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
正如@Danial Martine所说，iOS不会显示通知横幅/提醒。这是故意的。但如果真要这么做，还有一个办法。我也用同样的方法做到了这一点。
1.从parse FrameWork下载解析框架
2.导入# Import <Parse/Parse.h> .h
3.将以下代码添加到您的didReceiveRemoteNotification方法
- (void)application:(UIApplication *)application
didReceiveRemoteNotification:(NSDictionary *)userInfo
{
[PFPush handlePush:userInfo];
}
PFPush会注意如何处理远程通知。如果App在前台，这显示警报，否则它显示在顶部的通知。
其他回答
下面的代码将为您工作:
- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo {
application.applicationIconBadgeNumber = 0;
//self.textView.text = [userInfo description];
// We can determine whether an application is launched as a result of the user tapping the action
// button or whether the notification was delivered to the already-running application by examining
// the application state.
if (application.applicationState == UIApplicationStateActive) {
// Nothing to do if applicationState is Inactive, the iOS already displayed an alert view.
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Did receive a Remote Notification" message:[NSString stringWithFormat:@"Your App name received this notification while it was running:\n%@",[[userInfo objectForKey:@"aps"] objectForKey:@"alert"]]delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
[alertView show];
}
}
也适用于iOS 14+，不需要手动处理任何警报或视图，只需让iOS做它的事情
在里面，我们重新收到通知替换如下代码
func userNotificationCenter(
_ center: UNUserNotificationCenter,
willPresent notification: UNNotification,
withCompletionHandler completionHandler:
@escaping (UNNotificationPresentationOptions) -> Void
) {
if (UIApplication.shared.applicationState == .inactive || UIApplication.shared.applicationState == .background) {
if #available(iOS 14.0, *) {
completionHandler([[.banner, .sound]])
} else {
completionHandler([.alert, .sound])
}
} else {
if #available(iOS 14.0, *) {
completionHandler([[.banner]])
} else {
completionHandler([.alert])
}
}
}
要注意的主要事情是不要使用声音，而在前景，它不会显示横幅
iOS 14 +
下面这个答案有一个不同之处，.alert已弃用，使用.banner:
class AppDelegate: NSObject, UIApplicationDelegate, UNUserNotificationCenterDelegate {
func application(
_ application: UIApplication,
didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil
) -> Bool {
UNUserNotificationCenter.current().delegate = self
return true
}
func userNotificationCenter(
_ center: UNUserNotificationCenter,
willPresent notification: UNNotification,
withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void
) {
completionHandler([.banner, .badge, .sound])
}
}
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
}
}
添加completionHandler行委托方法为我解决了同样的问题:
//Called when a notification is delivered to a foreground app.
@available(iOS 10.0, *)
func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
completionHandler([.alert, .badge, .sound])
}
