1、新建target
2、实现unnotificationserviceextension
我这里用的是swift
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//
// 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()
}
}
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3、发push的时候，加上”mutable-content”: 1
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{
"aps": {
"alert": "instant message from crm",
"sound": "default",
"mutable-content": 1
},
......
"image": "https://g0.fbcontent.cn/api/tutor/images/153c6c68411747f.jpg"
}
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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。
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