所以这就是发生了什么(除了我是菜鸟之外)。
我有两个视图控制器,AddAPlaceViewController和showCategoriesViewController。
我在AddAPlaceVC中有一个表格单元格,你可以点击它和showCategoriesVC(这是一个tableviewcontroller)打开(模态)并给你一个十个选项列表。您点按其中一个或点按取消按钮。
我花了好几天了解并找出协议和代表。我想我已经把它们设置正确,但无法弄清楚它们为什么不工作或被调用。我已经尝试过各种各样的改变,但到目前为止还没有运气。
你们是我唯一的希望! :)
以下是代码的重要部分:
AddAPlaceViewController.h
AddAPlaceViewController.h
#import <UIKit/UIKit.h>
#import "showCategoriesViewController.h"
@interface AddAPlaceViewController : UIViewController <UITextViewDelegate, UITextFieldDelegate, UINavigationControllerDelegate, UIImagePickerControllerDelegate, UIActionSheetDelegate, UITableViewDataSource, UITableViewDelegate, ShowCategoriesViewControllerDelegate>
AddAPlaceViewController.m
AddAPlaceViewController.m
#import "AddAPlaceViewController.h"
#import "FSQVenue.h"
#import "Categories.h"
//#import "showCategoriesViewController.h"
#import <QuartzCore/QuartzCore.h>
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
// Un-highlight the selected cell
[categoryTable deselectRowAtIndexPath:indexPath animated:YES];
showCategoriesViewController *SCVC = [[showCategoriesViewController alloc] init];
SCVC = [self.storyboard instantiateViewControllerWithIdentifier:@"showCategories"];
SCVC.categoryDelegate = self;
[self.navigationController presentModalViewController:SCVC animated:YES];
}
#pragma mark showCategoriesViewControllerDelegate
-(void)didSelectOptions:(NSInteger )selectedCategory
{
NSInteger category = selectedCategory;
NSLog(@"Add Places %d", category);
[self dismissModalViewControllerAnimated:YES];
}
-(void)didCancelOptions
{
NSLog(@"Add Places -- Dismiss Button Pressed");
[self dismissModalViewControllerAnimated:YES];
}
showCategoriesViewController.h
showCategoriesViewController.h
#import <UIKit/UIKit.h>
@protocol ShowCategoriesViewControllerDelegate;
@interface showCategoriesViewController : UITableViewController
{
id<ShowCategoriesViewControllerDelegate>categoryDelegate;
}
@property (nonatomic, weak) id<ShowCategoriesViewControllerDelegate> categoryDelegate;
- (IBAction)cancelButton:(id)sender;
@end
@protocol ShowCategoriesViewControllerDelegate <NSObject>
- (void)didSelectOptions:(NSInteger )selectedCategory;
- (void)didCancelOptions;
@end
showCategoriesViewController.m
showCategoriesViewController.m
#import "showCategoriesViewController.h"
#import "Categories.h"
@interface showCategoriesViewController ()
@property (strong, nonatomic) NSArray *categoryArray;
@end
@implementation showCategoriesViewController
@synthesize categoryDelegate = _categoryDelegate;
@synthesize categoryArray;
…
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
[_categoryDelegate didSelectOptions:indexPath.row];
NSLog(@"Selected IndeXPath %@", cell);
NSLog(@"Selected IndeXPath GOING TO DELEGATE %d", indexPath.row);
}
- (IBAction)cancelButton:(id)sender {
[_categoryDelegate didCancelOptions];
NSLog(@"Button Pressed");
}
答案 0 :(得分:0)
最有可能猜到?在您发布的代码中,您的财产和您的ivar都被称为categoryDelegate
,但您将财产视为名为_categoryDelegate
的ivar。可能这只是一个错字,但是因为iOS允许调用null对象上的方法(并且什么都不做),所以它会无声地失败。将ivar重命名为_categoryDelegate
应修复它。
答案 1 :(得分:0)
由于您有presentModalViewController:您的 SCVC ,您的 AddAPlaceViewController 处于非活动状态。如果您可以使用自定义委托方法将showCategoriesViewController创建为UITableView的子类,那就更好了。
参考Link