Question

我想从存储在iPhone中的该图像的已保存文件路径中加载图像。我正在获取路径，但它仍然说文件不存在。这是我的代码：

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
                                                             NSUserDomainMask, YES);
        NSString *documentsDirectory = [paths objectAtIndex:0];
        NSString *imagePath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@",self.imageName]];
        BOOL fileExists=[[NSFileManager defaultManager] fileExistsAtPath:imagePath];
        NSLog(@"%@",imagePath);
        UIImage *fetchImage = [UIImage imageWithContentsOfFile:imagePath];

即使我收到此路径，fileExists也会返回 NO ：

/var/mobile/Applications/2ED5C185-8528-48D3-BE0B-28582DC3D294/Documents/IMG_0028.JPG

Answer 1

我也遇到了这个问题。希望这会让人在路上遇到麻烦。

您不能依赖文档目录来保持从一个构建到下一个构建的一致性。当您重新部署应用程序时，此路径可能会更改：

/var/mobile/Applications/2ED5C185-8528-48D3-BE0B-28582DC3D294/Documents/

我的问题是我将文档路径存储在JSON文件中并尝试在后续版本中检索它。这件作品在每个版本中都会发生变化：

2ED5C185-8528-48D3-BE0B-28582DC3D294

仅存储带扩展名的文件名并动态提取文档路径。然后，您可以继续在文件名上添加路径前缀。

Answer 2

试试这个对我来说很好用

NSString* documentsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
      NSString *imageName = [[NSString alloc]initWithFormat:@"%@",self.imageName ];
      NSString* foofile = [documentsPath stringByAppendingPathComponent:imageName];
      BOOL fileExists = [[NSFileManager defaultManager] fileExistsAtPath:foofile];
      if (fileExists) {
        NSLog(@"alreday Exists");
       }

//用于在图像视图上显示图像

NSString *docDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *pngFilePath = [NSString stringWithFormat:@"%@/%@", docDir,self.imageName];
UIImage *img = [UIImage imageWithContentsOfFile:pngFilePath];

Answer 3

试试这个：

NSString *strNew=[dci valueForKey:@"uThumbPath"];
    NSString *strCompare=[NSString stringWithFormat:@"%@.jpg",[self MD5String:strNew]];
    NSString* documentsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
    NSLog(@"%@",documentsPath);
    NSString *strFileName=[NSString stringWithFormat:@"%@/%@",documentsPath,strCompare];

    if([[NSFileManager defaultManager] fileExistsAtPath:strFileName])
    {
        NSLog(@"Downloaded From Localpath");
        NSString *inputPath= strFileName;
        NSString *extension=[inputPath pathExtension];
        NSString *file=[[inputPath lastPathComponent]stringByDeletingPathExtension];
        NSString *dir=[inputPath stringByDeletingLastPathComponent];
        NSString *imagePATH=[NSBundle pathForResource:file ofType:extension inDirectory:dir];
       UIImage* theImage=[UIImage imageWithContentsOfFile:imagePATH];
        cell.imgThumb.image=theImage;

    }
    else{
        NSLog(@"Downloaded From Server");
        NSURL *URL = [NSURL URLWithString: [dci valueForKey:@"uThumbPath"]];
        NSURLRequest* request = [NSURLRequest requestWithURL:URL];
        NSLog(@"%@",strNew);
        [NSURLConnection sendAsynchronousRequest:request
                                           queue:[NSOperationQueue mainQueue]
                               completionHandler:^(NSURLResponse * response,
                                                   NSData * data1,
                                                   NSError * error) {

                                   if (!error){

                                       [self saveLocally:data1 name:strNew];
                                       cell.imgThumb.image = [UIImage imageWithData:data1];

                                   }

                               }];

    }

并使用此

- (NSString *)MD5String:(NSString *)string{
    const char *cstr = [string UTF8String];
    unsigned char result[16];
    CC_MD5(cstr, strlen(cstr), result);

    return [NSString stringWithFormat:
            @"%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X",
            result[0], result[1], result[2], result[3],
            result[4], result[5], result[6], result[7],
            result[8], result[9], result[10], result[11],
            result[12], result[13], result[14], result[15]
            ];  
}

Answer 4

UIImage *image =[UIImage imageWithData:[NSData dataWithContentsOfFile:self.aStrImagePath]];

Answer 5

尝试使用以下代码：

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,
                                                         NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *imagePath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.JPG",self.imageName]];
    BOOL fileExists=[[NSFileManager defaultManager] fileExistsAtPath:imagePath];
    NSLog(@"%@",imagePath);
    UIImage *fetchImage = [UIImage imageWithContentsOfFile:imagePath];

Answer 6

我发生这件事恰好发生在我身上。将XCode添加到我的项目后，XCode没有正确更新我的文件。尝试做一个干净的（产品 - ＆gt;清洁），看看是否能解决问题。

图像未从iOS中的文件路径加载

6 个答案: