husthank / backgrounddownloaddemo Goto Github PK
View Code? Open in Web Editor NEW一个简单的使用NSURLSession的下载Demo,包括后台下载和断点下载
一个简单的使用NSURLSession的下载Demo,包括后台下载和断点下载
我在iOS7的设备上运行 发现崩溃在这里 backgroundSessionConfigurationWithIdentifier
查看原因是这个不支持 ios
+ (NSURLSessionConfiguration *)backgroundSessionConfigurationWithIdentifier:(NSString *)identifier NS_AVAILABLE(10_10, 8_0);
那么在iOS7上应该用什么??
我测试的时候发现了些问题,表示很不解:
1、APP在下载过程中突然崩溃了,如何去保存completionHandler()?
2、在- (void)application:(UIApplication *)application handleEventsForBackgroundURLSession:(NSString *)identifier completionHandler:(void (^)(void))completionHandler 中,好像并不需要创建参照? 我发现没创建也是OK的,不知道和创建了有什么区别
3、如果我创建了多个NSURLSession,到后台后是不是要保存多份completionHandler()?
4、我重新进入APP的时候,创建NSURLSession就自动给我继续下载了,导致我在逻辑处理出了问题,怎么让它不自动下载?
completionHandlerDictionary 并未初始化,运行时会告警 (实际上那个从回调里面获取并保存的completion block没有被执行,因为dic是空的)。在didfinishlaunch里面对其进行初始化即可。
11.3版本 downloadTaskWithCorrectResumeData 方法崩溃
后台会话能通过identifier,为它的downloadTask找到临时文件,但是默认配置的会话只会创建新的临时文件,请问退出app后再打开app默认配置的会话如何定位上次的临时文件
真机测试 没有反应 ,在前台也不会下载,进入后台也没反应。iOS10.3.2
“添加到后台会话的任务在外部进程运行,即使应用程序被挂起,崩溃,或者被杀死,它依然会运行。” 应用手动kill后还可以下载吗? 实际操作好像不可以吧? 那这句话如何理解呢?
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