ios - 如何在表格 View 单元格上加载不同的图像

Question

我在第一个 View 中有两个 View ，说 A 用于在单击保存按钮时将图像保存在文档目录中，然后第二个 View 说 B。我有两个上传带有表格特定单元格的图像。在下面的代码中，我正在尝试将图像与特定用户的电子邮件 ID 进行比较。电子邮件在两种 View 中都很常见。那么我可以通过他们的电子邮件来区分特定用户吗？在他们的表格 View 单元格上，我们以不同的方式显示他们的图像。但我做不到...这在 Ios 中如何实现？任何人都可以帮我解决这个问题....我在文档目录中保存和加载图像的代码是在这里输入代码

View A

-(void)saveImage: (UIImage*)image
{
    if (image != nil)
    {
        NSArray *paths =  NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
        NSString *documentsDirectory = [paths objectAtIndex:0];
        NSString* path = [documentsDirectory stringByAppendingPathComponent:
                              @"iosImage.png" ];
        NSString *fileName = [path stringByAppendingFormat:email];
        NSLog(@"The result of Concatenate String =%@",fileName);
        NSData* data = UIImagePNGRepresentation(image);
                  [data writeToFile:path atomically:YES];
        NSLog(@"The Path of the directory %@",path);
    }
}

View B

- (UIImage*)loadImage
{
    NSLog(@"Email^^^^^^^^^%@",imgEmail);
    NSError *error;
    NSFileManager *fileMgr = [NSFileManager defaultManager];
    NSArray *paths =        NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString* path = [documentsDirectory stringByAppendingPathComponent:
                          @"iosImage.png" ];
    UIImage* image = [UIImage imageWithContentsOfFile:path];
    NSLog(@"Documents directory: %@",[fileMgr     contentsOfDirectoryAtPath:documentsDirectory error:&error]);
    return image;
}

Answer 1

您可以修改saveImage 和loadImage 函数如下。

-(void)saveImage: (UIImage*)image filePath:(NSString*)fileNameEmail
{
     if (image != nil)
     {
        NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
        NSString *filePath = [[paths objectAtIndex:0] stringByAppendingPathComponent:fileNameEmail];

        NSData* data = UIImagePNGRepresentation(image);
              [data writeToFile:filePath atomically:YES];

     }
}

- (UIImage*)loadImage:(NSString*)fileNameEmail
{
     NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
     NSString *filePath = [[paths objectAtIndex:0] stringByAppendingPathComponent:fileNameEmail];
     UIImage *image = [[UIImage alloc] initWithContentsOfFile:filePath];
     return image;
}

编辑 : 你可以得到如下的特定图像。

-(UITableViewCell *)tableView:(UITableView *)tableView  cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell"];

    cell.youimageview.image = [self loadImage:[[yourArray indexOfObject:indexPath.row] valueForKey:@"youemailkey"]];
    return cell;
}

希望这对你有帮助。