使用Firebase和SD Web图像。因此，此代码可以正常工作，但它总是具有需要花费很长时间加载的2或3个散乱图像？我可能是错的，但是当我不在屏幕上滚动时，加载速度可能会变慢。这可能只是一个错误的判断，但这是我观察到的。
class peopleWhoLikedMe: UITableViewController, CLLocationManagerDelegate{
let locationManager = CLLocationManager()
var latestLocation: [String: Double]?
let locCoord1 = CLLocation()
@IBOutlet weak var border: UIImageView!
func printPersonInfo(uid: String) {
DispatchQueue.main.async{
print(uid)
let usersRef = Database.database().reference().child("people")
let thisUser = usersRef.child(uid)
thisUser.observeSingleEvent(of: .value, with: { snapshot in
let photoPosts = snapshot.childSnapshot(forPath: "PhotoPosts").value as? String ?? "No PhotoPosts"
let education = snapshot.childSnapshot(forPath: "Education").value as? String ?? "No Education"
let whatIamConsideringBuying = snapshot.childSnapshot(forPath: "WhatIamConsideringBuying").value as? String ?? "No WhatIamConsideringBuying"
print(photoPosts, education, whatIamConsideringBuying)
let p = Usery(education: education, whatIamConsideringBuying: whatIamConsideringBuying, photoPosts: photoPosts)
self.person.insert(p, at: 0)
self.table.reloadData()
})
}
}
var immy: UIImage!
var imageURLs = [String]()
var refArtists : DatabaseReference!
@IBOutlet weak var table: UITableView!
var people = [Userx]()
var person = [Usery]()
public override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return person.count
}
public override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! ViewControllerTableViewCell
let immy = cell.viewWithTag(2) as! UIImageView
let person1: Usery = person[indexPath.row]
cell.lblName1.text = person1.education
cell.lblgenre1.text = person1.whatIamConsideringBuying
if let photoPosts = person1.photoPosts {
let url = URL(string: photoPosts)
immy.sd_setImage(with: url)
}
return cell
}
以上是我认为唯一的相关代码。我只是添加以下内容，以防丢失某些内容。
refArtists.observe(DataEventType.value, with: {snapshot in
if snapshot.childrenCount>0{
self.people.removeAll()
for people in snapshot.children.allObjects as! [DataSnapshot] {
if people.key != thisUsersUid { //do not add this users info to the array
let peopleObject = people.value as? [String: AnyObject]
let peopleEducation = peopleObject?["Education"] as? String
let peopleWhatIamConsideringBuying = peopleObject?["WhatIamConsideringBuying"] as? String
let peoplePhotoPosts = peopleObject?["PhotoPosts"] as? String
let peopleimageDownloadURL = peopleObject?["imageDownloadURL"] as? String
let peoplepostID = peopleObject?["postID"] as? String
let peoplecaption = peopleObject?["caption"] as? Int
let peoplepeopleWhoLike = peopleObject?["peopleWhoLike"] as? String
let peopleCoordinates = peopleObject?["Coordinates"] as? String
///belowIsJustJunkCode
let userId = people.key
let coordSnap = people.childSnapshot(forPath: "Coordinates")
let lat = coordSnap.childSnapshot(forPath: "latitude").value as! CLLocationDegrees
let lon = coordSnap.childSnapshot(forPath: "longitude").value as! CLLocationDegrees
let locCoord = CLLocation(latitude: lat, longitude: lon)
print(userId, "coords: \(lat) \(lon)")
let distance = locCoord.distance(from: self.locCoord1)
print(distance, "distance")
let peopl = Userx(Education: peopleEducation, WhatIamConsideringBuying: peopleWhatIamConsideringBuying, PhotoPosts: peoplePhotoPosts, imageDownloadURL: peopleimageDownloadURL, postID: peoplepostID, peopleWhoLike: peoplepeopleWhoLike, Coordinates: peopleCoordinates, distance:distance, caption: peoplecaption)
self.people.append(peopl)