AFNetworking 2.X
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/** * @author Jakey * * @brief 下载文件 * * @param parameters 附加post参数 * @param requestURL 请求地址 * @param savedPath 保存 在磁盘的位置 * @param success 下载成功回调 * @param failure 下载失败回调 * @param progress 实时下载进度回调 */ - (void)downloadFileWithOption:(NSDictionary *)parameters withInferface:(NSString*)requestURL savedPath:(NSString*)savedPath downloadSuccess:(void (^)(AFHTTPRequestOperation *operation, id responseObject))success downloadFailure:(void (^)(AFHTTPRequestOperation *operation, NSError *error))failure progress:(void (^)(float progress))progress { //沙盒路径 //NSString *savedPath = [NSHomeDirectory() stringByAppendingString:@"/Documents/xxx.zip"]; AFHTTPRequestSerializer *serializer = [AFHTTPRequestSerializer serializer]; NSMutableURLRequest *request =[serializer requestWithMethod:@"POST" URLString:requestURL parameters:parameters error:nil]; //以下是手动创建request方法 AFQueryStringFromParametersWithEncoding有时候会保存 // NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:requestURL]]; // NSMutableURLRequest *request =[[[AFHTTPRequestOperationManager manager]requestSerializer]requestWithMethod:@"POST" URLString:requestURL parameters:paramaterDic error:nil]; // // NSString *charset = (__bridge NSString *)CFStringConvertEncodingToIANACharSetName(CFStringConvertNSStringEncodingToEncoding(NSUTF8StringEncoding)); // // [request setValue:[NSString stringWithFormat:@"application/x-www-form-urlencoded; charset=%@", charset] forHTTPHeaderField:@"Content-Type"]; // [request setHTTPMethod:@"POST"]; // // [request setHTTPBody:[AFQueryStringFromParametersWithEncoding(paramaterDic, NSASCIIStringEncoding) dataUsingEncoding:NSUTF8StringEncoding]]; AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc]initWithRequest:request]; [operation setOutputStream:[NSOutputStream outputStreamToFileAtPath:savedPath append:NO]]; [operation setDownloadProgressBlock:^(NSUInteger bytesRead, long long totalBytesRead, long long totalBytesExpectedToRead) { float p = (float)totalBytesRead / totalBytesExpectedToRead; progress(p); NSLog(@"download：%f", (float)totalBytesRead / totalBytesExpectedToRead); }]; [operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) { success(operation,responseObject); NSLog(@"下载成功"); } failure:^(AFHTTPRequestOperation *operation, NSError *error) { success(operation,error); NSLog(@"下载失败"); }]; [operation start]; } |
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//使用 - (IBAction)downloadTouched:(id)sender { NSString *savedPath = [NSHomeDirectory() stringByAppendingString:@"/Documents/QQ7.6.exe"]; // NSDictionary *paramaterDic= @{@"jsonString":[@{@"userid":@"2332"} JSONString]?:@""}; [self downloadFileWithOption:@{@"userid":@"123123"} withInferface:@"http://dldir1.qq.com/qqfile/qq/QQ7.6/15742/QQ7.6.exe" savedPath:savedPath downloadSuccess:^(AFHTTPRequestOperation *operation, id responseObject) { } downloadFailure:^(AFHTTPRequestOperation *operation, NSError *error) { } progress:^(float progress) { }]; } |
AFNetworking 3.X
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- (void)downloadFileWithURL:(NSString*)requestURLString parameters:(NSDictionary *)parameters savedPath:(NSString*)savedPath downloadSuccess:(void (^)(NSURLResponse *response, NSURL *filePath))success downloadFailure:(void (^)(NSError *error))failure downloadProgress:(void (^)(NSProgress *downloadProgress))progress { AFHTTPRequestSerializer *serializer = [AFHTTPRequestSerializer serializer]; NSMutableURLRequest *request =[serializer requestWithMethod:@"POST" URLString:requestURLString parameters:parameters error:nil]; NSURLSessionDownloadTask *task = [[AFHTTPSessionManager manager] downloadTaskWithRequest:request progress:^(NSProgress * _Nonnull downloadProgress) { progress(downloadProgress); } destination:^NSURL * _Nonnull(NSURL * _Nonnull targetPath, NSURLResponse * _Nonnull response) { return [NSURL fileURLWithPath:savedPath]; } completionHandler:^(NSURLResponse * _Nonnull response, NSURL * _Nullable filePath, NSError * _Nullable error) { if(error){ failure(error); }else{ success(response,filePath); } }]; [task resume]; } |
调用
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- (IBAction)downloadTouched:(id)sender { NSString *savedPath = [NSHomeDirectory() stringByAppendingString:@"/Documents/QQ7.6.exe"]; [self downloadFileWithURL:@"http://dldir1.qq.com/qqfile/qq/QQ7.6/15742/QQ7.6.exe" parameters:@{@"userid":@"123123"} savedPath:savedPath downloadSuccess:^(NSURLResponse *response, NSURL *filePath) { } downloadFailure:^(NSError *error) { } downloadProgress:^(NSProgress *downloadProgress) { NSLog(@"总大小：%lld,当前大小:%lld",downloadProgress.totalUnitCount,downloadProgress.completedUnitCount); }]; } |
问题
有些人的AFNetworking 3 progress参数是一个指针，并不是一个block，如下：
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- (void)addDelegateForDownloadTask:(NSURLSessionDownloadTask *)downloadTask progress:(NSProgress * __autoreleasing *)progress destination:(NSURL * (^)(NSURL *targetPath, NSURLResponse *response))destination completionHandler:(void (^)(NSURLResponse *response, NSURL *filePath, NSError *error))completionHandler |
可以自行更新到最新版本的AFN或者使用KVO监听progress,progress是一个NSProgress实例
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NSProgress *progress; [manager downloadTaskWithRequest:request progress:&progress destination:^NSURL * _Nonnull(NSURL * _Nonnull targetPath, NSURLResponse * _Nonnull response) {... |
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[progress addObserver:self forKeyPath:@"fractionCompleted" options:NSKeyValueObservingOptionNew context:NULL]; |
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- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSString *,id> *)change context:(void *)context{ if ([keyPath isEqualToString:@"fractionCompleted"] && [object isKindOfClass:[NSProgress class]]) { NSProgress *progress = (NSProgress *)object; NSLog(@"总大小：%lld,当前大小:%lld",progress.totalUnitCount,progress.completedUnitCount); } } |
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