print("error " + error.localizedDescription)
}
return nil
}
}
因此,UNUserNotificationRequest
使用UNUserNotificationAttachment
a
进行创建UIImage
就可以像这样
let identifier = ProcessInfo.processInfo.globallyUniqueStringlet content = UNMutableNotificationContent()
content.title = "Hello"
content.body = "World"
if let attachment = UNNotificationAttachment.create(identifier: identifier, image: myImage, options: nil) {
// where myImage is any UIImage
content.attachments = [attachment]
}
let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 120.0, repeats: false)
let request = UNNotificationRequest.init(identifier: identifier, content: content, trigger: trigger)
UNUserNotificationCenter.current().add(request) { (error) in
// handle error
}
这应该可行,因为UNNotificationAttachment
会将图像文件复制到自己的位置。
以上是 具有UIImage或远程URL的UNNotificationAttachment 的全部内容, 来源链接: utcz.com/qa/416151.html