我想在所有页面都没有连接和/或连接时显示警报消息，但是它不起作用。显示网络类型有效，但没有显示警告消息。
目标是在连接和断开APP时显示消息。我正在关注https://ionicframework.com/docs/native/network/
这是我在import Foundation
import ReplayKit
import AVKit
import Photos
class ScreenRecorder
{
var assetWriter:AVAssetWriter!
var videoInput:AVAssetWriterInput!
var audioInput:AVAssetWriterInput!
var startSesstion = false
// let viewOverlay = WindowUtil()
//MARK: Screen Recording
func startRecording(withFileName fileName: String, recordingHandler:@escaping (Error?)-> Void)
{
if #available(iOS 11.0, *)
{
let fileURL = URL(fileURLWithPath: ReplayFileUtil.filePath(fileName))
assetWriter = try! AVAssetWriter(outputURL: fileURL, fileType:
AVFileType.mp4)
let videoOutputSettings: Dictionary<String, Any> = [
AVVideoCodecKey : AVVideoCodecType.h264,
AVVideoWidthKey : UIScreen.main.bounds.size.width,
AVVideoHeightKey : UIScreen.main.bounds.size.height,
// AVVideoCompressionPropertiesKey : [
// AVVideoAverageBitRateKey :425000, //96000
// AVVideoMaxKeyFrameIntervalKey : 1
// ]
];
var channelLayout = AudioChannelLayout.init()
channelLayout.mChannelLayoutTag = kAudioChannelLayoutTag_MPEG_5_1_D
let audioOutputSettings: [String : Any] = [
AVNumberOfChannelsKey: 6,
AVFormatIDKey: kAudioFormatMPEG4AAC_HE,
AVSampleRateKey: 44100,
AVChannelLayoutKey: NSData(bytes: &channelLayout, length: MemoryLayout.size(ofValue: channelLayout)),
]
videoInput = AVAssetWriterInput(mediaType: AVMediaType.video,outputSettings: videoOutputSettings)
audioInput = AVAssetWriterInput(mediaType: AVMediaType.audio,outputSettings: audioOutputSettings)
videoInput.expectsMediaDataInRealTime = true
audioInput.expectsMediaDataInRealTime = true
assetWriter.add(videoInput)
assetWriter.add(audioInput)
RPScreenRecorder.shared().startCapture(handler: { (sample, bufferType, error) in
recordingHandler(error)
if CMSampleBufferDataIsReady(sample)
{
DispatchQueue.main.async { [weak self] in
if self?.assetWriter.status == AVAssetWriterStatus.unknown {
print("AVAssetWriterStatus.unknown")
if !(self?.assetWriter.startWriting())! {
return
}
self?.assetWriter.startSession(atSourceTime: CMSampleBufferGetPresentationTimeStamp(sample))
self?.startSesstion = true
}
// if self.assetWriter.status == AVAssetWriterStatus.unknown
// {
// self.assetWriter.startWriting()
// self.assetWriter.startSession(atSourceTime: CMSampleBufferGetPresentationTimeStamp(sample))
// self?.startSesstion = true
}
if self.assetWriter.status == AVAssetWriterStatus.failed {
print("Error occured, status = \(String(describing: self.assetWriter.status.rawValue)), \(String(describing: self.assetWriter.error!.localizedDescription)) \(String(describing: self.assetWriter.error))")
recordingHandler(self.assetWriter.error)
return
}
if (bufferType == .video)
{
if(self.videoInput.isReadyForMoreMediaData) && self.startSesstion {
self.videoInput.append(sample)
}
}
if (bufferType == .audioApp)
{
if self.audioInput.isReadyForMoreMediaData
{
//print("Audio Buffer Came")
self.audioInput.append(sample)
}
}
}
}) { (error) in
recordingHandler(error)
// debugPrint(error)
}
} else
{
// Fallback on earlier versions
}
}
func stopRecording(isBack: Bool, aPathName: String ,handler: @escaping (Error?) -> Void)
{
//var isSucessFullsave = false
if #available(iOS 11.0, *)
{
self.startSesstion = false
RPScreenRecorder.shared().stopCapture{ (error) in
self.videoInput.markAsFinished()
self.audioInput.markAsFinished()
handler(error)
if error == nil{
self.assetWriter.finishWriting{
self.startSesstion = false
print(ReplayFileUtil.fetchAllReplays())
if !isBack{
self.PhotosSaveWithAurtorise(aPathName: aPathName)
}else{
self.deleteDirectory()
}
}
}else{
self.deleteDirectory()
}
}
}else {
// print("Fallback on earlier versions")
}
}
func PhotosSaveWithAurtorise(aPathName: String) {
if PHPhotoLibrary.authorizationStatus() == .authorized {
self.SaveToCamera(aPathName: aPathName)
} else {
PHPhotoLibrary.requestAuthorization({ (status) in
if status == .authorized {
self.SaveToCamera(aPathName: aPathName)
}
})
}
}
func SaveToCamera(aPathName: String){
PHPhotoLibrary.shared().performChanges({
PHAssetChangeRequest.creationRequestForAssetFromVideo(atFileURL: (ReplayFileUtil.fetchAllReplays().last)!)
}) { saved, error in
if saved {
addScreenCaptureVideo(aPath: aPathName)
print("Save")
}else{
NotificationCenter.default.post(name: NSNotification.Name(rawValue: "isScreenRecordFaildToSave"), object: nil)
print("error to save - \(error)")
}
}
}
func deleteDirectory() {
ReplayFileUtil.delete()
}
}
中的代码
app.component.ts谢谢
答案 0 :(得分：1)
在这里，您可以实现可在设备（cordova）和pwa模式下均可使用的“网络监视器”。在您的情况下，您正在取消订阅应保留的订阅。
// DETECT DEVICE/BROWSER:
this.appIsOnDevice = !this.platform.url().startsWith('http');
// INIT NETWORK MONITOR:
initNetworkMonitor() {
// check if we are on device or if its a browser
if (this.appIsOnDevice) {
// watch network for a disconnect
this.disconnectSubscription = this.network
.onDisconnect()
.subscribe(() => {
console.log("network disconnected:(");
// do alert here
});
// watch network for a connection
this.connectSubscription = this.network.onConnect().subscribe(() => {
console.log("network connected!");
// app got back online, do logic here
if (this.network.type === "wifi") {
console.log("we got a wifi connection, woohoo!");
}
});
} else {
this.browserOffline = Observable.fromEvent(window, "offline").subscribe(
() => {
// go offline logic here
}
);
this.browserOnline = Observable.fromEvent(window, "online").subscribe(
() => {
// go back online
}
);
}
}