我正在使用Swift 5，并将MessageKit集成到我的应用程序中。这是预期的功能：
- 用户通过选择器选择图像
- uploadImage函数已启动
- 图像已上传并显示
实际发生的事情：
- 用户通过选择器选择图像
- 从那里什么都没发生。
我没有收到一条错误消息。我已经输入了print语句，以查看它是否甚至正在输入uploadImage（）函数，但尚未启动。我已经将uipickerimagecontroller代码更改为在我应用的其他位置正常运行的确切代码，甚至还没有启动该功能。我知道我的代码不太漂亮，但我仍在学习（请不要判断笑）。谁能帮忙：
可变设置
private var isSendingPhoto = true {
didSet {
DispatchQueue.main.async {
self.messageInputBar.leftStackViewItems.forEach { item in
item.inputBarAccessoryView?.isUserInteractionEnabled = !self.isSendingPhoto
}
}
}
}
ViewDidLoad
messagesCollectionView.messagesDataSource = self
messagesCollectionView.messagesLayoutDelegate = self
messageInputBar.delegate = self as? InputBarAccessoryViewDelegate
messagesCollectionView.messagesDisplayDelegate = self
title = "MaybeDrinks"
// 1
let cameraItem = InputBarButtonItem(type: .system)
cameraItem.tintColor = .primary
cameraItem.image = #imageLiteral(resourceName: "camera")
// 2
cameraItem.addTarget(
self,
action: #selector(cameraButtonPressed),
for: .primaryActionTriggered
)
cameraItem.setSize(CGSize(width: 60, height: 30), animated: false)
messageInputBar.leftStackView.alignment = .center
messageInputBar.setLeftStackViewWidthConstant(to: 50, animated: false)
messageInputBar.setStackViewItems([cameraItem], forStack: .left, animated: false) // 3
}
private func sendPhoto(_ image: UIImage) {
isSendingPhoto = true
uploadImage(image) { [weak self] url in
guard let `self` = self else {
return
}
self.isSendingPhoto = false
guard let url = url else {
return
}
var message = Message(messageuser: self.sender, image: image)
message.downloadURL = url
self.save(message)
self.messagesCollectionView.scrollToBottom()
}
}
func imagePickerController(_ picker: UIImagePickerController,
didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
picker.dismiss(animated: true, completion: nil)
// 1
if let asset = info[.phAsset] as? PHAsset {
let size = CGSize(width: 500, height: 500)
PHImageManager.default().requestImage(
for: asset,
targetSize: size,
contentMode: .aspectFit,
options: nil) { result, info in
print("I'm in image picker")
guard let image = result else {
return
}
self.sendPhoto(image)
}
// 2
} else if let image = info[.originalImage] as? UIImage {
sendPhoto(image)
}
}
func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
picker.dismiss(animated: true, completion: nil)
}
// MARK: - Actions
@objc private func cameraButtonPressed() {
let picker = UIImagePickerController()
picker.delegate = self as? UIImagePickerControllerDelegate & UINavigationControllerDelegate
picker.allowsEditing = true
if UIImagePickerController.isSourceTypeAvailable(.camera) {
picker.sourceType = .camera
} else {
picker.sourceType = .photoLibrary
}
present(picker, animated: true, completion: nil)
}
上传图像功能
private func uploadImage(_ image: UIImage, completion: @escaping (URL?) -> Void) {
print("im in upload")
// STEP 1. Declare URL, Request and Params
let url = URL(string: "https://localhost/messagepost.php")!
// declaring reqeust with further configs
var request = URLRequest(url: url)
// POST - safest method of passing data to the server
request.httpMethod = "POST"
// values to be sent to the server under keys (e.g. ID, TYPE)
let params = ["sender_id": user_id, "uuid": uuid, "sender": me, "recipient_id": rid, "recipient": recipient, "puuid": puuid]
// body
let boundary = "Boundary-\(UUID().uuidString)"
request.setValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type")
// Compressing image and converting image to 'Data' type
guard let scaledImage = image.scaledToSafeUploadSize,
let data = scaledImage.jpegData(compressionQuality: 0.4) else {
return
}
// assigning full body to the request to be sent to the server
request.httpBody = createBodyWithParams(params, filePathKey: "file", imageDataKey: data, boundary: boundary)
print(request.httpBody as Any, "\(puuid).jpg")
URLSession.shared.dataTask(with: request) { (data, response, error) in
DispatchQueue.main.async {
// error occured
if error != nil {
Helper().showAlert(title: "Server Error", message: error!.localizedDescription, in: self)
return
}
do {
// save mode of casting any data
guard let data = data else {
Helper().showAlert(title: "Data Error", message: error!.localizedDescription, in: self)
return
}
// fetching JSON generated by the server - php file
let json = try JSONSerialization.jsonObject(with: data, options: .allowFragments) as? NSDictionary
// save method of accessing json constant
guard let parsedJSON = json else {
return
}
// uploaded successfully
if parsedJSON["status"] as! String == "200" {
let newurl = parsedJSON["path"]
print("did you upload", newurl as Any)
print("did you upload", parsedJSON["message"] as Any)
self.isSendingPhoto = true
guard let url = newurl else {
return
}
//uploadImage(image)
var message = Message(messageuser: self.sender, image: image)
message.downloadURL = url as? URL
self.save(message)
self.messagesCollectionView.scrollToBottom()
} else {
// show the error message in AlertView
if parsedJSON["message"] != nil {
let message = parsedJSON["message"] as! String
Helper().showAlert(title: "Error", message: message, in: self)
print("where am i", parsedJSON["message"] as Any)
}
}
} catch {
Helper().showAlert(title: "JSON Error", message: error.localizedDescription, in: self)
print("where am i 2")
}
}
}.resume()
let imageName = [UUID().uuidString, String(Date().timeIntervalSince1970)].joined()
}
private func save(_ message: Message) {
self.messagesCollectionView.scrollToBottom()
}
确保您的视图控制器在任何一个类声明中都声明同时符合UIImagePickerControllerDelegate和UINavigationControllerDelegate：
class DirectMessageViewController: MessagesViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
[...]
}
或一个或多个扩展名：
extension DirectMessageViewController: UIImagePickerControllerDelegate {
[...]
}
extension DirectMessageViewController: UINavigationControllerDelegate {
[...]
}