Question

我的UIPopover中有以下视图控制器：

@protocol StorePopoverDelegate
- (void)storeSelected:(NSString *)store;
@end

@interface StorePopoverViewController : UITableViewController
{
    NSMutableArray* items;
}

@property (nonatomic, assign) id<StorePopoverDelegate> delegate;


@end

当选择一个项目时，我希望我的代表被调用：

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    if (delegate != nil) {
        [delegate storeSelected:[items objectAtIndex:indexPath.row]];
    }
}

实现了处理storeSelected的委托类：

-(IBAction)storesButtonClicked:(id)sender
{
    storesPopoverViewController = [[StorePopoverViewController alloc] initWithStyle:UITableViewStylePlain];
    storePopover.delegate = (id)self;
    storePopover = [[UIPopoverController alloc] initWithContentViewController:storesPopoverViewController]; 
    [storePopover presentPopoverFromBarButtonItem:sender permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
}

#pragma Store Popover Delegate Methods
- (void)storeSelected:(NSString *)store;
{
    NSLog(@"%@ was clicked", store);
    [storePopover dismissPopoverAnimated:YES];
}

在我的- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath中，代表是零。我不知道为什么？我正在分配它。

Answer 1

在storesButtonClicked:方法中，您要设置storePopover的委托（此时甚至没有初始化）。您应该设置storePopoverViewController的委托属性。

storePopoverViewController.delegate = (id)self;

无法实现UIPopoverController委派

1 个答案: