如何用SplitViewController控件
但是從蘋果公司提供資料以及網上的各種信息來看,似乎無法在TabBar中使用SplitViewController,在IB中也只能設置Tab爲ViewController或者TableViewController。
網上有很多人討論這個課題,本人也在開發一個軟件時希望某一個Tab中能使用SplitViewController,經過多方研究,終於找到在Tab中實現SplitViewController的方法,在網上介紹後已被國外的開發者採用,請看一個德國開發者的作品http://itunes.apple.com/de/app/jugendsprache-worterbuch-der/id39920639mt=8,現將此法介紹給大家共享。
根據使用者的愛好和編程熟練度可以分成兩種做法,其一是以IB爲主編程爲輔的方法,其二是完全編程方法,下面將介紹前一種方法。
第一步:使用xCode的SplitView模版生成一個新項目並編譯保存。
第二步:再用xCode的TabBar模版作爲你的新項目並編譯保存,假設項目名爲SplitInTabBarAppDelegate
第三步:在第二步的項目中加一個新Tab
第四步:把第一步生成的項目中的RootViewController.*, DetailViewController.*等文件複製到第二步的項目中
第五步:在SplitInTabBarAppDelegate.h中加入下面的代碼:
@class RootViewController;
@class DetailViewController;
@interface SplitInTabBarAppDelegate : NSObject {
UIWindow *window;
UITabBarController *tabBarController;
UISplitViewController *splitViewController;
RootViewController *rootViewController;
DetailViewController *detailViewController;
}
@property (nonatomic, retain) IBOutlet UIWindow *window;
@property (nonatomic, retain) IBOutlet UITabBarController *tabBarController;
@property (nonatomic, retain) IBOutlet UISplitViewController *splitViewController;
@property (nonatomic, retain) IBOutlet RootViewController *rootViewController;
@property (nonatomic, retain) IBOutlet DetailViewController *detailViewController;
@end
第六步:在SplitInTabBarAppDelegate.m中加入下面的代碼
#import "SplitInTabBarAppDelegate.h"
#import "RootViewController.h"
#import "DetailViewController.h"
@implementation SplitInTabBarAppDelegate
@synthesize window;
@synthesize tabBarController;
@synthesize splitViewController;
@synthesize rootViewController;
@synthesize detailViewController;
#pragma mark -
#pragma mark Application lifecycle
-(void) makeSplitViewController {
NSMutableArray *controllers = [NSMutableArray arrayWithArray:tabBarController.viewControllers];
int index = 0;
for (UIViewController *controller in tabBarController.viewControllers) {
if (index == 2) {
detailViewController = [[DetailViewController alloc] initWithNibName:@"DetailView" bundle:nil];
rootViewController = [[RootViewController alloc] initWithStyle:UITableViewStylePlain];
rootViewController.detailViewController = detailViewController;
rootViewController.navigationItem.title = @"List";
UINavigationController *nav = [[[UINavigationController alloc] initWithRootViewController:rootViewController] autorelease];
splitViewController = [[UISplitViewController alloc] init];
splitViewController.tabBarItem = controller.tabBarItem;
splitViewController.viewControllers = [NSArray arrayWithObjects:nav, detailViewController, nil];
splitViewController.delegate = detailViewController;
[controllers replaceObjectAtIndex:index withObject:splitViewController];
}
index++;
}
tabBarController.viewControllers = controllers;
}
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary*)launchOptions {
// Override point for customization after app launch.
[self makeSplitViewController];
// Add the tab bar controller's current view as a subview of the window
[window addSubview:tabBarController.view];
[window makeKeyAndVisible];
return YES;
}
- (void)splitViewController: (UISplitViewController*)svc willHideViewController:(UIViewController*)aViewController withBarButtonItem:(UIBarButtonItem*)barButtonItem forPopoverController: (UIPopoverController*)pc {
UIBarButtonItem *first = nil;
if (toolbar.items.count > 0) {
first = [toolbar.items objectAtIndex:0];
}
if (![first.title isEqual:barButtonItem.title]) {
barButtonItem.title = @"Root List";
NSMutableArray *items = [[toolbar items] mutableCopy];
[items insertObject:barButtonItem atIndex:0];
[toolbar setItems:items animated:YES];
[items release];
self.popoverController = pc;
}
}
第七步:現在編譯第二步的項目就會看到下面的結果。