Question

在我的应用程序中，我使用的是自定义表格。每个细胞都有一个uibutton和uiimage。当触摸按下按钮时，我想调用uiimagepickercontroller方法从iphone库中选择一张图片并将其显示在图像视图中。我已经写了但收到警告......'customCell'可能无法响应presentmodalviewcontroller动画...这里customCell是我的主类myApp的子类，也是自定义单元格的nib的名称。谁知道这个问题???? 谢谢......

修改

- (IBAction)selectExistingPicture1 { 
    if ([UIImagePickerController isSourceTypeAvailable: UIImagePickerControllerSourceTypePhotoLibrary]) {
        UIImagePickerController *picker = [[UIImagePickerController alloc] init];
        picker.delegate = self; 
        picker.allowsImageEditing = YES;
        picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
        [self presentModalViewController:picker animated:YES];
        [picker release];
    } 
    else { 
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error accessing photo library" message:@"Device does not support a photo library" delegate:nil cancelButtonTitle:@"Drat!" otherButtonTitles:nil]; 
        [alert show]; 
        [alert release]; 
    } 
}

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(NSDictionary *)editingInfo {    
    CGSize newSize = CGSizeMake(80, 80);
    UIGraphicsBeginImageContext( newSize );
    [image drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];
    UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    imageView.image = newImage;

    [picker dismissModalViewControllerAnimated:YES]; //warning shown here   
}

这是自定义单元格类..而viewController类有......

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

     if (cell == nil) {
         NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"CustomCell" owner:nil options:nil];
         for (id currentObject in nib){
             if ([currentObject isKindOfClass:[CustomCell class]]){
                 cell = (CustomCell *)currentObject; break;
             }
         }
     }

     NSUInteger s= indexPath.section;
     //[cell setText:[NSString stringWithFormat:@"I am cell %d", indexPath.row]];

     NSUInteger r = indexPath.row;
      cell.imageView.image = nil;
     for (s;s==0;s++)
     for(r;r==0;r++)
     {       
          UIImage *img=imageView.image;
         cell.imageView.image = img;
         }
     return cell;
 }

Answer 1

UITableViewCell没有回复-presentModalViewController:animated:。

您可以为CustomCell指定一个指向视图控制器的指针，然后在视图控制器上调用-presentModelViewController:animated:。

将实例变量添加到自定义单元格类：

@interface CustomCell : UITableViewCell {
    UIViewController *viewController;
}
@property (nonatomic, assign) UIViewController *viewController;
@end

在-tableView:cellForRowAtIndexPath:中，创建新的CustomCell后，设置属性：

if (cell == nil) {
    NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"CustomCell" owner:nil options:nil];
    for (id currentObject in nib){
        if ([currentObject isKindOfClass:[CustomCell class]]){
            cell = (CustomCell *)currentObject;
            cell.viewController = self; // <-- add this
            break;
        }
    }
}

然后，在CustomCell类中，替换

[self presentModalViewController:picker animated:YES];

与

[self.viewController presentModalViewController:picker animated:YES];

Answer 2

这不会回答您的问题，但如果您必须在单元格中有UIButton，那么您可能会错误地设置您的UI设计。尝试想办法让整个单元格执行操作，如果不是，请使用公开小工具或其他东西。

UItableViewCell中的uibutton问题

2 个答案: