기사 디렉토리
머리말
지난 이틀 동안 Swift 프로젝트를 유지보수하면서 몇 가지 문제에 직면했습니다.
1. 영상에 대하여
1. 동영상 크기를 확인하고 동영상 파일 URL을 전달합니다.
static func getVideoSize(by url: URL?) -> CGSize {
var size: CGSize = .zero
guard let url = url else {
return size
}
let asset = AVAsset(url: url)
let tracks = asset.tracks(withMediaType: AVMediaType.video)
guard let track = tracks.first else {
return size
}
let t = track.preferredTransform
size = CGSize(width: track.naturalSize.height, height: track.naturalSize.width)
if t.a == 0 && t.b == 1.0 && t.c == -1.0 && t.d == 0 {
size = CGSize(width: track.naturalSize.height, height: track.naturalSize.width)
} else if t.a == 0 && t.b == -1.0 && t.c == 1.0 && t.d == 0 {
// PortraitUpsideDown
size = CGSize(width: track.naturalSize.height, height: track.naturalSize.width)
} else if t.a == 1.0 && t.b == 0 && t.c == 0 && t.d == 1.0 {
// LandscapeRight
size = CGSize(width: track.naturalSize.width, height: track.naturalSize.height)
}else if t.a == -1.0 && t.b == 0 && t.c == 0 && t.d == -1.0 {
// LandscapeLeft
size = CGSize(width: track.naturalSize.width, height: track.naturalSize.height)
}
return size
}
2. 비디오 파일 크기 가져오기
func wm_getFileSize(_ url:URL) -> Double {
if let fileData:Data = try? Data.init(contentsOf: url) {
let size = Double(fileData.count) / (1024.00 * 1024.00)
return size
}
return 0.00
}
3. 비디오 길이를 얻으려면 실제로 Asset.duration을 직접 사용할 수 있습니다. 자산은 PHAsset 유형입니다.
let asset11 = AVURLAsset(url: videoURL) as AVURLAsset
let totalSeconds = Int(CMTimeGetSeconds(asset11.duration))
let minutes = totalSeconds / 60
let seconds = totalSeconds % 60
let mediaTime = String(format:"%02i:%02i",minutes, seconds)
print("打印视频的时长=======",totalSeconds)
4. 비디오 URL 얻기
let videoFileName = "\(asset.localIdentifier).mp4".replace("-", new: "").replace("/", new: "")
let videoURL = URL(fileURLWithPath: NSTemporaryDirectory()).appendingPathComponent(videoFileName)
5. 비디오의 첫 번째 프레임 가져오기
static func splitVideoFileUrlFps(splitFileUrl: URL, fps: Float, splitCompleteClosure: @escaping (Bool, [UIImage]) -> Void) {
var splitImages = [UIImage]()
let optDict = NSDictionary(object: NSNumber(value: false), forKey: AVURLAssetPreferPreciseDurationAndTimingKey as NSCopying)
let urlAsset = AVURLAsset(url: splitFileUrl, options: optDict as? [String: Any])
let cmTime = urlAsset.duration
let durationSeconds: Float64 = CMTimeGetSeconds(cmTime) //视频总秒数
var times = [NSValue]()
let totalFrames: Float64 = durationSeconds * Float64(fps) //获取视频的总帧数
var timeFrame: CMTime
for i in 0...Int(totalFrames) {
timeFrame = CMTimeMake(value: Int64(i), timescale: Int32(fps)) //第i帧， 帧率
let timeValue = NSValue(time: timeFrame)
times.append(timeValue)
}
let imgGenerator = AVAssetImageGenerator(asset: urlAsset)
imgGenerator.requestedTimeToleranceBefore = CMTime.zero //防止时间出现偏差
imgGenerator.requestedTimeToleranceAfter = CMTime.zero
imgGenerator.appliesPreferredTrackTransform = true //不知道是什么属性，不写true视频帧图方向不对
let timesCount = times.count
//获取每一帧的图片
imgGenerator.generateCGImagesAsynchronously(forTimes: times) {
(requestedTime, image, actualTime, result, error) in
//times有多少次body就循环多少次。。。
var isSuccess = false
switch (result) {
case AVAssetImageGenerator.Result.cancelled:
print("cancelled------")
case AVAssetImageGenerator.Result.failed:
print("failed++++++")
case AVAssetImageGenerator.Result.succeeded:
let framImg = UIImage(cgImage: image!)
splitImages.append(framImg)
if (Int(requestedTime.value) == (timesCount - 1)) {
//最后一帧时 回调赋值
isSuccess = true
splitCompleteClosure(isSuccess, splitImages)
print("completed")
}
}
}
}
2. 사진 정보
1. 이미지 크기 가져오기
static func getImageSize(asset:PHAsset) -> Float{
let resource = PHAssetResource.assetResources(for: asset).first
if let size = resource?.value(forKey: "fileSize") as? Float {
return size/(1024*1024)
}
return 0.0
}
2. 온라인 이미지의 가로 및 세로 화면을 결정합니다.
static func isLandscapeImage(_ imageUrl: String?) -> Bool {
guard let imageUrl = imageUrl else {
return true
}
let urlQuery = imageUrl.components(separatedBy: ",")
//获取长宽值
guard urlQuery.count > 2,
let widthStr = urlQuery.first(where: {
$0.hasPrefix("w_")}),
let heightStr = urlQuery.first(where: {
$0.hasPrefix("h_")}) else {
return true
}
//从字符串中获取Int类型的长宽
let nonDigits = CharacterSet.decimalDigits.inverted
guard let width = Int(widthStr.trimmingCharacters(in: nonDigits)),
let height = Int(heightStr.trimmingCharacters(in: nonDigits)) else {
return true
}
if width > height {
return true
}
return false
}
3. 사진의 중앙을 중앙으로 사용하고 가장 작은 변을 변의 길이로 사용하여 정사각형 사진을 자릅니다.
static func cropSquareImage(image: UIImage?) -> UIImage? {
//将UIImage转换成CGImageRef
guard let image = image,
let sourceImageRef = image.cgImage else {
return nil
}
let imageWidth = image.size.width * image.scale
let imageHeight = image.size.height * image.scale
let width = imageWidth > imageHeight ? imageHeight : imageWidth
let offsetX = (imageWidth - width) / 2
let offsetY = (imageHeight - width) / 2
let rect = CGRect(x: offsetX, y: offsetY, width: width, height: width)
var newImage: UIImage? = nil
if let aRef = sourceImageRef.cropping(to: rect) {
//按照给定的矩形区域进行剪裁
newImage = UIImage(cgImage: aRef)
}
return newImage
}
3. 이미지 업로드에 대하여
1. Alamofire를 사용하여 파일을 넣고 업로드합니다.
let sUrl = URL.init(string: putUrl)
if sUrl == nil {
return }
let encoder = JSONEncoder()
let jsonData = try! encoder.encode(data)
let data1 = "last_value=no".data(using: String.Encoding(rawValue: NSUTF8StringEncoding))
var request = URLRequest(url: sUrl!)
request.httpMethod = "PUT"
request.setValue("image/*", forHTTPHeaderField: "Content-Type")
request.timeoutInterval = 1000
request.httpBody = data
print("data=====",jsonData,"httpBody====",request.httpBody,"httpMethod====",request.httpMethod,"allHTTPHeaderFields====",request.allHTTPHeaderFields,"request====",request)
Alamofire.request(request).responseJSON {
response in
print("打印上传====",response)
switch response.result {
case .success(let value):
print ("finish")
let swiftyJson = JSON(value)
print("打印上传====",swiftyJson)
// completionHandler(swiftyJson, nil)
case .failure(let error):
print("打印上传错误====",error)
// completionHandler(nil, error)
}
}
2. Alamofire의 기본 업로드 및 반환 결과에 대한 데이터 분석
/**
TODO: 二进制流的形式上传
@data : 上传文件的数据对象
@URLConvertible : 上传的地址
注意： data的类型是Data,不能直接使用 NSData类型的对象。否则会出现 “Cannot invoke 'upload' with an argument list of type '(NSData?, to: String)'”错误提示。
*/
let dataPath = Bundle.main.path(forResource: "upDataName", ofType: "upDataSuffix")
let upData = NSData.init(contentsOfFile: dataPath!)
let upLoadRequest:UploadRequest = Alamofire.upload(Data.init(referencing: upData!), to: "https://network.net/upload")
// 上面的请求返回一个 “UploadRequest” 对象。我们可以对其进行解析，Alamofire请求数据解析的方法都使用与它。
upLoadRequest.validate().response {
(DDataRequest) in
if let acceptData = DDataRequest.data {
print(String.init(data: acceptData, encoding: String.Encoding.utf8)!)
}
if DDataRequest.error != nil {
print("上传失败！！！")
}
}
upLoadRequest.validate().responseJSON {
(DataResponse) in
if DataResponse.result.isSuccess {
print(String.init(data: DataResponse.data!, encoding: String.Encoding.utf8)!)
}
if DataResponse.result.isFailure {
print("上传失败！！！")
}
}
upLoadRequest.validate().responseString {
(DataResponse) in
if DataResponse.result.isSuccess {
print(String.init(data: DataResponse.data!, encoding: String.Encoding.utf8)!)
}
if DataResponse.result.isFailure {
print("上传失败！！！")
}
}
upLoadRequest.validate().responsePropertyList {
(DataResponse) in
if DataResponse.result.isSuccess {
print(String.init(data: DataResponse.data!, encoding: String.Encoding.utf8)!)
}
if DataResponse.result.isFailure {
print("上传失败！！！")
}
}
upLoadRequest.validate().response(queue: DispatchQueue.main) {
(DDataRequest) in
if let acceptData = DDataRequest.data {
print(String.init(data: acceptData, encoding: String.Encoding.utf8)!)
}
if DDataRequest.error != nil {
print("上传失败！！！")
}
}
3. Alamofire 파일 업로드 진행
/**
TODO: 二进制流的形式上传
@data : 上传文件的数据对象
@URLConvertible : 上传的地址
注意： data的类型是Data,不能直接使用 NSData类型的对象。否则会出现 “Cannot invoke 'upload' with an argument list of type '(NSData?, to: String)'”错误提示。
*/
let dataPath = Bundle.main.path(forResource: "upDataName", ofType: "upDataSuffix")
let upData = NSData.init(contentsOfFile: dataPath!)
let upLoadRequest:UploadRequest = Alamofire.upload(Data.init(referencing: upData!), to: "https://network.net/upload")
/**
可获取上传进度
*/
upLoadRequest.uploadProgress {
(progress) in
// 上传进度
print(progress.fractionCompleted)
}
upLoadRequest.uploadProgress(queue: DispatchQueue.main) {
(progress) in
// 上传进度
print(progress.fractionCompleted)
}
4. Alamofire 데이터 유형 업로드
/**
Data 数据流
File 文件路径
stream 输入流
multipartFormData 多文件上传
TODO: 二进制流的形式上传
@data : 上传文件的数据对象
@URLConvertible : 上传的地址
注意： data的类型是Data,不能直接使用 NSData类型的对象。否则会出现 “Cannot invoke 'upload' with an argument list of type '(NSData?, to: String)'”错误提示。
*/
let dataPath = Bundle.main.path(forResource: "upDataName", ofType: "upDataSuffix")
let upData = NSData.init(contentsOfFile: dataPath!)
let upLoadRequest:UploadRequest = Alamofire.upload(Data.init(referencing: upData!), to: "https://network.net/upload")
// 上面的请求返回一个 “UploadRequest” 对象。我们可以对其进行解析，Alamofire请求数据解析的方法都使用与它。
upLoadRequest.validate().response {
(DDataRequest) in
if let acceptData = DDataRequest.data {
print(String.init(data: acceptData, encoding: String.Encoding.utf8)!)
}
if DDataRequest.error != nil {
print("上传失败！！！")
}
}
5. Alamofire 파일 형식 업로드
/**
TODO: 通过文件路径上传
@fileURL : 上传文件的路径
@URLConvertible : 上传文件的网址
注意： fileURL 要转化一下，否则会报 “Cannot invoke 'upload' with an argument list of type '(String, to: String)'”错。
*/
Alamofire.upload(URL.init(fileURLWithPath: dataPath!), to: "https://network.net/upload").validate().responseData {
(DDataRequest) in
if DDataRequest.result.isSuccess {
print(String.init(data: DDataRequest.data!, encoding: String.Encoding.utf8)!)
}
if DDataRequest.result.isFailure {
print("上传失败！！！")
}
}
6. Alamofire의 multipartFormData 양식 업로드
/**
TODO: 多部分数据上传
*/
Alamofire.upload(multipartFormData: {
(MFData) in
MFData.append(upData! as Data, withName: "NetWork")
MFData.append(upData! as Data, withName: "NetWork小贱")
}, to: "https://network.net/upload") {
(SMResult) in
switch SMResult {
case .success(let request, let streamingFromDisk, let streamFileURL):
print(streamFileURL!,request,streamingFromDisk)
request.responseJSON(completionHandler: {
(DResponse) in
if DResponse.result.isSuccess {
print("上传成功！！！")
}
})
break
case .failure(_):
print("上传失败！！！")
break
}
}
7. 데이터 유형 요청 업로드
/**
TODO: 可以自定义请求的二进制流上传
*/
let uploadRequest = URLRequest.init(url: URL.init(fileURLWithPath: dataPath!), cachePolicy: .reloadIgnoringCacheData, timeoutInterval: 20)
Alamofire.upload(upData! as Data , with:uploadRequest).validate().responseJSON {
(dataResponse) in
if dataResponse.result.isSuccess {
let acceptData = dataResponse.data
print(String.init(data: acceptData!, encoding: String.Encoding.utf8)!)
}
if dataResponse.result.isFailure {
print("上传失败！！！")
}
}
8. 파일 형식 요청 업로드
/**
TODO: 可以自定义请求的数据路径形式上传
*/
Alamofire.upload(URL.init(fileURLWithPath: dataPath!), with: uploadRequest).validate().response(queue: DispatchQueue.main) {
(DDResponse) in
if let acceptData = DDResponse.data {
print(String.init(data: acceptData, encoding: String.Encoding.utf8)!)
}
if DDResponse.error != nil {
print("上传失败！！！")
}
}
9. 스트림 유형 업로드
/**
TODO: 可以自定义请求的数据输入流形式上传
*/
Alamofire.upload(inPutStraeam, with: uploadRequest).validate().responseJSON {
(DataResponse) in
if DataResponse.result.isSuccess {
print("上传成功")
}
if DataResponse.result.isFailure {
print("上传失败！！！")
}
}
10. MultipartFormData 유형 업로드
/**
TODO: 可定义请去形式的多部分上传
*/
Alamofire.upload(multipartFormData: {
(MFData) in
MFData.append(upData! as Data, withName: "NetWork")
MFData.append(upData! as Data, withName: "NetWork小贱")
}, with: uploadRequest) {
(SMResult) in
switch SMResult {
case .success(let request, let streamingFromDisk, let streamFileURL):
print(streamFileURL!,request,streamingFromDisk)
request.responseJSON(completionHandler: {
(DResponse) in
if DResponse.result.isSuccess {
print("上传成功！！！")
}
})
break
case .failure(_):
print("上传失败！！！")
break
}
}
11、
요약하다
지난 이틀 동안 겪었던 문제와 방법을 요약해 보았는데, 도움이 되셨으면 좋겠습니다!