NSVIewController之间的导航

Question

我是非常新的MAC OSX应用程序开发。在我的应用程序中，我有三个NSViewControllers，它们是PracticeController、NoteController和QuestionController。我必须从PracticeController和QuestionController导航到viewController，然后回到NoteController导航的viewController。

例如:当我们从NoteController从PracticeController导航到back时，当我们从NoteController点击back按钮时，我必须到PracticeController，当我们从QuestionController导航到NoteController时，当我们从NoteController点击back按钮时，我必须到QuestionController。

请帮我怎么做？我正在寻找它。谢谢。

Answer 1

嗯，经过长时间的搜索，我找到了一个开源库，它将UIKit移植到MacOSX。

https://github.com/BigZaphod/Chameleon.git

但对我来说太复杂了，所以我写了我自己的导航控制器。

NSNavigationController.h

#import <Cocoa/Cocoa.h>

@class BaseViewController;
@interface NSNavigationController : NSResponder
@property (nonatomic, strong) BaseViewController *rootViewController;

- (id)initWithRootViewController:(BaseViewController *)rootViewController;
- (NSView*)view;

- (void)pushViewController:(BaseViewController *)viewController animated:(BOOL)animated;
- (BaseViewController *)popViewControllerAnimated:(BOOL)animated;
@end

NSNavigationController.m

#import "NSNavigationController.h"
#import "AppDelegate.h"
#import "BaseViewController.h"

@interface NSNavigationController ()
@property (nonatomic, strong) NSMutableArray *viewControllerStack;
@end

@implementation NSNavigationController
- (id)initWithRootViewController:(BaseViewController *)rootViewController
{
    self = [super init];
    if (self) {
        self.rootViewController = rootViewController;
        self.rootViewController.navigationController = self;
        self.viewControllerStack = [[NSMutableArray alloc] initWithObjects:self.rootViewController, nil];
    }
    return self;
}

- (NSView*)view
{
    BaseViewController *topViewController = [self.viewControllerStack objectAtIndex:[self.viewControllerStack count] - 1];
    return topViewController.view;
}

- (void)pushViewController:(BaseViewController *)viewController animated:(BOOL)animated
{
    if (viewController != nil) {
        [self removeTopView];
        [self.viewControllerStack addObject:viewController];
        viewController.navigationController = self;
        [self addTopView];
    }
}

- (BaseViewController *)popViewControllerAnimated:(BOOL)animated
{
    BaseViewController *topViewController = [self.viewControllerStack objectAtIndex:[self.viewControllerStack count] - 1];
    [self removeTopView];
    [self.viewControllerStack removeLastObject];
    [self addTopView];

    return topViewController;
}

- (void)removeTopView
{
    BaseViewController *topViewController = [self.viewControllerStack objectAtIndex:[self.viewControllerStack count] - 1];
    [topViewController.view removeFromSuperview];
}

- (void)addTopView
{
    BaseViewController *topViewController = [self.viewControllerStack objectAtIndex:[self.viewControllerStack count] - 1];
    AppDelegate *delegate = (AppDelegate*)[NSApp delegate];
    [delegate.window.contentView addSubview:topViewController.view];
}
@end

BaseViewController.h

#import <Cocoa/Cocoa.h>

@class NSNavigationController;

@interface BaseViewController : NSViewController
@property (nonatomic, weak) NSNavigationController *navigationController;
@end

BaseViewController.m

#import "BaseViewController.h"

@interface BaseViewController ()

@end

@implementation BaseViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Initialization code here.
    }
    return self;
}

@end

这是最简单的NavigationController。我没有实现视图动画。希望能帮上忙。