分类导航

HTML5 发布时间：2022-04-27 发布网站：大佬教程 code.js-code.com

大佬教程收集整理的这篇文章主要介绍了ios – AFNetworking 2.0下载完成后的多个图像，大佬教程大佬觉得挺不错的，现在分享给大家，也给大家做个参考。

我正在试图找出一种使用AFNewtorking 2.0下载多个图像的@L_197_0@.我在这里看过很多帖子,但找不到我要找的答案,希望你们能帮助我.

问题是我想知道所有下载完成后以及所有下载的图像.
所以我有一个带有图像URL蚂蚁的数组试图做这样的事情.

for(NSString *photoUrlString in self.photos){

        NSURL *url = [NSURL URLWithString:photoUrlString];
        AFhttprequestOperation *requestOperation = [[AFhttprequestOperation alloc] initWithrequest:[NSURLrequest requestWithURL:url]];
        requestOperation.responseserializer = [AFImageResponseserializer serializer];
        [requestOperation setCompletionBlockWithsuccess:^(AFhttprequestOperation *operation,id responSEObject) {

        } failure:^(AFhttprequestOperation *operation,NSError *error) {
            NSLog(@"Image error: %@",error);
        }];
        [requestOperation start];
    }

我已经找到了一些答案,将这些请求放入队列并将最大并发操作设置为1.但不知道它是如何工作的.

任何帮助表示赞赏,提前谢谢！

解决方法

for(Photo *photo in array){

    //form the path where you want to save your downloaded image to
    NSString *constPath = [photo imageFullPath];

    //url of your photo
    NSURL *url = [NSURL URLWithString:photo.serverPath];

    AFhttprequestOperation *op = [[AFhttprequestOperation alloc] initWithrequest:[NSURLrequest requestWithURL:url]];
    op.responseserializer = [AFImageResponseserializer serializer];

    op.outputStream = [NSOutputStream outputStreamToFileAtPath:constPath append:NO];
    op.queuePriority = NSOperationQueuePriorityLow;
    [op setDownloadProgressBlock:^(NSUInteger bytesRead,long long @R_768_10586@lBytesRead,long long @R_768_10586@lBytesExpectedToRead){

    }];

    op.completionBlock = ^{

        //do whatever you want with the downloaded photo,it is stored in the path you create in constPath
    };
    [requestArray addObject:op];
}

NSArray *batches = [AFURLConnectionOperation batchOfrequestOperations:requestArray progressBlock:^(NSUInteger numberOfFinishedoperations,NSUInteger @R_768_10586@lnumberOfOperations) {
} completionBlock:^(NSArray *operations) {

    //after all operations are completed this block is called
    if (successBlock)
        successBlock();
}];

[[NSOperationQueue mainQueue] addoperations:batches waitUntilFinished:NO];