Question

我正在获得像这样的响应对象

responseObject = { ＆＃34; img＆＃34;：＆＃34; images / ProfileImage / defaultImg.jpg＆＃34;， }

我必须将此图像存储在app文件夹中。有没有办法做到这一点。

Answer 1

路径不完整

您需要在＆＃34; images / ProfileImage / defaultImg.jpg＆＃34;

之前附加基本网址

然后

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
    NSString *urlToDownload = BaseURL + "images/ProfileImage/defaultImg.jpg";
    NSURL  *url = [NSURL URLWithString:urlToDownload];
    NSData *urlData = [NSData dataWithContentsOfURL:url];
    if (urlData)
    {
        NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
        NSString *documentsDirectory = [paths objectAtIndex:0];

        NSString *filePath = [NSString stringWithFormat:@"%@/%@", documentsDirectory,@"defaultImg.png"];
        //saving is done on main thread
        dispatch_async(dispatch_get_main_queue(), ^{
            [urlData writeToFile:filePath atomically:YES];
            NSLog(@"File Saved !");
        });
    }

});

Answer 2

以下是用于将图像下载并存储到iOS应用程序文件夹

中的本地“文档”目录的代码

在下面的代码urlString中是图片的网址。

dispatch_queue_t downloadThumbNail = dispatch_queue_create("com.download.thumbnail", NULL);
    dispatch_async(downloadThumbNail, ^
    {
        NSData *imageData = [NSData dataWithContentsOfURL:[NSURL URLWithString:urlString]];
        UIImage *imageThumb = [UIImage imageWithData:imageData];
        dispatch_async(dispatch_get_main_queue(),
        ^{
            NSString *str = @“filename.png”;
            NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
            NSString *documentsPath = [paths objectAtIndex:0];
            NSString *filePath = [documentsPath stringByAppendingPathComponent:str];
            NSData *pngData = UIImagePNGRepresentation(imageThumb);
            [pngData writeToFile:filePath atomically:YES];
        });
    });

享受编码。

从服务器获取图像

2 个答案: