1 [[UIApplication sharedApplication] setMinimumBackgroundFetchInterval:UIApplicationBackgroundFetchIntervalMinimum]; 1. 这个可以让系统决定何时应该展示新内容。MinimumBackgroundFetchInterval参数值是时间间隔的数值,系统保证两次Fetch的时间间隔不会小于这个值,不能保证每隔这个时间间隔都会调用。这里设置为UIApplicationBac...
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1- (void)insertNewObjectForFetchWithCompletionHandler:(void(^)(UIBackgroundFetchResult))completionHandler {2NSLog(@"Update the tableview.");3self.numberOfnewPosts = [self getRandomNumberBetween:0to:4];4NSLog(@"%d new fetched objects",self.numberOfnewPosts);5for(inti =0; i < self.numberOf...
UIBackgroundFetchResult Constants that indicate the result of a background fetch operation. iOS 7.0+iPadOS 7.0+Mac Catalyst 13.1+tvOS 9.0+visionOS 1.0+ enumUIBackgroundFetchResult:UInt, @uncheckedSendable Topics Constants casenewData New data was successfully downloaded. ...
1. 点击Target下的Capabilities ->>Background Modes ->>Background fetch 打钩。 2. 设置fetch最短间隔 可以直接在AppDelegate里面的- (BOOL)application:(UIApplication*)application didFinishLaunchingWithOptions:(NSDictionary*)launchOptions 方法内加上
第一种:在 Edit Scheme -> Run -> Options -> 勾选Launch due to a background fetch event Edit Scheme Launch due to a background fetch event 第二种:直接在 Xcode 菜单栏 Debug -> Simulate Background Fetch 进行模拟 Debug 以上就是一个简单的后台刷新功能的开发和调试,再复杂的功能也是同样的思路...
Hi, in a task defined like that: TaskManager.defineTask(BACKGROUND_FETCH_TASK, async () => { const now = isoDate(); console.info('Background fetch task executed'); LogService.write('info', `Background fetch task executed at ${now}`); try...
一，开启Background Fetch支持 在XCode->TARGETS->Capabilities->Background Modes打开并添加Background Fetch.同时在- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions方法中添加:[[UIApplication sharedApplication] setMinimumBackgroundFetchInterval:UI...
fetchCompletionHandler:(void(^)(UIBackgroundFetchResult))completionHandler 这个方法是应用在后台接收到推送的回调,在这方法里可以编写我们的后台操作代码,关于这里的代码我是这样写的: image.png 这里有一个需要注意的是: completionHandler(UIBackgroundFetchResultNewData); ...
performFetchWithCompletionHandler ...is Deprecated in iOS 13. I'm looking for simple example code for retro-fitting my code for background URL sessions to be compatible with iOS 13. My app uses Background Fetch to grab repeating updates of web data whenever the app is in the background. ...