Question

我正在尝试下载我的图像并存储到目录中。在用空格更新服务器端的图像名称之前，每件事都运行正常。我用以下代码处理空格。

NSString *newString = [getImageUrl stringByReplacingOccurrencesOfString:@" " 
                                                             withString:@"%20"];

之后我得到了最终的URL字符串，如下所示

http://www.retail-king.com/image/data/men%20jeans/pd%201/5.jpg

当我在浏览器中打开此网址时，图像显示但我无法在应用中看到并下载带有此网址的图片。

我正在调用以下方法来下载图像。

-(void)downloadImageWithPath:(NSString *)_path andURL:(NSString *)_url

{

ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:[NSURL URLWithString:_url]];

NSLog(@"pic file = %@",_path);
NSLog(@"ASI http pic url:%@",[[request url] description]);


//    [request setDownloadProgressDelegate:self];
[request setShowAccurateProgress:YES];
request.shouldContinueWhenAppEntersBackground=YES;

[request setDownloadDestinationPath:_path];
[request setTimeOutSeconds:30];
//    [request setDelegate:self];
[request setStartedBlock:^{
    NSLog(@"request started pic");
}];
[request setCompletionBlock:^{
    // Use when fetching text data
    NSLog(@"request completed pic");
    currentPicsCount++;
    if (currentPicsCount == picsCount && totalPicsDownload ) {
        NSLog(@"All pics have downloaded");
        totalPicsDownload = false;
        [[SingltonClass getLoadingClassReference] dataSynced];

    }
}];
[request setFailedBlock:^{
    NSLog(@"request failed pic");
    picsCount--;
}];
[request startAsynchronous];

} 调用setFailedBlock。其中显示pic无法下载。

Answer 1

你的问题很模糊。我快速对URL进行了测试，并能够看到下载的图像。这可能不是一个理想的解决方案，但您可以了解正在发生的事情。我使用UIWebView来显示图像，而棘手的部分可能是设置CGRectMake的边界。你是如何下载和显示图像的？

如果有帮助，这是我的代码。

- (void)viewDidLoad
{
    [super viewDidLoad];

    // Added space between keyword men and jeans
    NSString *url = @"http://retail-king.com/image/data/men jeans/pd%201/5.jpg";
    url = [url stringByReplacingOccurrencesOfString:@" " withString:@"%20"];

    // Check for URL
    NSLog(@"Final Url = %@",url);

    // Displaying it on webview
    UIWebView *webView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];

    NSURL *targetURL = [NSURL URLWithString:url];
    NSURLRequest *request = [NSURLRequest requestWithURL:targetURL];
    [webView loadRequest:request];

    [self.view addSubview:webView];

    // Program to check if the image is downloaded in directory

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *localFilePath = [paths objectAtIndex:0];

    NSData *thedata = [NSData dataWithContentsOfURL:[NSURL URLWithString:url]];
    [thedata writeToFile:localFilePath atomically:YES];

}

图片已成功下载 -

/Users/raurora/Library/Application Support/iPhone Simulator/7.1/Applications/554A5C94-1D29-42F0-886D-751CD3DFB155/Library/Caches/com.stackoverflow.doubt/fsCachedData/

图片下载失败，网址为iOS

1 个答案: