我在我的应用程序中使用推送通知服务。当应用程序在后台时，我能够在通知屏幕上看到通知(当我们从iOS设备顶部向下滑动时显示的屏幕)。但如果应用程序是在前台的委托方法
- (void)application:(UIApplication*)application didReceiveRemoteNotification:(NSDictionary*)userInfo
正在被调用，但通知屏幕上没有显示通知。
我想在通知屏幕上显示通知，不管应用程序是在后台还是前台。我厌倦了寻找解决办法。任何帮助都非常感激。
当前回答
当应用程序在前台显示横幅消息时，使用以下方法。
iOS 10, Swift 3/4:
// This method will be called when app received push notifications in foreground
func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void)
{
completionHandler([.alert, .badge, .sound])
}
iOS 10, Swift 2.3:
@available(iOS 10.0, *)
func userNotificationCenter(center: UNUserNotificationCenter, willPresentNotification notification: UNNotification, withCompletionHandler completionHandler: (UNNotificationPresentationOptions) -> Void)
{
//Handle the notification
completionHandler(
[UNNotificationPresentationOptions.Alert,
UNNotificationPresentationOptions.Sound,
UNNotificationPresentationOptions.Badge])
}
你还必须将你的应用委托注册为通知中心的委托:
import UserNotifications
// snip!
class AppDelegate : UIResponder, UIApplicationDelegate, UNUserNotificationCenterDelegate
// snip!
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
// set the delegate in didFinishLaunchingWithOptions
UNUserNotificationCenter.current().delegate = self
...
}
其他回答
当应用程序在前台显示横幅消息时，使用以下方法。
iOS 10, Swift 3/4:
// This method will be called when app received push notifications in foreground
func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void)
{
completionHandler([.alert, .badge, .sound])
}
iOS 10, Swift 2.3:
@available(iOS 10.0, *)
func userNotificationCenter(center: UNUserNotificationCenter, willPresentNotification notification: UNNotification, withCompletionHandler completionHandler: (UNNotificationPresentationOptions) -> Void)
{
//Handle the notification
completionHandler(
[UNNotificationPresentationOptions.Alert,
UNNotificationPresentationOptions.Sound,
UNNotificationPresentationOptions.Badge])
}
你还必须将你的应用委托注册为通知中心的委托:
import UserNotifications
// snip!
class AppDelegate : UIResponder, UIApplicationDelegate, UNUserNotificationCenterDelegate
// snip!
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
// set the delegate in didFinishLaunchingWithOptions
UNUserNotificationCenter.current().delegate = self
...
}
对于任何可能感兴趣的人来说，我最终创建了一个自定义视图，看起来像顶部的系统推送横幅，但添加了一个关闭按钮(小蓝色X)和一个点击消息进行自定义操作的选项。它还支持在用户有时间阅读/删除旧通知之前到达多个通知的情况(没有限制可以堆积多少…)
链接到GitHub: AGPushNote
用法基本上是在线的:
[AGPushNoteView showWithNotificationMessage:@"John Doe sent you a message!"];
在iOS7上看起来是这样的(iOS6有一个iOS6的外观和感觉…)
如果应用程序在前台运行，iOS不会显示通知横幅/警报。这是故意的。你必须编写一些代码来处理应用程序在前台接收通知的情况。您应该以最合适的方式显示通知(例如，向UITabBar图标添加徽章号，模拟notification Center横幅等)。
您可以创建自己的通知，模仿横幅警报。
一种方法是创建一个自定义的uiview，看起来像横幅，可以动画和响应触摸。考虑到这一点，你可以创建更好的横幅，甚至更多的功能。
或者你可以寻找一个api来帮你做这件事，并把它们作为podfile添加到你的项目中。
以下是我使用过的一些方法:
https://github.com/terryworona/TWMessageBarManager
https://github.com/toursprung/TSMessages
用于swift 5解析推送通知字典
func application(_ application: UIApplication, didReceiveRemoteNotification data: [AnyHashable : Any]) {
if application.applicationState == .active {
if let aps1 = data["aps"] as? NSDictionary {
if let dict = aps1["alert"] as? NSDictionary {
if let strTitle = dict["title"] as? String , let strBody = dict["body"] as? String {
if let topVC = UIApplication.getTopViewController() {
//Apply your own logic as per requirement
print("strTitle ::\(strTitle) , strBody :: \(strBody)")
}
}
}
}
}
}
获取topBanner所在的top viewController
extension UIApplication {
class func getTopViewController(base: UIViewController? = UIApplication.shared.keyWindow?.rootViewController) -> UIViewController? {
if let nav = base as? UINavigationController {
return getTopViewController(base: nav.visibleViewController)
} else if let tab = base as? UITabBarController, let selected = tab.selectedViewController {
return getTopViewController(base: selected)
} else if let presented = base?.presentedViewController {
return getTopViewController(base: presented)
}
return base
}
}
