ios后台更新和下载

概述ios后台更新和下载

下面是内存溢出 jb51.cc 通过网络收集整理的代码片段。

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- (BOol)application:(UIApplication *)application dIDFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    [application setMinimumBackgroundFetchInterval:UIApplicationBackgroundFetchIntervalMinimum];    NSLog(@"Launched in background %d",UIApplicationStateBackground == application.applicationState);    return YES;}// 1.利用Background Fetch- (voID)application:(UIApplication *)application performFetchWithCompletionHandler:(voID (^)(UIBackgroundFetchResult))completionHandler {    NSURLSessionConfiguration *sessionConfiguration = [NSURLSessionConfiguration defaultSessionConfiguration];    NSURLSession *session = [NSURLSession sessionWithConfiguration:sessionConfiguration];    NSURL *url = [[NSURL alloc] initWithString:@"http://127.0.0.1/data.Json"];    NSURLSessionDataTask *task = [session  dataTaskWithURL:url                                         completionHandler:^(NSData *data,NSURLResponse *response,NSError *error) {                                             if (error) {                                                 completionHandler(UIBackgroundFetchResultFailed);                                                 return;                                             }                                             completionHandler(UIBackgroundFetchResultNewData);                                         }];    [task resume];}// 2.利用Remote Notification/* 推送的内容 { "aps" : { "content-available" : 1 },"content-ID" : 42 } */- (voID)application:(UIApplication *)applicationdIDReceiveRemoteNotification:(NSDictionary *)userInfofetchCompletionHandler:(voID (^)(UIBackgroundFetchResult))completionHandler{    NSLog(@"Received remote notification with userInfo %@",userInfo);        NSNumber *contentID = userInfo[@"content-ID"];    Nsstring *downloadURLString = [Nsstring stringWithFormat:@"http://yourserver.com/downloads/%d.mp3",[contentID intValue]];    NSURL* downloadURL = [NSURL URLWithString:downloadURLString];        NSURLRequest *request = [NSURLRequest requestWithURL:downloadURL];    NSURLSessionDownloadTask *task = [[self backgroundURLSession] downloadTaskWithRequest:request];    task.taskDescription = [Nsstring stringWithFormat:@"podcast Episode %d",[contentID intValue]];    [task resume];    completionHandler(UIBackgroundFetchResultNewData);}- (NSURLSession *)backgroundURLSession{    static NSURLSession *session = nil;    static dispatch_once_t oncetoken;    dispatch_once(&oncetoken,^{        Nsstring *IDentifIEr = @"io.objc.backgroundTransferExample";        NSURLSessionConfiguration* sessionConfig = [NSURLSessionConfiguration backgroundSessionConfiguration:IDentifIEr];        session = [NSURLSession sessionWithConfiguration:sessionConfig                                                delegate:self                                           delegateQueue:[NSOperationQueue mainQueue]];    });    return session;}

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总结

以上是内存溢出为你收集整理的ios后台更新和下载全部内容，希望文章能够帮你解决ios后台更新和下载所遇到的程序开发问题。

如果觉得内存溢出网站内容还不错，欢迎将内存溢出网站推荐给程序员好友。