NSURLSesstion GET方法 block回调方法NSString * urlStr = @"http://192.168.1.247:8100/stream?cname=cha_26&seq=0&token=xxx"; NSURLSession * session = [NSURLSession sharedSession]; NSURLSessionTask * sessionTask = [session dataTaskWithURL:urlStr completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) { NSLog(@""); }]; [sessionTask resume];
NSURLSesstion POST方法 block回调方法
NSURL * url = [NSURL URLWithString:@"http://www.daka.com/login"]; NSMutableURLRequest * request = [NSMutableURLRequest requestWithURL:url]; request.HTTPMethod = @"POST"; request.HTTPBody = [@"username=daka&pwd=123" dataUsingEncoding:NSUTF8StringEncoding]; NSURLSession * session = [NSURLSession sharedSession]; NSURLSessionTask * task = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) { NSLog(@""); }]; [task resume];
NSURLSesstion 代理方法
NSURLSessionDataDelegate代理方法
NSURLSession * session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration] delegate:self delegateQueue:[[NSOperationQueue alloc] init]]; NSURLSessionDataTask * task = [session dataTaskWithRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://www.daka.com/login?userName=daka&pwd=123"]]]; [task resume];
// 1.接收到服务器的响应 - (void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveResponse:(NSURLResponse *)response completionHandler:(void (^)(NSURLSessionResponseDisposition))completionHandler { // 允许处理服务器的响应,才会继续接收服务器返回的数据 completionHandler(NSURLSessionResponseAllow); } // 2.接收到服务器的数据(可能调用多次) - (void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveData:(NSData *)data { // 处理每次接收的数据 } // 3.请求成功或者失败(如果失败,error有值) - (void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didCompleteWithError:(NSError *)error { // 请求完成,成功或者失败的处理 }
AFHttpSessionManager GET 请求
AFHTTPSessionManager * session = [AFHTTPSessionManager manager]; session.requestSerializer.timeoutInterval = 5.0f; [session GET:urlStr parameters:nil progress:^(NSProgress * _Nonnull downloadProgress) { NSLog(@"downloadProgress"); } success:^(NSURLSessionDataTask * _Nonnull task, id _Nullable responseObject) { NSLog(@"成功"); } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) { NSLog(@"失败"); NSLog(@"error:%@",error); switch (error.code) { case AFNetworkErrorType_NoNetwork : NSLog(@"网络链接失败,请检查网络。"); break; case AFNetworkErrorType_TimedOut : NSLog(@"访问服务器超时,请检查网络。"); break; case AFNetworkErrorType_3840Failed : NSLog(@"服务器报错了,请稍后再访问。"); break; default: break; } }];
AFHttpSessionManager POST 请求
[session POST:urlStr parameters:nil progress:^(NSProgress * _Nonnull uploadProgress) { NSLog(@"downloadProgress"); } success:^(NSURLSessionDataTask * _Nonnull task, id _Nullable responseObject) { NSLog(@"成功"); } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) { NSLog(@"失败"); NSLog(@"error:%@",error); }];
NSURLSessionDownloadTask
NSURLSession *session = [NSURLSession sharedSession]; NSURL *url = [NSURL URLWithString:@"http://www.daka.com/resources/image/icon.png"] ; NSURLSessionDownloadTask *task = [session downloadTaskWithURL:url completionHandler:^(NSURL *location, NSURLResponse *response, NSError *error) { // location是沙盒中tmp文件夹下的一个临时url,文件下载后会存到这个位置,由于tmp中的文件随时可能被删除,所以我们需要自己需要把下载的文件挪到需要的地方 NSString *path = [[NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:response.suggestedFilename]; // 剪切文件 [[NSFileManager defaultManager] moveItemAtURL:location toURL:[NSURL fileURLWithPath:path] error:nil]; }]; // 启动任务 [task resume];
NSURLSessionDownloadDelegate代理方法
// 每次写入调用(会调用多次) - (void)URLSession:(NSURLSession *)session downloadTask:(NSURLSessionDownloadTask *)downloadTask didWriteData:(int64_t)bytesWritten totalBytesWritten:(int64_t)totalBytesWritten totalBytesExpectedToWrite:(int64_t)totalBytesExpectedToWrite { // 可在这里通过已写入的长度和总长度算出下载进度 CGFloat progress = 1.0 * totalBytesWritten / totalBytesExpectedToWrite; NSLog(@"%f",progress); } // 下载完成调用 - (void)URLSession:(NSURLSession *)session downloadTask:(NSURLSessionDownloadTask *)downloadTask didFinishDownloadingToURL:(NSURL *)location { // location还是一个临时路径,需要自己挪到需要的路径(caches下面) NSString *filePath = [[NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:downloadTask.response.suggestedFilename]; [[NSFileManager defaultManager] moveItemAtURL:location toURL:[NSURL fileURLWithPath:filePath] error:nil]; } // 任务完成调用 - (void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didCompleteWithError:(NSError *)error { }
NSURLSessionUploadTask
NSURLSessionUploadTask *task = [[NSURLSession sharedSession] uploadTaskWithRequest:request fromFile:fileName completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) { }];
[self.session uploadTaskWithRequest:request fromData:body completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) { NSLog(@"-------%@", [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil]); }];
断点下载
NSURLSessionDownloadTask提供了与断点下载相关的几个方法:
// 使用这种方式取消下载可以得到将来用来恢复的数据,保存起来 [self.task cancelByProducingResumeData:^(NSData *resumeData) { self.resumeData = resumeData; }]; // 由于下载失败导致的下载中断会进入此协议方法,也可以得到用来恢复的数据 - (void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didCompleteWithError:(NSError *)error { // 保存恢复数据 self.resumeData = error.userInfo[NSURLSessionDownloadTaskResumeData]; } // 恢复下载时接过保存的恢复数据 self.task = [self.session downloadTaskWithResumeData:self.resumeData]; // 启动任务 [self.task resume];
- (void)suspend;//让当前的任务暂停 - (void)resume;//可以启动任务,还可以唤醒suspend状态的任务 - (void)cancel;//取消当前的任务,你也可以向处于suspend状态的任务发送cancel消息,任务如果被取消便不能再恢复到之前的状态.
NSURLSessionConfiguration
NSURLSessionConfiguration *config = [NSURLSessionConfiguration defaultSessionConfiguration]; // 超时时间 config.timeoutIntervalForRequest = 10; // 是否允许使用蜂窝网络(后台传输不适用) config.allowsCellularAccess = YES; // 还有很多可以设置的属性
有没有发现我们使用的Configuration都是默认配置:[NSURLSessionConfiguration defaultSessionConfiguration]
,其实它的配置有三种类型:
+ (NSURLSessionConfiguration *)defaultSessionConfiguration; + (NSURLSessionConfiguration *)ephemeralSessionConfiguration; + (NSURLSessionConfiguration *)backgroundSessionConfigurationWithIdentifier:(NSString *)identifier
表示了NSURLSession几种不同的工作模式.
默认的配置会将缓存存储在磁盘上,第二种瞬时会话模式不会创建持久性存储的缓存,第三种后台会话模式允许程序在后台进行上传下载工作.
除了支持任务的暂停和断点续传,我觉得NSURLSession之于NSURLConnection的最伟大的进步就是支持后台上传下载任务,这又是一个可以深入讨论的话题.但在这方面我还没有进行深入的研究,待后续了解之后另行开贴.
NSURLConnection 代理方法
NSString * urlStrEcode = [urlStr stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet characterSetWithCharactersInString:urlStr]]; NSURL * url = [NSURL URLWithString:urlStr]; NSMutableURLRequest * request = [NSMutableURLRequest requestWithURL:url]; [request setTimeoutInterval:10]; NSURLConnection * conn = [NSURLConnection connectionWithRequest:request delegate:self]; [conn start];
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response { NSLog(@"response:%@",response); } - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data { NSLog(@"data:%@",data); } - (void)connectionDidFinishLoading:(NSURLConnection *)connection { NSLog(@"connection:%@",connection); } -(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error { NSLog(@"error:%@",error); }
NSURLConnection block回调方法
NSString * urlStr = @"http://192.168.1.247:8100/stream?cname=cha_26&seq=0&token=xxx"; NSString * urlStrEcode = [urlStr stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet characterSetWithCharactersInString:urlStr]]; NSURL * url = [NSURL URLWithString:urlStr]; NSMutableURLRequest * request = [NSMutableURLRequest requestWithURL:url]; [request setTimeoutInterval:10]; [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse * _Nullable response, NSData * _Nullable data, NSError * _Nullable connectionError) { }];
时间: 2024-10-04 17:30:58