Download images using Alamofire and display in UITableViewCell - ios

Question

I have these two functions:
func callAlamo(url: String){
Alamofire.request(url).responseJSON(completionHandler: {
response in
self.parseData(JSONData: response.data!)
})
}
func parseData(JSONData: Data) {
do {
var readableJSON = try JSONSerialization.jsonObject(with: JSONData, options: .mutableContainers) as! JSONStandard
if let tracks = readableJSON["tracks"] as? JSONStandard{
if let items = tracks["items"] as? [JSONStandard]{
for i in 0..<items.count{
let item = items[i]
let name = item["name"] as! String
if let album = item["album"] as? JSONStandard{
if let images = album["images"] as? [JSONStandard]{
let imageData = images[0]
let mainImageUrl = URL(string: imageData["url"] as! String)
let mainImageData = NSData(contentsOf: mainImageUrl!)
let mainImage = UIImage(data: mainImageData as! Data)
posts.append(post.init(image: mainImage, name: name))
self.tableView.reloadData()
}
}
}
}
}
}
catch{
print(error)
}
}
That retrieve song information from Spotify using alamofire. These functions are set up inside of a UITableViewController class. I have a separate UITableViewCell class set up in the same file where I set up this image:
let albumCoverImageView: UIImageView = {
let imageView = UIImageView()
imageView.translatesAutoresizingMaskIntoConstraints = false
return imageView
}()
How would I use get the retrieved information from the two functions into that image? Because I cannot access the functions from inside the image imitation.

Answer 1

Use "SDWebImage" library for downloading images asynchronously.
Refer below link :-
https://github.com/rs/SDWebImage
Usage :-
Objective-C:
#import <SDWebImage/UIImageView+WebCache.h>
[imageView sd_setImageWithURL:[NSURL
URLWithString:imageURL]
placeholderImage:[UIImage imageNamed:#"placeholder.png"]];
Swift:
import SDWebImage
imageView.sd_setImage(with: URL(string: imageURL), placeholderImage: UIImage(named: "placeholder.png"))

Answer 2

var imgFinal = [String:UIImage]()
Store your images in "imgFinal" array in func parseData():
self.imgArrList[i] = imageData["url"]
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as! CategoryTableViewCell
load_image((imgArrList[indexPath.row] as? String)!, imageview: cell.titleImage, indVal: indexPath.row)
return cell
}
Add this method to download image:
func load_image(link:String, imageview:UIImageView, indVal:Int)
{
let url:NSURL = NSURL(string: link)!
let session = NSURLSession.sharedSession()
let request = NSMutableURLRequest(URL: url)
request.timeoutInterval = 10
let task = session.dataTaskWithRequest(request) {
(
let data, let response, let error) in
guard let _:NSData = data, let _:NSURLResponse = response where error == nil else {
return
}
var image = UIImage(data: data!)
if (image != nil)
{
func set_image()
{
//self.images_cache[link] = image
self.imgFinal[link] = image
imageview.image = image
}
dispatch_async(dispatch_get_main_queue(), set_image)
}
}
task.resume()
}