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NSURLRequest *request = [NSURLRequest requestWithURL:url
cachePolicy:nil
timeoutInterval:120];
AFHTTPRequestOperation *downloadRequest = [[AFHTTPRequestOperation alloc] initWithRequest:request];
[downloadRequest setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation,id responSEObject) {
if (operation.response.statusCode != 200) {
NSLog(@"Error code(S): %d",[operation.response statusCode]);
}else{
NSData *data = [[NSData alloc] initWithData:responSEObject];
[data writeToFile:filePath atomically:YES];
NSLog(@"successful download to %@",filePath);
[data release];
}
[self fetchComplete:operation type:type];
} failure:^(AFHTTPRequestOperation *operation,NSError *error) {
NSLog(@"error code: %d",[operation.response statusCode]);
NSLog(@"error discreption: %@",[error localizedDescription]);
[self fetchFailed:operation];
}];
//步骤1：使用下载文件的完整路径创建NSURL
//例如试试这个：NSString * fileUrl = @“https://pbs.twimg.com/profile_images/2331579964/jrqzn4q29vwy4mors75s_400x400.png”;
//使用我们的URL创建NSURLRequest对象
NSURL *URL = [NSURL URLWithString:fileUrl]; NSURLRequest *request = [NSURLRequest requestWithURL:URL];
//第2步：保存下载文件的名称
//例如我们的fileName字符串等于’jrqzn4q29vwy4mors75s_400x400.png’
NSString *fileName = [URL lastPathComponent];
//步骤3：使用我们的请求创建AFHTTPRequestOperation对象
AFHTTPRequestOperation *downloadRequest = [[AFHTTPRequestOperation alloc] initWithRequest:request];
//步骤4：设置服务器应答的处理和请求的错误
[downloadRequest setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation,id responSEObject) { // here we must create NSData object with received data... NSData *data = [[NSData alloc] initWithData:responSEObject]; // ... and save this object as file // Here 'pathToFile' must be path to directory 'Documents' on your device + filename,of course [data writeToFile:pathToFile atomically:YES]; } failure:^(AFHTTPRequestOperation *operation,NSError *error) { NSLog(@"file downloading error : %@",[error localizedDescription]); }];
//第5步：开始异步下载
[downloadRequest start];
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