检测应用是否从推送通知启动/打开
是否有可能知道应用程序是否从推送通知启动/打开？
我想这个发布会可以在这里抓到：
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
if (launchOptions != nil) {
// Launched from push notification
NSDictionary *notification = [launchOptions objectForKey:UIApplicationLaunchOptionsRemoteNotificationKey];
}
}
但是，当应用程序在后台时，如何才能检测到它是从推送通知中打开的？
请参阅此代码：
- (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo
{
if ( application.applicationState == UIApplicationStateInactive || application.applicationState == UIApplicationStateBackground )
{
//opened from a push notification when the app was on background
}
}
与...一样
-(void)application:(UIApplication *)application didReceiveLocalNotification (UILocalNotification *)notification
晚但可能有用
当应用程序未运行时
叫做 ..
你需要检查推送通知
NSDictionary *notification = [launchOptions objectForKey:UIApplicationLaunchOptionsRemoteNotificationKey];
if (notification) {
NSLog(@"app recieved notification from remote%@",notification);
[self application:application didReceiveRemoteNotification:notification];
} else {
NSLog(@"app did not recieve notification");
}
这是一个很老的帖子......但它仍然缺少解决问题的实际办法 （正如各种评论所指出的那样）。
原始问题是关于通过推送通知来检测应用何时启动 / 打开 ，例如用户点击通知。 没有一个答案实际上涵盖了这种情况。
原因可以在通知到达时在呼叫流程中看到， application:didReceiveRemoteNotification...
当接到通知时再通知是由用户点击被调用。 正因为如此，用户只需查看UIApplicationState就可以知道用户点击了它。
此外，您不再需要处理应用程序在application:didFinishLaunchingWithOptions...中的“冷启动”情况application:didFinishLaunchingWithOptions...作为application:didReceiveRemoteNotification...在iOS 9+（也可能是8）中启动后再次调用。
那么，你怎么知道用户点击是否开始了事件链？ 我的解决方案是标记应用程序开始走出背景或冷启动的时间，然后在application:didReceiveRemoteNotification...检查时间application:didReceiveRemoteNotification... 如果它小于0.1s，那么你可以很确定龙头触发了启动。
Swift 2.x
class AppDelegate: UIResponder, UIApplicationDelegate {
var wakeTime : NSDate = NSDate() // when did our application wake up most recently?
func applicationWillEnterForeground(application: UIApplication) {
// time stamp the entering of foreground so we can tell how we got here
wakeTime = NSDate()
}
func application(application: UIApplication, didReceiveRemoteNotification userInfo: [NSObject : AnyObject], fetchCompletionHandler completionHandler: (UIBackgroundFetchResult) -> Void) {
// ensure the userInfo dictionary has the data you expect
if let type = userInfo["type"] as? String where type == "status" {
// IF the wakeTime is less than 1/10 of a second, then we got here by tapping a notification
if application.applicationState != UIApplicationState.Background && NSDate().timeIntervalSinceDate(wakeTime) < 0.1 {
// User Tap on notification Started the App
}
else {
// DO stuff here if you ONLY want it to happen when the push arrives
}
completionHandler(.NewData)
}
else {
completionHandler(.NoData)
}
}
}
斯威夫特3
class AppDelegate: UIResponder, UIApplicationDelegate {
var wakeTime : Date = Date() // when did our application wake up most recently?
func applicationWillEnterForeground(_ application: UIApplication) {
// time stamp the entering of foreground so we can tell how we got here
wakeTime = Date()
}
func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any], fetchCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) {
// ensure the userInfo dictionary has the data you expect
if let type = userInfo["type"] as? String, type == "status" {
// IF the wakeTime is less than 1/10 of a second, then we got here by tapping a notification
if application.applicationState != UIApplicationState.background && Date().timeIntervalSince(wakeTime) < 0.1 {
// User Tap on notification Started the App
}
else {
// DO stuff here if you ONLY want it to happen when the push arrives
}
completionHandler(.newData)
}
else {
completionHandler(.noData)
}
}
}
我已经在iOS 9+上对这两种情况（应用程序在后台，应用程序未运行）进行了测试，并且它像魅力一样起作用。 0.1s也相当保守，实际值为〜0.002s，所以0.01也很好。
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