一、有参数的观察者模式：
<1>传递Object对象参数：
0.观察者对象宏定义：
let kAliPayNotificationName = Notification.Name("aliPayNotification")// 支付宝支付结果通知
let kAliPaySuccessNotificationObject = "aliPaySuccess" //支付成功
let kAliPayFailNotificationObject = "aliPayFail" //支付失败
1.添加观察者 & 监听方法实现 & 移除观察者：
//（1）添加支付宝支付结果观察者
NotificationCenter.default.addObserver(self, selector: #selector(aliPayNotificationAction(notification:)), name: kAliPayNotificationName, object: nil)
//（2）接收到通知的方法-支付宝支付结果
func aliPayNotificationAction(notification:Notification) {
guard notification.object != nil else {
return
}
if let notificationObjectStr = notification.object! as? String {
if (notificationObjectStr == kAliPaySuccessNotificationObject) {
print("支付成功！")
self.title = "支付成功"
self.view.addSubview(self.paySuccessView)
self.view.bringSubview(toFront: self.paySuccessView)
} else if (notificationObjectStr == kAliPayFailNotificationObject) {
print("支付失败！")
self.title = "支付失败"
self.view.addSubview(self.payFailView)
self.view.bringSubview(toFront: self.payFailView)
} else {
return
}
}
}
//（3）移除观察者
deinit {
NotificationCenter.default.removeObserver(self)
}
3.发送通知：
if resultStatus == "9000" {//支付成功
NotificationCenter.default.post(name: kAliPayNotificationName, object: kAliPaySuccessNotificationObject)
} else {//支付失败
NotificationCenter.default.post(name: kAliPayNotificationName, object: kAliPayFailNotificationObject)
}
<2>传递userInfo参数：
0.观察者对象宏定义：
let kChineseAudioPlayPlayModelCheckNotice = Notification.Name("kChineseAudioPlayPlayModelCheckNotice")//音频播放方式切换的通知
1.添加观察者 & 监听方法实现 & 移除观察者：
//添加观察者
NotificationCenter.default.addObserver(self, selector: #selector(sequenceTypeCheckNoticeAction(notification:)), name: kChineseAudioPlaySequenceTypeCheckNotice, object: nil)
//MARK: - 观察者监听方法
func sequenceTypeCheckNoticeAction(notification:Notification) {
guard notification.userInfo != nil else {
return
}
if let notificationUserInfoDict = notification.userInfo! as? [String: AnyObject] {
if let value = notificationUserInfoDict["playMode"] as? Int {
self.sequenceType = AudioSequenceType(rawValue: value) ?? .order
self.tableView.mj_header.beginRefreshing()
}
}
return
}
deinit {
//移除观察者
NotificationCenter.default.removeObserver(self)
}
3.发送通知：
//发送通知
NotificationCenter.default.post(name: kChineseAudioPlayPlayModelCheckNotice, object: nil, userInfo: ["playMode": playMode.rawValue])
二、无参数的观察者模式：
let kloginSuccessNotice = Notification.Name("BookRoomRefreshData")
//发送通知
NotificationCenter.default.post(name: kloginSuccessNotice, object: nil)
//添加观察者
NotificationCenter.default.addObserver(self, selector: #selector(loginSuccessAction), name: kloginSuccessNotice, object: nil)
//在添加观察者VC，实现监测到通知后的动作方法
func loginSuccessAction() {
loadData()
}
//销毁观察者
deinit {
NotificationCenter.default.removeObserver(self)
}
三、添加系统通知的观察者：
//添加系统通知的观察者
NotificationCenter.default.addObserver(self, selector: #selector(didEnterBackground), name: NSNotification.Name.UIApplicationDidEnterBackground, object: nil )
