// 监听通知
NotificationCenter.default.addObserver(self, selector: #selector(LibraryAPI.downloadImage(_:)), name: NSNotification.Name(rawValue: downloadImageNotification), object: nil)
// 网络下载和主线程刷新UI
DispatchQueue.global().async {
let image = self.xiaZaiTuPianWithUrl(imageUrl)
DispatchQueue.main.async {
myImageView?.image = image
self.persistencyManager.baoCunTuPian(image, fileName: URL(string: imageUrl)!.lastPathComponent)
}
}
// 文件本地目录
let path = NSHomeDirectory() + "/Documents/(filename)"
// 枚举
enum PokeType {
case normal
case fire
case water
}
// KVO
myImgView.addObserver(self, forKeyPath: "image", options: [], context: nil)
override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
if keyPath == "image" {
indicator.stopAnimating()
}
}
//
topViewController
(controllers[controllers.count-1] as! UINavigationController).topViewController as? DetailViewController
// didSet
var detailItem: NSDate? {
didSet {
// Update the view.
configureView()
}
}