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ImageViewController.swift
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ImageViewController.swift
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//
// ImageViewController.swift
// netfox_ios_demo
//
// Created by Nathan Jangula on 10/12/17.
// Copyright © 2017 kasketis. All rights reserved.
//
import UIKit
class ImageViewController: UIViewController {
@IBOutlet weak var imageView: UIImageView!
var session: URLSession?
var dataTask: URLSessionDataTask?
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}
@IBAction func tappedLoadImage(_ sender: Any) {
dataTask?.cancel()
if session == nil {
session = URLSession(configuration: URLSessionConfiguration.default)
}
if let url = URL(string: "https://picsum.photos/\(Int(imageView.frame.size.width))/\(Int(imageView.frame.size.height))") {
dataTask = session?.dataTask(with: url, completionHandler: { (data, response, error) in
if let error = error {
self.handleCompletion(error: error.localizedDescription, data: data)
} else {
guard let data = data else { self.handleCompletion(error: "Invalid data", data: nil); return }
guard let response = response as? HTTPURLResponse else { self.handleCompletion(error: "Invalid response", data: data); return }
guard response.statusCode >= 200 && response.statusCode < 300 else { self.handleCompletion(error: "Invalid response code", data: data); return }
self.handleCompletion(error: error?.localizedDescription, data: data)
}
})
dataTask?.resume()
}
}
private func handleCompletion(error: String?, data: Data?) {
DispatchQueue.main.async {
if let error = error {
NSLog(error)
return
}
if let data = data {
let image = UIImage(data: data)
NSLog("\(image?.size.width ?? 0),\(image?.size.height ?? 0)")
self.imageView.image = image
}
}
}
}