我正在尝试将图像保存到Dropbox。当我使用此行时：self.dbRestClient.uploadFile(uploadFilename, toPath: destinationPath, withParentRev: nil, fromPath: sourcePath)
错误：
类型为“NSObject->（）->ViewController”的值没有成员
“dbRestClient”。
这是我的代码：
import UIKit
class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource, DBRestClientDelegate {
@IBOutlet weak var tblFiles: UITableView!
@IBOutlet weak var bbiConnect: UIBarButtonItem!
@IBOutlet weak var progressBar: UIProgressView!
var dbRestClient: DBRestClient!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
tblFiles.delegate = self
tblFiles.dataSource = self
progressBar.hidden = true
NSNotificationCenter.defaultCenter().addObserver(self, selector: "handleDidLinkNotification:", name: "didLinkToDropboxAccountNotification", object: nil)
if DBSession.sharedSession().isLinked() {
bbiConnect.title = "Disconnect"
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// MARK: IBAction method implementation
@IBAction func connectToDropbox(sender: AnyObject) {
if !DBSession.sharedSession().isLinked() {
DBSession.sharedSession().linkFromController(self)
}
else {
DBSession.sharedSession().unlinkAll()
bbiConnect.title = "Connect"
dbRestClient = nil
}
if DBSession.sharedSession().isLinked() {
bbiConnect.title = "Disconnect"
}
}
@IBAction func performAction(sender: AnyObject) {
if !DBSession.sharedSession().isLinked() {
print("You're not connected to Dropbox")
return
}
let actionSheet = UIAlertController(title: "Upload file", message: "Select file to upload", preferredStyle: UIAlertControllerStyle.ActionSheet)
let uploadTextFileAction = UIAlertAction(title: "Upload text file", style: UIAlertActionStyle.Default) { (action) -> Void in
}
let uploadImageFileAction = UIAlertAction(title: "Upload image", style: UIAlertActionStyle.Default) { (action) -> Void in
}
let cancelAction = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Cancel) { (action) -> Void in
}
actionSheet.addAction(uploadTextFileAction)
actionSheet.addAction(uploadImageFileAction)
actionSheet.addAction(cancelAction)
presentViewController(actionSheet, animated: true, completion: nil)
}
@IBAction func reloadFiles(sender: AnyObject) {
}
// MARK: UITableview method implementation
func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 0
}
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = UITableViewCell()
return cell
}
func tableView(tableView: UITableView, heightForRowAtIndexPath indexPath: NSIndexPath) -> CGFloat {
return 0.0
}
func handleDidLinkNotification(notification: NSNotification) {
initDropboxRestClient()
bbiConnect.title = "Disconnect"
}
func initDropboxRestClient() {
dbRestClient = DBRestClient(session: DBSession.sharedSession())
dbRestClient.delegate = self
}
let uploadTextFileAction = UIAlertAction(title: "Upload text file", style: UIAlertActionStyle.Default) { (action) -> Void in
let uploadFilename = "testtext.txt"
let sourcePath = NSBundle.mainBundle().pathForResource("testtext", ofType: "txt")
let destinationPath = "/"
self.dbRestClient.uploadFile(uploadFilename, toPath: destinationPath, withParentRev: nil, fromPath: sourcePath)
}
let uploadImageFileAction = UIAlertAction(title: "Upload image", style: UIAlertActionStyle.Default) { (action) -> Void in
let uploadFilename = "nature.jpg"
let sourcePath = NSBundle.mainBundle().pathForResource("nature", ofType: "jpg")
let destinationPath = "/"
self.dbRestClient.uploadFile(uploadFilename, toPath: destinationPath, withParentRev: nil, fromPath: sourcePath)
}
func restClient(client: DBRestClient!, uploadedFile destPath: String!, from srcPath: String!, metadata: DBMetadata!) {
print("The file has been uploaded.")
print(metadata.path)
}
func restClient(client: DBRestClient!, uploadFileFailedWithError error: NSError!) {
print("File upload failed.")
print(error.description)
}
}
我不知道为什么会这样。有什么想法吗？
最佳答案
将访问selflikeself.dbRestClient的常量更改为lazy var。只有惰性属性和计算属性才能在初始化时访问self。
第一个看起来像：
lazy var uploadTextFileAction: UIAlertAction = UIAlertAction(title: "Upload text file", style: UIAlertActionStyle.Default) { (action) -> Void in
let uploadFilename = "testtext.txt"
let sourcePath = NSBundle.mainBundle().pathForResource("testtext", ofType: "txt")
let destinationPath = "/"
self.dbRestClient.uploadFile(uploadFilename, toPath: destinationPath, withParentRev: nil, fromPath: sourcePath)
}
关于ios - 类型'NSObject->()-> ViewController'的值没有成员'dbRestClient'，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/38804691/