用于在取消时删除UITableView单元格的UIActionSheet保持显示按下删除按钮

Question

在表视图中删除行时,我想显示一个在某些情况下要求确认的操作表.当操作表单以"是"(破坏性操作)回答时,我删除了表格行,一切都很好.但是当按下取消时,我仍然看到处于按下状态的删除按钮.

我在tableView:commitEditingStyle删除时所做的是:

BlockBasedActionSheet *askSheet =
    [[BlockBasedActionSheet alloc] 
          initWithTitle:@"Delete entry?"
      cancelButtonTitle:@"No"
 destructiveButtonTitle:@"Yes, delete child also records"
           cancelAction:^{
               UITableViewCell *cell = [self tableView:tableView cellForRowAtIndexPath:indexPath];
               if (cell.showingDeleteConfirmation) {
                   cell.editing = NO;
                   cell.editingAccessoryView = nil;
                   cell.editing = YES;
               }
           }
  destructiveAction:deleteBlock];
[askSheet showInView:self.view];
[askSheet release];

同样奇怪的是,单元格的属性showingDeleteConfirmation是NO,但删除按钮仍然可见.

我正在使用自制的基于块的操作表实现.也许存在错误,尽管我似乎在取消块中得到了正确的单元格.

那么,如何将"删除"按钮状态重置为"未按下"并将其删除,并将圆形删除按钮恢复为水平,就像我点击屏幕上的某个位置时一样？

助手班BlockBasedActionSheet.h:

@interface BlockBasedActionSheet : UIActionSheet<UIActionSheetDelegate> {
}

@property (copy) void (^cancelBlock)();
@property (copy) void (^destructiveBlock)();

- (id)initWithTitle:(NSString *)title cancelButtonTitle:(NSString *)cancelButtonTitle destructiveButtonTitle:(NSString *)destructiveButtonTitle cancelAction:(void (^)())cancelBlock destructiveAction:(void (^)())destructiveBlock;

@end

实施文件BlockBasedActionSheet.m:

#import "BlockBasedActionSheet.h"

@implementation BlockBasedActionSheet
@synthesize cancelBlock = _cancelBlock, destructiveBlock = _destructiveBlock;

- (id)initWithTitle:(NSString *)title cancelButtonTitle:(NSString *)cancelButtonTitle destructiveButtonTitle:(NSString *)destructiveButtonTitle cancelAction:(void (^)())cancelBlock destructiveAction:(void (^)())destructiveBlock
{
    self = [super initWithTitle:title delegate:self cancelButtonTitle:cancelButtonTitle destructiveButtonTitle:destructiveButtonTitle otherButtonTitles: nil];
    if (self) {
        _cancelBlock = Block_copy(cancelBlock);
        _destructiveBlock = Block_copy(destructiveBlock);
    }
    return self;
}

-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
    NSAssert(actionSheet == self, @"Wrong Action Sheet passed");
    if (buttonIndex == [self cancelButtonIndex]) {
        if (self.cancelBlock) {
            self.cancelBlock();
        }
    } else {
        if (self.destructiveBlock) {
            self.destructiveBlock();
        }
    }
}

@end

Answer 1

因此，它的工作原理是用此替换第一个代码片段

BlockBasedActionSheet *askSheet =
    [[BlockBasedActionSheet alloc] 
          initWithTitle:@"Delete entry?"
      cancelButtonTitle:@"No"
 destructiveButtonTitle:@"Yes, delete also child records"
           cancelAction:^{
           // this resets the delete button
           [tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPath]
                            withRowAnimation:UITableViewRowAnimationFade];
           }
  destructiveAction:deleteBlock];
[askSheet showInView:self.view];
[askSheet release];

重新加载行就可以了。