[swift]画像を非同期でロードするextensions - Qiitaextension UIImage { class func loadAsyncFromURL(urlString: String, callback: (UIImage?) -> ()) { dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), { let url = NSURL(string: urlString) var err: NSError? let imageData = NSData(contentsOfURL: url!, options: NSDataReadingOptions.DataReadingMappedIfSafe, error: &err) var image: UIImage? if let _data = imageData { image = UII
![[swift]画像を非同期でロードするextensions - Qiita](https://cdn-ak-scissors.b.st-hatena.com/image/square/60e4f35d5ba1b9a70101cbf199370061f2dc169f/height=288;version=1;width=512/https%3A%2F%2Fqiita-user-contents.imgix.net%2Fhttps%253A%252F%252Fqiita-user-contents.imgix.net%252Fhttps%25253A%25252F%25252Fcdn.qiita.com%25252Fassets%25252Fpublic%25252Farticle-ogp-background-afbab5eb44e0b055cce1258705637a91.png%253Fixlib%253Drb-4.0.0%2526w%253D1200%2526blend64%253DaHR0cHM6Ly9xaWl0YS11c2VyLXByb2ZpbGUtaW1hZ2VzLmltZ2l4Lm5ldC9odHRwcyUzQSUyRiUyRnFpaXRhLWltYWdlLXN0b3JlLnMzLmFtYXpvbmF3cy5jb20lMkYwJTJGNTIwNTQlMkZwcm9maWxlLWltYWdlcyUyRjE0NzM2OTI2MjU_aXhsaWI9cmItNC4wLjAmYXI9MSUzQTEmZml0PWNyb3AmbWFzaz1lbGxpcHNlJmZtPXBuZzMyJnM9ZmFjOGRiNWYwZmVhM2IzNjE5OWUwNTE4NmM5NGJmNWE%2526blend-x%253D120%2526blend-y%253D467%2526blend-w%253D82%2526blend-h%253D82%2526blend-mode%253Dnormal%2526s%253D18024d58d125d39a239342db2cf96d04%3Fixlib%3Drb-4.0.0%26w%3D1200%26fm%3Djpg%26mark64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTk2MCZoPTMyNCZ0eHQ9JTVCc3dpZnQlNUQlRTclOTQlQkIlRTUlODMlOEYlRTMlODIlOTIlRTklOUQlOUUlRTUlOTAlOEMlRTYlOUMlOUYlRTMlODElQTclRTMlODMlQUQlRTMlODMlQkMlRTMlODMlODklRTMlODElOTklRTMlODIlOEJleHRlbnNpb25zJnR4dC1hbGlnbj1sZWZ0JTJDdG9wJnR4dC1jb2xvcj0lMjMxRTIxMjEmdHh0LWZvbnQ9SGlyYWdpbm8lMjBTYW5zJTIwVzYmdHh0LXNpemU9NTYmdHh0LXBhZD0wJnM9N2RkNDZmYmM4ZTZlNTJiMGRlYTUyNzEzY2U4MmI3N2I%26mark-x%3D120%26mark-y%3D112%26blend64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTgzOCZoPTU4JnR4dD0lNDBLZWl0YU1vcm9taXphdG8mdHh0LWNvbG9yPSUyMzFFMjEyMSZ0eHQtZm9udD1IaXJhZ2lubyUyMFNhbnMlMjBXNiZ0eHQtc2l6ZT0zNiZ0eHQtcGFkPTAmcz1mNDhiZjI4YzE1YzBkZTc4Y2NhMTJkM2FkMzE0NjljMQ%26blend-x%3D242%26blend-y%3D480%26blend-w%3D838%26blend-h%3D46%26blend-fit%3Dcrop%26blend-crop%3Dleft%252Cbottom%26blend-mode%3Dnormal%26s%3D71830a96dfe9e61473291c689d8dd927)
