ios - 如何在 Objective c 中将捕获图像添加到 UITableView

Question

我是 iOS 新手，我遇到了关于从图像选择器在 UITableView 中设置图像的问题。

我的代码是这样的

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(NSDictionary *)editingInfo
{
    CGSize newSizeClient=CGSizeMake(200,200); // I am giving resolution 50*50 , you can change your need
    UIGraphicsBeginImageContext(newSizeClient);
    [image drawInRect:CGRectMake(0, 0, newSizeClient.width, newSizeClient.height)];
    UIImage* newImageClient = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    captureimg.image = newImageClient;

    [imageArray replaceObjectAtIndex:index withObject:captureimg.image];

    dispatch_async(dispatch_get_main_queue(), ^{
        [Audittable reloadData];
    });

    NSData *imgData = [[NSData alloc] initWithData:UIImageJPEGRepresentation((newImageClient), 0.5)];
    OCSSignString = [imgData base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength];

    [picker dismissModalViewControllerAnimated:YES];

    imageView = [[UIImageView alloc] initWithFrame:CGRectMake(20, 30,40,40)];
    UIImage *wonImage = captureimg.image;
    imageView.contentMode=UIViewContentModeCenter;
    [imageView setImage:wonImage];

}

在 cellforRowAtIndexPath 中

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
      cell.Photobtn.tag=indexPath.row;
[cell.Photobtn addTarget:self action:@selector(btnphotoClick:) forControlEvents:UIControlEventTouchUpInside];  
  cell.CaptureImage.image = [imageArray objectAtIndex:indexPath.row];
}

我面临的问题是它没有像图像中那样根据行进行设置

我正在根据tableviewcell抓图

-(void)btnphotoClick:(UIButton *)sender
{
     AuditNextTableViewCell *cell = sender.superview.superview;


    imageArray =[[NSMutableArray alloc]init];
    for (int i=0; i<idarray.count; i++) {
        [imageArray addObject:[UIImage new]];
    }

    index=sender.tag;

    if (! [UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {

        UIAlertView *deviceNotFoundAlert = [[UIAlertView alloc] initWithTitle:@"No Device" message:@"Camera is not available"
                                                                     delegate:nil
                                                            cancelButtonTitle:@"Okay"
                                                            otherButtonTitles:nil];
        [deviceNotFoundAlert show];
    }
    else
    {
        UIImagePickerController *cameraPicker = [[UIImagePickerController alloc] init];
        cameraPicker.sourceType = UIImagePickerControllerSourceTypeCamera;
        cameraPicker.delegate =self;
        [self presentViewController:cameraPicker animated:YES completion:nil];
    }
}

我面临的问题是它已经过时了。提前致谢!

Answer 1

问题出在您的按钮操作中，您每次都使用空的 UIImage 对象初始化您的 imageArray。从您的按钮操作中删除此代码。

imageArray = [[NSMutableArray alloc]init];
for (int i=0; i<idarray.count; i++) {
    [imageArray addObject:[UIImage new]];
}

当您第一次加载您的 tableView 时，您只需使用空的 UIImage 对象初始化您的 imageArray 一次。