我是iOS的初学者,我对编程的知识很少。现在,在我的项目中,我遇到了一个任务,我必须发送正在创建的用户的数据以及上传图像以进行相机或照片库。实际上我不知道该怎么做,我已经搜索了互联网,stackoverflow和其他一些博客,介绍如何在swift4中发送带有参数的图像,并试图理解这个过程,我已经尝试了一个星期我不知道还能做什么。我在这里发布我的代码:
@IBAction func createAccountTapped(_sender: UIButton!) {
guard let image = profileImgView.image else {return}
let imageData = UIImageJPEGRepresentation(image, 0.7)
print(imageData!)
let byteArray = Array(imageData!)
let updateProfileUrl = "http://isit.beetlerim.com/api/UsersAPI/UpdateUserProfile"
let parameters = [
"UserName":userNameTF.text!,
"Password":passwordTF.text!,
"UserTypeId":2,
"profilePic":"(arc4random()).jpg",
"profileImage":byteArray,
"DOB":dateOfBirthTF.text!,
"PhoneNumber":phoneNumberTF.text!,
"Mobile":phoneNumberTF.text!,
"Email":emailAddressTF.text!,
"AddressLine1":address1TF.text!,
"AddressLine2":address2TF.text!,
"City":cityTF.text!,
"State":stateTF.text!,
"Country":countryTF.text!,
"ZipCode":zipcodeTF.text!
] as [String : Any]
let jsonData = try? JSONSerialization.data(withJSONObject: parameters, options: .prettyPrinted)
print(jsonData!)
// create post request
let url = URL(string: updateProfileUrl)!
var request = URLRequest(url: url)
request.httpMethod = "POST"
// insert json data to the request
request.httpBody = jsonData
request.setValue("application/json; charset=UTF-8", forHTTPHeaderField: "Content-Type")
request.addValue("application/json", forHTTPHeaderField: "Accpet")
let task = URLSession.shared.dataTask(with: request) { data, response, error in
guard let data = data, error == nil else {
print(error?.localizedDescription ?? "No data")
return
}
let responseJSON = try? JSONSerialization.jsonObject(with: data, options: .allowFragments )
if let responseJSON = responseJSON as? [String: Any] {
print(responseJSON)
}
}
task.resume()
}
我收到响应JSON : ["消息":发生错误。}
我也尝试了许多其他方法......它们都没有奏效。请帮帮我:
首先,您需要确保图像大小小于服务器端的最大大小,这是服务器可能会告诉您的一种方式,但您仍然需要使用服务器端对其进行调试。 假设大多数情况下,它通常限制为最大2 MB。
因此,您需要首先调整其大小,然后将其转换为base64,但这不是上传图像的首选方式,因为它会使传输的数据大小增加33%。服务器端应使用 multipart/form-data
,因为这是通过 HTTP 传输二进制数据的标准方式。但是你去吧:
let imageResized = image.resizeWith(percentage: 0.1)
let base64 = imageResized?.toBase64()
您需要使用以下扩展:
extension UIImage {
func resizeWith(percentage: CGFloat) -> UIImage? {
let imageView = UIImageView(frame: CGRect(origin: .zero, size: CGSize(width: size.width * percentage, height: size.height * percentage)))
imageView.contentMode = .scaleAspectFit
imageView.image = self
UIGraphicsBeginImageContextWithOptions(imageView.bounds.size, false, scale)
guard let context = UIGraphicsGetCurrentContext() else { return nil }
imageView.layer.render(in: context)
guard let result = UIGraphicsGetImageFromCurrentImageContext() else { return nil }
UIGraphicsEndImageContext()
return result
}
}
extension UIImage {
func toBase64() -> String? {
let imageData : NSData = UIImageJPEGRepresentation(self, 1.0)! as NSData
return imageData.base64EncodedString(options: NSData.Base64EncodingOptions.lineLength64Characters)
}
}
最后以这种方式发送参数:
let parameters = [
"UserName":userNameTF.text!,
"Password":passwordTF.text!,
"UserTypeId":2,
"profilePic":"(arc4random()).png",
"profileImage":base64!,
"DOB":dateOfBirthTF.text!,
"PhoneNumber":phoneNumberTF.text!,
"Mobile":phoneNumberTF.text!,
"Email":emailAddressTF.text!,
"AddressLine1":address1TF.text!,
"AddressLine2":address2TF.text!,
"City":cityTF.text!,
"State":stateTF.text!,
"Country":countryTF.text!,
"ZipCode":zipcodeTF.text!
] as [String : Any]
希望这有效!