AFnetworking下载多个文件

时间:2011-12-07 00:58:49

标签: objective-c ios cocoa-touch afnetworking

我正在使用此代码循环遍历数组以下载多个文件并写入磁盘。

-(void)download
{
//set url paths
for (NSString *filename in syncArray)
{
    NSString *urlpath = [NSString stringWithFormat:@"http://foo.bar/photos/%@", filename];
    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:filename];
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 start];

但问题是它在每个文件完成后调用成功块(它应该),但我只需要最后一次回调来重新加载一些数据并结束进度HUD。

任何正确方向的指针都会很棒。

2 个答案:

答案 0 :(得分:5)

也许有一天这会对某人有所帮助,但我能够使用可能存在重大问题的解决方法,但对我的简单使用没有问题。

我刚刚处理了同步数组中的每一行,然后运行了我需要的代码。

 [operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
    NSLog(@"Successfully downloaded file to %@", path);
    [SVProgressHUD showWithStatus:@"Updating Photos"];
    [syncArray removeObject:filename];
    if (!syncArray || !syncArray.count) 
    {
    NSLog(@"array empty");
        [[NSNotificationCenter defaultCenter] postNotificationName:@"TestNotification" object:self];
        [SVProgressHUD dismissWithSuccess:@"Photos Updated"];
    }

答案 1 :(得分:5)

您可以使用AFHTTPClient到enqueueBatchOperations,这有一个completionBlock,在所有操作完成后调用。应该是你正在寻找的。