我想做的是:
首先,它与类(控制器)TopPlacesViewController
有一个segue 。SinglePlacePhotosViewController
TableView
我在类中创建了一个委托TopPlacesViewController
,然后使用该prepareforSegue
方法将其设置SinglePlacePhotosViewController
为委托并实现协议方法。
然后,当我单击TopPlacesViewController
(TableView 控制器)中的照片时,它会调用TopPlacesViewController
应该显示该位置的一些照片的方法。
但我一直收到这个错误:
[SinglePlacePhotosViewController setDelegate:]:无法识别的选择器发送到实例 0xc94cc20
我的TopPlacesViewController.h
文件:
@class TopPlacesViewController;
@protocol TopPlacesViewControllerDelegate
- (void)topPlacesViewControllerDelegate:(TopPlacesViewController *)sender
showPhotos:(NSArray *)photo;
@end
@interface TopPlacesViewController : UITableViewController
@property (nonatomic,weak) id <TopPlacesViewControllerDelegate> delegate;
@end
TopPlacesViewController.m
:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
NSDictionary *place = [self.places objectAtIndex:indexPath.row];
self.singlePlacePhotos = [FlickrFetcher photosInPlace:place maxResults:50];
[self.delegate topPlacesViewControllerDelegate:self showPhotos:self.singlePlacePhotos];
[self performSegueWithIdentifier:@"Flickr Photos" sender:self];
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if([segue.identifier isEqualToString:@"Flickr Photos"]) {
[segue.destinationViewController setDelegate:self];
}
}
然后在这个我实现委托:
@interface SinglePlacePhotosViewController () <"TopPlacesViewControllerDelegate">
- (void)topPlacesViewControllerDelegate:(TopPlacesViewController *)sender showPhoto:(NSArray *)photo
{
self.photos = photo;
}