我遍历this教程，并为iPhone创建了一个图片库。现在，我想将其添加到我的TabBar项目中。我已经听说过，Three20不支持XIB，所以我将整个选项卡栏设置更改为以编程方式。我认为我离最终解决方案不太远。
我能够在一个选项卡中使照相馆工作，但是没有功能（单击图片->它会打开，等等）。页面顶部没有导航可引导您到详细图像页面。当我从应用程序委托中的didFinishLaunchingWithOptions-方法中删除此代码时，我遇到了这个问题：
// Override point for customization after application launch
TTNavigator* navigator = [TTNavigator navigator];
TTURLMap* map = navigator.URLMap;
[map from:@"demo://album" toViewController: [AlbumController class]];
[navigator openURLAction:[TTURLAction actionWithURLPath:@"demo://album"]];
return YES;
我必须将其删除，因为否则将不会显示整个标签栏。相册将使用整个屏幕。我不确定是否只是未显示或未加载。我也尝试过：
tabbar.hidesBottomBarWhenPushed = NO;
但这根本没有用。我试图将TTNavigator代码添加到AlbumController本身的loadView（），viewDidLoad（）和init（）中，但没有结果。有谁知道我必须把它放在哪里才能正常工作？
我的AlbumController.h：
#import <Foundation/Foundation.h>
#import <Three20/Three20.h>
@interface AlbumController : TTThumbsViewController {
// images
NSMutableArray *images;
// parser
NSXMLParser * rssParser;
NSMutableArray * stories;
NSMutableDictionary * item;
NSString * currentElement;
NSMutableString * currentImage;
NSMutableString * currentCaption;
}
@property (nonatomic, retain) NSMutableArray *images;
@end
和我的didFinishLaunchingWithOptions方法的实现：
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// set up tab bar controller
tabBarController = [[UITabBarController alloc] init];
albumController = [[AlbumController alloc] init];
firstViewController = [[FirstViewController alloc] init];
secondViewController = [[SecondViewController alloc] init];
firstViewController.delegateRef = self;
tabBarController.viewControllers = [NSArray arrayWithObjects:firstViewController, secondViewController, albumController, nil];
[window addSubview:tabBarController.view];
[window makeKeyAndVisible];
// Override point for customization after application launch
TTNavigator* navigator = [TTNavigator navigator];
TTURLMap* map = navigator.URLMap;
[map from:@"demo://album" toViewController: [AlbumController class]];
[navigator openURLAction:[TTURLAction actionWithURLPath:@"demo://album"]];
return YES;
}
谢谢大家，干杯，不要
最佳答案
好的，在Bryan的帮助下，我得以在标签栏应用程序中运行照片库。我看到有很多人在寻找这种解决方案，所以我会尽力解释一下。
似乎无法将Three20与Interface Builder一起使用，因此您必须手动设置选项卡栏应用程序。这是我的Three20PhotoGalleryAppDelegate.h：
#import <UIKit/UIKit.h>
#import <CoreData/CoreData.h>
#import "AlbumController.h"
#import "SecondViewController.h"
#import "FirstViewController.h"
@class TabBarAppViewController;
@class AlbumController;
@class SecondViewController;
@class FirstViewController;
@interface Three20PhotoGalleryAppDelegate : NSObject <UIApplicationDelegate> {
UIWindow *window;
UITabBarController *tabBarController;
AlbumController *albumController;
FirstViewController *firstViewController;
SecondViewController *secondViewController;
@private
NSManagedObjectContext *managedObjectContext_;
NSManagedObjectModel *managedObjectModel_;
NSPersistentStoreCoordinator *persistentStoreCoordinator_;
}
@property (nonatomic, retain) IBOutlet UIWindow *window;
@property (nonatomic, retain) UITabBarController *tabBarController;
@property (nonatomic, retain) AlbumController *albumController;
@property (nonatomic, retain) SecondViewController *secondViewController;
@property (nonatomic, retain) FirstViewController *firstViewController;
@property (nonatomic, retain, readonly) NSManagedObjectContext *managedObjectContext;
@property (nonatomic, retain, readonly) NSManagedObjectModel *managedObjectModel;
@property (nonatomic, retain, readonly) NSPersistentStoreCoordinator *persistentStoreCoordinator;
- (NSURL *)applicationDocumentsDirectory;
- (void)saveContext;
@end
请确保您创建一个新的UITabBarController以及所有ViewController。让我们继续我的Three20PhotoGalleryAppDelegate.m：
#import "Three20PhotoGalleryAppDelegate.h"
#import "AlbumController.h"
#import "SecondViewController.h"
#import "FirstViewController.h"
#import <Three20/Three20.h>
@implementation Three20PhotoGalleryAppDelegate
@synthesize window;
@synthesize albumController;
@synthesize firstViewController;
@synthesize secondViewController;
@synthesize tabBarController;
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// set up tab bar controller manually
tabBarController = [[UITabBarController alloc] init];
albumController = [[AlbumController alloc] init];
firstViewController = [[FirstViewController alloc] init];
secondViewController = [[SecondViewController alloc] init];
/* This is the essential part of the solution. You have to add the albumController to a
new navigation controller and init it as RootViewController*/
UINavigationController* navController = [[[UINavigationController alloc] initWithRootViewController:albumController] autorelease];
// now add all controllers to the tabBarController
tabBarController.viewControllers = [NSArray arrayWithObjects:firstViewController, secondViewController, navController, nil];
[window addSubview:tabBarController.view];
[window makeKeyAndVisible];
}
- (BOOL)application:(UIApplication*)application handleOpenURL:(NSURL*)URL {
TTOpenURL([URL absoluteString]);
return YES;
}
- (void)dealloc {
[tabBarController release];
[window release];
[super dealloc];
}
@end
请注意，您不需要教程中的TTNavigator内容。现在，我们必须以某种方式获取我们的照相馆。我像本教程一样在AlbumController中进行了构建。这是我的AlbumController.h：
#import <Foundation/Foundation.h>
#import <Three20/Three20.h>
@interface AlbumController : TTThumbsViewController {
}
@property (nonatomic, retain) NSMutableArray *images;
@end
您可以在上述教程中找到AlbumController的实现。现在，AlbumController.m：
#import "AlbumController.h"
#import "PhotoSource.h"
#import "Photo.h"
@implementation AlbumController
@synthesize images;
- (id)init
{
if (self = [super init])
{
// Initialization code
self.title = @"Photo Gallery";
self.hidesBottomBarWhenPushed=NO;
}
return self;
}
- (void)viewDidLoad {
[self createPhotos]; // method to set up the photos array
self.photoSource = [[PhotoSource alloc]
initWithType:PhotoSourceNormal
title:@"All in Vain"
photos:images
photos2:nil];
}
-(void)createPhotos {
// your independent implementation
}
@end
如上面问题描述中所述，我的相册始终使用全屏显示。这很糟糕，因为您不能再使用标签栏图标。为此，您必须添加
self.hidesBottomBarWhenPushed=NO;
到上面的AlbumController-init-method中提到的init（）方法。
太好了。我真的希望有人可以重用我的解决方案。再次感谢Bryan。
干杯们，
杜诺
PS：我已经在github上创建了一个项目。您可以下载示例应用程序here。