UITableView用メソッドの追加

Author: pixel-ink

PIImageCache/PIImageCache/PIImageCache.swift

@@ -65,6 +65,16 @@ public class PIImageCache {
       }
     }
   }
+
+  public func getWithId(url: NSURL, id: Int, then: (id: Int, image: UIImage?) -> Void) {
+    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)) {
+      [weak self] in
+      let image = self?.get(url)
+      dispatch_async(dispatch_get_main_queue()) {
+        then(id: id, image: image)
+      }
+    }
+  }
 
   public func prefetch(urls: [NSURL]) {
     for url in urls {

PIImageCache/PIImageCache/TableViewController.swift

@@ -4,6 +4,7 @@ import UIKit
 class TableViewCell : UITableViewCell {
   @IBOutlet weak var icon: UIImageView!
   @IBOutlet weak var body: UILabel!
+  var id:Int!
 }
 
 class TableViewController : UITableViewController {
@@ -19,8 +20,14 @@ class TableViewController : UITableViewController {
     cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
       let cell: TableViewCell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as! TableViewCell
       let i = indexPath.row
+      cell.id = i
       let url = NSURL(string: "http://lorempixel.com/200/200/" + lormpixelCategory[i] )!
-      cell.icon.imageOfURL(url)
+      PIImageCache.shared.getWithId(url, id: i) {
+        [weak self] id, image in
+        if id == cell.id {
+          cell.icon.image = image
+        }
+      }
       cell.body.text = lormpixelCategory[i]
       return cell
   }

README.md

@@ -86,6 +86,25 @@ let cache = PIImageCache.shared
 cache.prefetch(url)
 ```
 
+### downloadWithId
+
+set id, callback image with the id.
+
+useful for UITableViewCell
+
+```
+// example: code in cellForRowAtIndexPath
+let url = NSURL(string: "http://lorempixel.com/200/200/" )!
+let id = indexPath.row
+cell.id = indexPath.row
+PIImageCache.shared.getWithId(url, id: i) {
+  [weak self] id, image in
+  if id == cell.id {
+    cell.icon.image = image
+  }
+}
+```
+
 ### configurable
 
 ```Config.swift