用户将图像上传到firebase存储并将url字符串添加到firebase数据库中, 如何获取 firebase 数据库中的字符串并将其转换为 uiimage 以将其用作图像?
从数据库返回的字符串是这样的:
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cellID") as! NewMessageCell
let user = users[indexPath.row]
cell.textLabel?.text = user.username
cell.detailTextLabel?.text = user.email
let currentID = Auth.auth().currentUser?.uid
let databaseRef = Database.database().reference().child("users").child(currentID!)
databaseRef.observe(.value) { (data) in
let dictinoray = data.value as? [String: AnyObject]
let profileImage = dictinoray!["profileimage"] as! String
cell.imageView?.image = profileImage.toImage()
print(profileImage)
}
return cell
}
扩展
extension String {
func toImage() -> UIImage? {
if let data = Data(base64Encoded: self, options: .ignoreUnknownCharacters){
return UIImage(data: data)
}
return nil
}
}
最佳答案
我通过映射和使用存储 downloadurl 使用其他方式,它起作用了
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cellID") as! NewMessageCell
let user = users[indexPath.row]
cell.textLabel?.text = user.username
cell.detailTextLabel?.text = user.email
let storageref = Storage.storage().reference().child(user.userid)
storageref.downloadURL { (imgurl, er) in
let imagedata = try? Data.init(contentsOf: imgurl!)
cell.imageView?.layer.cornerRadius = (cell.imageView?.frame.size.width)!/2
cell.imageView?.image = UIImage.init(data: imagedata!)
}
关于swift - 将个人资料图像字符串从 firebase 数据库下载到 uiimage,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/54020257/