将图像上传到服务器 - Swift 3 [英] Upload image to server - Swift 3
问题描述
我想将图像作为参数与我的请求一起发送.我已经使用下面的代码来调用我的 POST 请求,但我不知道如何将图像附加到正文中.
I want to send an image as a parameter along with my request. I have used the code below to call my POST request but I don't know how to append image to the body.
我通过图像选择器获取图像如下:
I am getting the image through image picker as follows:
if let image = info[UIImagePickerControllerOriginalImage] as? UIImage {
我的请求如下
var request = URLRequest(url: URL(string: "")!) // link removed
request.httpMethod = "POST"
let postString = "user_id=(userId)&image=(image)"
request.httpBody = postString.data(using:.utf8)
let task = URLSession.shared.dataTask(with: request) { data, response, error in
guard let data = data, error == nil else { // check for fundamental networking error
return
}
do {
let json = try JSONSerialization.jsonObject(with: data, options: .mutableContainers) as? AnyObject
if let parseJSON = json {
print("resp :(parseJSON)")
}
} catch let error as NSError {
print("error : (error)")
}
}
task.resume()
我是 Swift 的新手.我已经通过 multipart/form-data 看到了这一点,但无法自己实现.我不想以 base 64 格式对其进行编码.请帮我解决这个问题.
I am new to Swift. I have seen this through multipart/form-data but unable to implement it myself. I do not want to encode it in base 64 format. Please help me in this.
推荐答案
我使用以下结构发送图片:
I use the following structure for sending images:
func createRequestBodyWith(parameters:[String:NSObject], filePathKey:String, boundary:String) -> NSData {
let body = NSMutableData()
for (key, value) in parameters {
body.appendString(string: "--(boundary)
")
body.appendString(string: "Content-Disposition: form-data; name="(key)"
")
body.appendString(string: "(value)
")
}
body.appendString(string: "--(boundary)
")
let mimetype = "image/jpg"
let defFileName = "yourImageName.jpg"
let imageData = UIImageJPEGRepresentation(yourImage, 1)
body.appendString(string: "Content-Disposition: form-data; name="(filePathKey!)"; filename="(defFileName)"
")
body.appendString(string: "Content-Type: (mimetype)
")
body.append(imageData!)
body.appendString(string: "
")
body.appendString(string: "--(boundary)--
")
return body
}
func generateBoundaryString() -> String {
return "Boundary-(NSUUID().uuidString)"
}
extension NSMutableData {
func appendString(string: String) {
let data = string.data(using: String.Encoding.utf8, allowLossyConversion: true)
append(data!)
}
}
然后你必须在你的函数中创建主体,如下所示:
then you have to create body in your function like following:
request.httpBody = self.createRequestBodyWith(parameters:yourParamsDictionary, filePathKey:yourKey, boundary:self.generateBoundaryString)
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