Question

NSString *stringPath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)objectAtIndex:0]stringByAppendingPathComponent:@"SavedImages"];

NSError *error = nil;
if (![[NSFileManager defaultManager] fileExistsAtPath:stringPath])
    [[NSFileManager defaultManager] createDirectoryAtPath:stringPath withIntermediateDirectories:NO attributes:nil error:&error];
NSString *imageName = [NSString stringWithFormat:@"/savedImage1.jpg"];
NSString *fileName = [stringPath stringByAppendingString:imageName];

NSURL *url = [NSURL URLWithString:@"http://example.com/pictures/sample

.JPG“]; ASIHTTPRequest * request = [ASIHTTPRequest requestWithURL：url];

[request setDownloadDestinationPath:[NSString stringWithFormat:@"%@", stringPath]]; //use the path from earlier
[request setDelegate:self];

[request startAsynchronous];
[request setCompletionBlock:^
{
      NSData * dataFromrequest = [request responseData];
     NSLog(@"request  data  = %@",dataFromrequest);
     dataFromrequest writeToFile:fileName atomically:YES];

}];

我正在使用此代码从网址下载图片。但我使用的是另一个网址，而不是“http://example.com/pictures/sample.jpg”，有效的网址。当我尝试这个代码..它没有去完成块。请告诉我问题是什么，我做错了什么。

谢谢

Answer 1

一切看起来都不错，对于完成块我们不想使用委托。请按照代码进行操作。

ASIHTTPRequest * photoRequest = [[ASIHTTPRequest alloc] initWithURL：[NSURL URLWithString：“http://example.com/pictures/sample.jpg”）]];

[photoRequest setDownloadDestinationPath：[NSString stringWithFormat：@“％@ / sample.png”，stringPath]];

[photoRequest setCompletionBlock：^ {

   NSLog(@"Response %d", [photoRequest responseStatusCode]);

}];

[photoRequest startAsynchronous];

希望您理解代码。

使用ASIHttpRequest下载数据

1 个答案: