MGSplitViewController不是RootView而是在UIViewController中

Question

我对iOS编程非常陌生(来自Java/c++)。我试图设置一个应用程序与TabBarController其中一个标签应该是一个SplitView。我已经做了我的研究，我知道UISplitview不会工作，到处都有人推荐使用MGSplitViewController。我看过演示，但我只是不知道如何使用它没有它是应用程序的根视图，找不到任何样本代码，可以帮助这是我在一个单独的UIViewController类中对演示中的类所做的处理之后我将其添加到TabBarController中:这是我的类:

#import <UIKit/UIKit.h>
#import "MGSplitCornersView.h"
#import "RootViewController.h"
#import "DetailViewController.h"

@interface ChannelViewController : UIViewController {
    MGSplitViewController *splitViewController;
    RootViewController *rootViewController;
    DetailViewController *detailViewController;
}
@property (nonatomic, retain) MGSplitViewController *splitViewController;
@property (nonatomic, retain) RootViewController *rootViewController;
@property (nonatomic, retain) DetailViewController *detailViewController;

@end

这是我绝望的尝试

- (id)initWithTabBar
{
    self = [super init];
    //this is the label on the tab button itself
    self.title = @"SplitView";
    //use whatever image you want and add it to your project
    //self.tabBarItem.image = [UIImage imageNamed:@"name_gray.png"];
    // set the long name shown in the navigation bar at the top
    self.navigationItem.title=@"Nav Title";
    self.splitViewController = [[MGSplitViewController alloc] init];
    self.rootViewController = [[RootViewController alloc] init];
    self.detailViewController = [[DetailViewController alloc] init];
    [self.splitViewController setDetailViewController:detailViewController];
    [self.splitViewController setMasterViewController:rootViewController];
    [self.view addSubview:splitViewController.view];
    [self.rootViewController performSelector:@selector(selectFirstRow) withObject:nil afterDelay:0];
    [self.detailViewController performSelector:@selector(configureView) withObject:nil afterDelay:0];
    if (NO) { // whether to allow dragging the divider to move the split.
    splitViewController.splitWidth = 15.0; // make it wide enough to actually drag!
    splitViewController.allowsDraggingDivider = YES;
    }
    return self;
}

我猜我在委托上做错了什么?还是我把别的东西弄混了?演示在IB中做的事情是我在代码中看不到的吗?我得到了分屏视图，但是没有内容，特别是没有带有演示自带按钮的导航栏。

我将非常感谢提示或示例代码!

Answer 1

好了，manny，我们开始吧。这是我的工作代码的接口:

#import <UIKit/UIKit.h>
#import "MGSplitViewController.h"
#import "ecbView.h"
#import "ecbCalc.h"
@interface splitMain : MGSplitViewController <UIPopoverControllerDelegate,
                                              MGSplitViewControllerDelegate>
{
    IBOutlet UIPopoverController*       popoverController;
    IBOutlet UINavigationController*    naviController;
    IBOutlet ecbCalc*                   viewCalcLeft;
    IBOutlet ecbView*                   euroRatesRight;
             UIBarButtonItem*           savedButtonItem;
             BOOL                       keepMasterInPortraitMode;
             BOOL                       memoryWasDropped;
             BOOL                       viewLoaded;
}
@property (nonatomic, retain) UIPopoverController* popoverController;
@property (nonatomic, retain) UINavigationController* naviController;
@property (nonatomic, retain) ecbCalc* viewCalcLeft;
@property (nonatomic, retain) ecbView* euroRatesRight;
@property (nonatomic, retain) UIBarButtonItem* savedButtonItem;
@property (nonatomic, readonly) BOOL keepMasterInPortraitMode;
@property (nonatomic, readonly) BOOL memoryWasDropped;
@property (nonatomic, readonly) BOOL viewLoaded;
- (void)dismissPopoverController: (BOOL)animated;
- (void)settingsChanged;
@end

和这里的实现文件摘录:

- (id)initWithCoder:(NSCoder *)aDecoder
{
    if ((self = [super initWithCoder:aDecoder]))
    {
        // my initialization...
    }
    return self;
}
// Implement loadView to create a view hierarchy programmatically, without using a nib.
- (void)loadView
{
    CGRect  rectFrame = CGRectMake(0.0, 20.0, 768.0, 1004.0 - 48.0);    // being above a tab bar!
    viewLoaded     = NO;
    self.view      = [[UIView alloc] initWithFrame:rectFrame];
    viewCalcLeft   = [[ecbCalc alloc] initWithNibName:@"ecbCalc" bundle:nil];
    euroRatesRight = [[ecbView alloc] initWithNibName:@"ecbView-iPad" bundle:nil];
    naviController = [[UINavigationController alloc] initWithRootViewController:self.viewCalcLeft];
    naviController.navigationBar.barStyle = UIBarStyleBlack;
    naviController.title = nil;
    viewCalcLeft.title   = NSLocalizedString(@"BtnTitleCalc",  @"");
    viewCalcLeft.view.hidden = NO;
    NSUserDefaults* prefs = [NSUserDefaults standardUserDefaults];
    if ([prefs objectForKey:@"iPadAlwaysSplitTableView"] != nil)
        self.keepMasterInPortraitMode = [prefs boolForKey:@"iPadAlwaysSplitTableView"];
    else
        self.keepMasterInPortraitMode = YES;
    NSArray*    theViewControllers = [NSArray arrayWithObjects:self.naviController, self.euroRatesRight, nil];
    [self setViewControllers:theViewControllers];
    [self setDelegate:self];
    [self setShowsMasterInPortrait:keepMasterInPortraitMode];
}
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad
{
    // protection because this one is called twice
    if (viewLoaded)
        return;
    [super viewDidLoad];
    if (memoryWasDropped)
    {
        if (!self.keepMasterInPortraitMode && UIInterfaceOrientationIsPortrait(self.interfaceOrientation))
        {
            // recreate popover controller
            self.popoverController = [[UIPopoverController alloc] initWithContentViewController:self.viewCalcLeft];
        }
    }
    viewLoaded = YES;
}
- (void)didReceiveMemoryWarning
{
    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];
    memoryWasDropped = YES;
    // Release any cached data, images, etc. that aren't in use.
}
- (void)viewDidUnload
{
    [super viewDidUnload];
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
    [self dismissPopoverController:NO];
    self.popoverController = nil;
    self.naviController    = nil;
    self.viewCalcLeft      = nil;
    self.euroRatesRight    = nil;
    viewLoaded = NO;
}

我的主窗口。xib有一个UITabBarController, splitMain的按钮是为这个类配置的，但是带有一个空的xib条目。创建必须经过loadView。也许我可以在loadView中做viewDidLoad。但我必须保护viewDidLoad不被调用两次。这发生在loadView中，只要视图从MGSplitViewController类实例化，因为initWithCoder那里调用[self setup]。在那个函数中，frame矩形是用self。view。bounds计算的，因此viewDidLoad会被再次调用，因为视图还不存在。也许有人可以在MGSplitViewController中实现一个解决方案。但是我太懒了。

要在标签栏控制器上工作，请确保您提交了在MGSplitViewController的git页面上发布的大部分更改。好运。