Question

我正在尝试将我的代码从ASIHTTPRequest更改为AFNetworking。目前我想选择10-15个不同的HTTP URL（文件）并将它们下载到文档文件夹。

使用

非常简单的ASIHTTPRequest

[myQueue setDownloadProgressDelegate:myUIProgressView];

在AFNetworking中，我无法弄清楚如何做到这一点。我有以下代码下载文件，存储它们并在文件成功下载时通知，但我无法为此队列创建总大小的进度条。

for (i=0; i<3; i++) {

    NSString *urlpath = [NSString stringWithFormat:@"http://www.domain.com/file.zip"];
    NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:urlpath]];

    AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *path = [[paths objectAtIndex:0] stringByAppendingPathComponent:[NSString stringWithFormat:@"testFile%i.zip",i]];
    operation.outputStream = [NSOutputStream outputStreamToFileAtPath:path append:NO];

    [operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
        NSLog(@"Successfully downloaded file to %@", path);
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"Error: %@", error);
    }];

    [operation setDownloadProgressBlock:^(NSInteger bytesWritten, NSInteger totalBytesWritten, NSInteger totalBytesExpectedToWrite) {
        NSLog(@"Sent %d of %d bytes, %@", totalBytesWritten, totalBytesExpectedToWrite, path);
    }];

    [myQueue addOperation:operation];  
}

Answer 1

我认为您必须创建自己的UIProgressView，我将其称为progressView。

progressVu = [[UIProgressView alloc] initWithFrame:CGRectMake(x, y, width, height)];
[progressVu setProgressViewStyle: UIProgressViewStyleDefault];

然后只需更新进度条：

[operation setDownloadProgressBlock:^(NSInteger bytesWritten, NSInteger totalBytesWritten, NSInteger totalBytesExpectedToWrite) {

    float percentDone = ((float)((int)totalBytesWritten) / (float)((int)totalBytesExpectedToWrite));

    progressView.progress = percentDone;

    NSLog(@"Sent %d of %d bytes, %@", totalBytesWritten, totalBytesExpectedToWrite, path);
}];

Answer 2

[operation setDownloadProgressBlock:^(NSInteger bytesRead, long long totalBytesRead, long long totalBytesExpectedToRead) {

    float percentDone = ((float)((int)totalBytesRead) / (float)((int)totalBytesExpectedToRead));

    progressView.progress = percentDone;

}];

Answer 3

想象一下，假设每个文件大小为1 MB，就可以通过这种方式下载200多个文件。当您创建这么多请求（默认超时为30秒）时会发生什么？ 30秒后，您将被超时错误轰炸。

只是说' 马丁

AFNetworking - 通过UIProgressView下载多个文件+监控

3 个答案: