gcdasyncsocket后台文件传输 [英] gcdasyncsocket background file transfer
问题描述
有两个设备需要在后台或LockScreen中继续传输数据。
Having two devices that need to keep transferring data while in background or in LockScreen.
The main resource about backgrounding is available on https://developer.apple.com/library/ios/documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/BackgroundExecution/BackgroundExecution.html
到目前为止，我期待了解如何实现这样的上述行为：在场景其中正在进行传输，其中一个应用程序（或两者）进入后台。显然，我们已经完成了可恢复的转移管理工作。
So far I'm looking forward to understand how is it expected to implement such above mentioned behaviour: in a scenario where a transfer is in progress and one of the apps (or both) goes into background. Obviously we have resumable transfer management working already.
我已经收集存根和答案，结果如下：
I've been collecting stubs and answers about and I've ended up with the following:
-
确保每个套接字都是可背景的。
Ensure every socket is backgroundable.
[socket performBlock:^{
[socket enableBackgroundingOnSocket];
}];
为了保持背景，即使在锁定屏幕，我读了一个答案，类似于didFinishLaunchingWithOptions的末尾，但在[self backgroundHandler]方法中有什么代码？
To keep backgrounding even when in Lock Screen, I read an answer saying that we should have something like at the end of didFinishLaunchingWithOptions but what code is in [self backgroundHandler] method?
BOOL backgroundAccepted = [[UIApplication sharedApplication]
setKeepAliveTimeout:600 handler:^{ [self backgroundHandler]; }];
if (backgroundAccepted)
NSLog(@"background handler accepted");
return YES;
UIApplication的applicationDidEnterBackground委托方法显示
The applicationDidEnterBackground delegate method of UIApplication shows
- (void)applicationDidEnterBackground:(UIApplication *)application {
NSLog(@"=== DID ENTER BACKGROUND ===");
if([[UIDevice currentDevice] respondsToSelector:@selector(isMultitaskingSupported)])
NSLog(@"Multitasking Supported");
else
return;
// Shall I remove my KVO observers when in background?? I guess NOT, right? :D
//[[NSNotificationCenter defaultCenter] removeObserver:self];
UIBackgroundTaskIdentifier bgTask = [[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:^{
NSLog(@"End of tolerate time. Application should be suspended now if we do not ask more 'tolerance'");
// [self askToRunMoreBackgroundTask]; This code seems to be unnecessary. I'll verify it.
}];
if (bgTask == UIBackgroundTaskInvalid)
NSLog(@"This application does not support background mode");
else
NSLog(@"Application will continue to run in background");
// Start the long-running task and return immediately.
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
});
推荐答案
我得到它的工作下面的教程，但看起来像GCDAsyncSocket不再维护，所以它只能在iOS7上工作。
I got it working following this tutorial but looks like GCDAsyncSocket is no longer maintained so it will work only on iOS7.
http://www.objc.io/issue-5/multitasking.html
在iOS 8下执行背景文件传输我正在使用AFNetworking库（ http://afnetworking.com ）
To do background file transfer under iOS 8 I am using AFNetworking library (http://afnetworking.com)
这篇关于gcdasyncsocket后台文件传输的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
